Energy access is the golden thread that joins three sustainability dimensions—economic prosperity, social development and living within environmental limits. With about 1.1 billion people lacking access to electricity and around 2.8 billion lacking access to clean cooking energies in 2016 (that is they rely on solid fuels such as coal, biomass and other traditional forms of energies that are polluting) [1
], lack of energy access acts as a major hindrance to global efforts towards sustainable development. The population lacking access to electricity is mainly concentrated in Sub-Saharan Africa (588 million) and South Asia (337 million) and the rural population in general and those with low income in particular suffer the most (for example, 23% of rural habitants in sub-Saharan Africa have access to electricity as compared to 81% in developing Asia). Bhattacharyya [2
] found that households with an income of less than $
1000 per person in 2005 purchasing power parity (PPP) generally lack access to clean energy, which in turn leads to poor Human Development Indicators (HDI) scores. HDI scores are positively correlated with access to electricity and access to clean cooking energies. This in turn implies that access to clean energy positively influences life expectancy at birth and mean schooling years and contributes to better human capacity development, which opens up opportunities for economic development while reducing social burdens on the environment. Households with low income spend a high share of their income on poor quality energy and depend on inefficient technologies to meet their needs. They continue to live in the vicious circle of poverty, poor health, limited human capital and degraded environments. Clearly, access to clean energy is a pre-requisite to sustainable development and realizing universal energy access remains a global challenge.
Despite a recent thrust on energy access with the launch of Sustainable Energy for All in 2012 and the inclusion of energy access as a global sustainable development target (in the form of Goal 7 of the Sustainable Development Goals in 2015) to be achieved by 2030, the electricity access progress has been slow. Although more than a billion people have gained access to electricity since 2000 [1
], the progress has been dominated by just a few countries like India, Indonesia and other South East Asian countries. Sub-Saharan Africa, on the other hand, has seen an increase in the size of its unelectrified population over the past sixteen years (from 518 million in 2000 to 588 million in 2016) due to population growth [1
]. More recently, between 2012 and 2014, an access deficit reduction of one million per year was achieved globally (the global population has increased on average 85.5 million per year whereas electricity access has increased by 86.5 million), but the regional performance remains striking. Asia-Pacific reduced the access deficit by 5 million (population growth 42 million and electricity access 47 million) during this period, whereas in sub-Saharan Africa the access gap increased by 6 million (19 million gained access against a population growth of 25 million) [3
], thereby showing no real progress in the region. The spatial distribution of the incremental access gain reveals that out of about 87 million gaining electricity access between 2012 and 2014, 81 million were in urban areas and only 6million rural population gained access, which was overshadowed by rural population growth [3
]. Clearly, progress with rural electrification remains unsatisfactory, particularly in sub-Saharan Africa and reaching the bottom billion requires special attention.
Stepping up electrification progress becomes crucial in order to reach the universal electrification objective by 2030. Against a target rate of increase in electrification of 0.92% per year to achieve universal electrification, only 0.19% increase was achieved between 2012 and 2014, a rate which was considerably slower than the historical annual growth rates in energy access provision (0.51% between 1990 and 2010 and 0.69% between 2010 and 2012) [3
]. Recognising that the progress in the past came from a small number of relatively better-off countries (such as India, Indonesia, Ghana, etc.) and that the future progress has to be more widespread, particularly in low-income countries, highly indebted countries and fragile states, the importance of stepping up the efforts becomes self-evident [4
]. Whereas the past progress was dominated by extension of the existing grid [2
], this is unlikely to be the case in the future, as grid availability is an issue in most areas and serving consumers with limited paying capacity and low demand is not a cost effective proposition for normal electric utilities. Alternative business models are emerging to serve this segment through mini-grids that carry locally generated electricity using local grids.
Over the past several years, the mini-grid business has grown significantly and they have appeared in different shapes and sizes throughout the world. IRENA indicates that more than 10,000 isolated mini-grids are operating in countries like India, Bangladesh, China, among others [5
]. A study by IFC indicates that there is a potential market of $
4 billion and 28 million customers can be served using mini-grids [6
]. Innovative business ideas, technology applications and practices have allowed leap-frogging the technological stages of development to offer modern services combining smart metering, payments through mobile phones and remote monitoring. Several successful examples of mini-grid based supply have been reported in the literature from around the world: Schnitzer et al. [7
] provide several examples of successful micro-grids from India, Malaysia and Haiti covering private sector, government and non-profit sector interventions. The Indian examples of Husk Power System and DESI Power have also appeared in other studies [8
]. The Alliance for Rural Electrification [8
] provides examples of mini-grid projects from around the world. For example, Sunlabob has successfully developed a hybrid mini-grid in Lao PDR combining micro-hydro, solar PV and a diesel generator. A UNIDO study provides examples of successful mini-grids in six African countries (Chad, the Gambia, Guinea-Bissau, Cote-d’Ivoire, Tanzania and Zambia) and two Asian countries (India and Sri Lanka) [10
]. Mini-grids have appeared in various parts of the world. However, despite the potential, the progress has been hindered by a range of barriers and the integration of productive use of electricity has remained limited [8
This paper presents a critical review of available literature on mini-grid development and explores whether mini-grids can be a solution for the population at the base of the pyramid (BoP), what challenges the mini-grid business face and how such options can be supported to make the option more effective for universal electrification. The paper is organised as follows: Section 2
provides a brief description of mini-grids covering the technical features and delivery arrangements. Section 3
introduces the base of the pyramid market for electricity and confirms the role mini-grid can play in the BoP market. Section 4
provides a review of issues facing mini-grid based electricity supply for the BoP market while Section 5
focuses on support options to mitigate the challenges. Finally, concluding remarks and recommendations are provided.
3. Market at the Base of the Pyramid
The interest in the base of the pyramid (BoP) consumers can be traced from the works of Prahalad and Hart [27
] and Prahalad and Hammond [28
] who suggested that 4 billion people living with less than $
2000 per year form the largest section of the consumer base and there are significant business opportunities for serving these consumers. However, specific features of these consumers bring significant challenges: (1) their paying capacity is low as many of them are engaged in the informal sector and in seasonal activities [29
]; (2) the absence of regular income flow, lack of credit record and inability to satisfy lending requirements limit their access to traditional funding channels, which further reduces their ability to pay for traditional services [24
]; (3) As a consequence of funding and income constraints, their individual demand tends to be low and the standard supply package used by service providers for other consumers may not be suitable for such markets; (4) Affordability of the service assumes significance for these consumers and Cook found that connection charges and electricity tariffs make electricity services unaffordable to the bottom-of-the-pyramid consumers [30
While base of the pyramid consumers are found in both urban and rural areas, the business environment varies depending on the specific location. As indicated before, the electricity access situation is generally better in urban areas but people without lack of access to electricity can still be found in peri-urban locations or areas close to cities. Peri-urban areas offer locational advantages to businesses due to larger consumer base, better consumer mix (due to more likelihood of existence of commercial activities), high concentration of the consumers (which makes physical connectivity easier), and easier access to other services. On the other hand, investors face a higher risk of grid extension which can jeopardise the cost recovery of their investment.
In contrast, challenging conditions in rural areas, particularly in remote areas make BoP market riskier. Limited customer base, poor consumer mix (i.e., absence or limited share of commercial consumers), low population density (i.e., dispersed population particularly in Sub-Saharan Africa), physical remoteness and limited access to skills and human capital enhance the investment risk. On a positive note however, the risk of grid extension is likely to be low due to lower electrification priority accorded to less viable areas.
Providing services in such cases requires significant adaptation to the local context, initiatives for shaping the market and efforts for social embeddedness [31
]. Following [14
], four elements of a business model, namely value proposition for the customer, customer engagement or interface, value chain linkages and monetisation can be identified for the BoP market in the mini-grid based electrification. Push and pull factors within these elements offer different possibilities for service providers to define their businesses. Various examples can be found from the literature showing how the mini-grid businesses have tried to shape their businesses. Some such examples include the following:
One successful adaptation has been to provide the service in small, affordable units [32
]. Taking advantage of LED lighting, many mini-grid businesses are offering extremely low wattage level supplies (less than 5 W in the case of lighting only services) that were unthinkable in the era of the central grids. Even those suppliers providing lighting plus services or higher tier services are also packaging their supplies quite differently from the standard utility supplies, thereby adapting to the customer needs.
Privately-owned and commercially motivated supply providers are setting tariffs for their services considering expenditure on alternative options that compete with mini-grid based electricity. To ensure attractiveness of their supply, the tariff is being set lower than expenses on monthly kerosene consumption or payments to diesel generator-based supplies.
Businesses are using innovative billing and collection systems using smart meters, prepaid meters, and mobile payment systems to improve revenue collection efficiency and reduce defaults.
To mitigate business environment-related risks, innovative contractual arrangements are being used: for example, joint liability groups have been used to manage credit and payment risks. Similarly, flexible bill collection approaches (daily or weekly collection) have tried to align billing cycle to consumer characteristics [33
To support financing their electricity access, micro-credit facilities are being used. The supply provider working with the consumers organise such credits so that the market is created. The example of Grameen Bank in Bangladesh appears in the literature widely but such credit systems are being used in other countries as well [31
]. However, Reference [33
] remarks that poor consumers are paying high interest rates (2 to 3% per month) for the credit remains a major issue.
The above discussion answers our first question: mini-grid based electricity supply is reaching the BoP market and offering basic level of services. However, despite the efforts to adapt to the BoP market environment, the mini-grid based electricity provision faces significant challenges. We turn to these issues in the next section.
4. Challenges Facing Mini-Grid Based Electricity Supply in BoP Markets
This section focuses on three main challenges: weak regulatory and policy environment, business viability and affordability challenges, and financing issues.
Manetsgruber et al. [34
] undertook a stakeholder consultation to identify the risks to mini-grids. Figure 1
shows the main barriers identified by the study. Weak enabling environment (regulatory and policy frameworks) emerges as the main challenge, followed closely by lack of appropriate fund structure, inadequate funding ticket size and lack of background knowledge of financiers.
4.1. Regulatory and Policy Environment
In order to ensure electrification of BoP markets, a properly defined business environment is an essential requirement, particularly when the private sector participation is aimed at to accelerate the electrification process. A mini-grid based supply is a mini utility business involving generation, distribution and retail supply activities and the business environment is influenced by institutional endowments and institutional arrangements. The local policy and business environment influence the investment decisions but the literature has paid less attention to support mechanisms to promote mini-grid activities. While [35
] has devoted a lot of attention to developing the independent power producer model for rural electrification where the generator enters into a contractual arrangement with the utility company for sale of power or sales to the bulk consumers through a contract, the mini-grid development in most countries is not following the functional separation model of business activities. Instead, a vertically integrated approach covering generation, distribution and retail supply is being used by the mini-grid businesses. In what follows, a functionally integrated business model is being considered.
Based on the available literature, regulatory weaknesses in a number of areas can be identified [24
: The service area of a mini-grid based supply may not be clearly demarcated avoiding overlaps with the service area of the central grid utility. In many countries, the national electricity company or a distribution licensee may already have the jurisdiction over the area and unless a service area for the mini-grid is carved out legally, the legal basis for the mini-grid can be problematic. Moreover, this leads to the other issue, which [37
] calls the gateway problem—the threat of grid extension by the central grid. In the absence of clarity over jurisdiction of service area, the threat of grid extension acts as a major deterrent for private sector investment in mini-grids. The possibility of an aggressive grid extension effort by the incumbent and the potential for stranded mini-grid assets in the absence of a defined exit mechanism is a major investment risk. This can also be an issue when two or more mini-grid operators appear in the same area—which can duplicate the system and lead to non-optimal resource use. Accordingly, a non-overlapping service area is essential.
Permission for doing business
: Electricity generation and supply is a regulated activity in most countries around the world but the legal provisions do not often recognise the decentralised models of supply. This may be due to old legal provisions or may be deliberately left out to avoid overburdening of the regulatory system. In the absence of a proper approval system, legitimising mini-grid businesses may be difficult. Ambiguity in the legal area breeds confusion and alternative interpretations cause business uncertainty, which reduces attractiveness of the market to potential investors. A simple, transparent and low cost approval system is a must [38
Eligibility requirements: Being an emerging opportunity, many new entrants are entering the business but unless they meet certain capacity requirements (in technical, financial and organisational terms), the development of the business is likely to be affected through reduced credibility, loss of trust and perhaps misuse of resources. Lack of clear eligibility requirements opens the door to everyone, making it difficult for the serious businesses to establish themselves.
Conditions of supply
: A business engaged in electricity supply has to satisfy a certain conditions. For example, the supply has to be safe and secure. The service has to offer non-discriminatory supply to all eligible consumers. Similarly, conditions for connection/disconnection, prevention of market abuse, minimum performance targets, etc. are other conditions normally applied. Lack of clarity about business engagement and expectations can reduce effectiveness of the businesses [35
: Any confusion regarding tariffs or any potential for disagreement in this area can be fatal for the viability of a mini-grid business. While businesses aim for cost recovery, high cost of supply can limit the consumer base due to affordability issues. On the other hand price parity with the central grid or a uniform tariff for all mini-grids can create viability issues for the investors [13
]. Balancing this trade-off is a demanding challenge as favouring one will affect the other party adversely. For example, in the Uttar Pradesh Mini-grid Policy in India, if the mini-grid developer adopts the capital subsidy route where 30% of the capital cost will be subsidised, then the tariff has been prescribed for the basic service level (serving a load of 100 W for 8 h per day). The prescribed tariff aims parity with grid-based supply but this is unlikely to make the mini-grid business viable [37
]. An overly prescriptive approach is likely to be less acceptable to the investors while a very lenient approach can lead to abuse of market power by the supplier. Negotiated solutions are allowed in some countries but as the supplier tends to have a higher bargaining power, the decision-making can be highly influenced by them.
The regulatory needs of mini-grid investors can be summarised under four headings: technical, commercial, economic and administrative [8
]. The technical operating standards, safety, reliability and quality standards would come under the technical head. Tariff and conditions of supply that affect the profitability of the business would come under the commercial aspect. The subsidy and other support mechanisms to assist economic viability of mini-grid businesses would fall under the economic head. Finally, the administrative procedures for setting up and doing business will fall under the administrative dimension.
In addition to a stable regulatory environment, the business environment also needs supportive policies to facilitate the development of a thriving business. A range of policies at the national and local levels influences the investments in mini-grids. For example, the fiscal policies directly affect the costs and incomes of a project. Being modern technologies, many countries rely on imports of project components and the import duty can directly affect the capital cost of a project significantly. It is reported that phasing-in of value added tax on solar panels in Kenya has affected the profit margins of mini-grid operators [39
]. Similarly, the subsidy policy particularly on electricity supply from the central grid and on fossil fuels that compete with mini-grid electricity affects the project viability. While consumers of central grid electricity benefit from subsidy and cross-subsidies, the mini-grids are generally excluded from this support [40
], thereby creating a disconnected policy framework. Financial policies particularly those relating to credits and debt financing (including commercial loans) are relevant for the mini-grid businesses. As discussed below, financial issues remain a major constraint for mini-grid businesses around the world.
Another area where policy integration is lacking is the use of mini-grid based electricity for productive purposes and income generation. Although significant potential exists for integration of livelihood activities, mini-grids have hardly exploited such potentials and very limited income generation activities have been realised in practice [41
]. Lack of efforts to embed rural electrification efforts in the local development agenda is a manifestation of the absence of a whole systems approach to policy-making.
Evidently, the more prepared a country is in terms of its business environment, more attractive it will be to investors. An international comparison of regulatory indicator for sustainable energy by the World Bank [42
] has ranked countries for regulatory environment for energy access, renewable energy and energy efficiency. The energy access component has been evaluated using 8 sub-indicators, each scored out of 100. The overall score is obtained by averaging the sub-indicators. For the energy access component India, with 84 points, tops the list (see Table 2
). At the component level, green traffic lights for all categories also confirm India’s position compared to other countries. In fact, India is the only country in the list with all green lights (see Table 2
). It confirms that India has put in place all relevant pieces to create the enabling environment. Kenya and the Philippines follow closely with 82 points but Kenya has two scores in the yellow range whereas Philippines has one yellow score. On the other hand, countries at the bottom of the list are located in Sub-Saharan Africa and most of them do not have suitable regulatory environment in place to support energy access.
In terms of framework for mini-grids, only 14 countries are in the red, while 29 countries are in the yellow category and 12 countries are in green area. This suggests most of the countries have made some progress in respect of mini-grids but there is still some distance to cover to reach a mini-grid friendly regulatory environment in all countries.
A similar picture arises from the global off-grid business indicator (OBIN) presented by [43
]. It identifies India as the largest global market for off-grid business, with a market potential of $
27 billion for rural electrification and above $
5 billion for kerosene replacement. The global off-grid market has been estimated at $
136 billion, which is almost equally split between Asia and Africa. The report then classifies the countries in different regions in five categories in terms of their business environment. Most of the countries fall in the average or below average categories but more African countries appear in the below average category than in Asia. Access to finance, corruption and inadequate infrastructure are identified as major barriers in Africa whereas corruption, inefficient bureaucracy and access to finance are barriers hindering off-grid markets in Asia.
] through a survey of stakeholders in South Asia and sub-Saharan Africa identified the barriers to mini-grid development (see Figure 2
). The stakeholders identified policy uncertainty as the most important challenge. Lack of clarity and information about the electrification plan of a village and lack of information sharing/guarantee mechanism to ensure that grid connectivity will not materialise within a certain period is a major barrier for investors. Unclear regulatory rules particularly related to grid connectivity and asset obsolescence are related issues affecting the investment risk profile.
The long-term sustainability of many off-grid projects is low due to failure to address the socio-cultural issues of the target communities and unresponsive policies arising from failure to incorporate user perspectives [45
]. Creating an enabling policy environment for off-grid supply, particularly for mini-grids is an important issue, for which Bhattacharyya and Palit [33
] offer a set of guidance to create a win-win situation for all stakeholders.
4.2. Viability and Affordability Issues
Various studies have considered the viability of different mini-grid projects and they can be grouped under three main categories: (1) those evaluating the generic case of cost of electricity supply of individual or hybrid combination of generating technologies using levelised cost of supply or similar approaches; (2) techno-economic analysis of real or hypothetical projects using a simulation tool such as Hybrid Optimisation Model for Electric Renewables (HOMER); and (3) case studies of specific projects. Table 3
provides a selected list of studies under each category. It should be noted that there are overlaps in the above categorisation as it is not always possible to fit a study into a specific category. Techno-economic studies are often case study based but because they have used a simulation or feasibility analysis approach, they are placed in the techno-economic category.
Most of the studies on mini-grid project viability mention the advantage arising from the declining costs of solar PV technology but even considering the significant reduction in capital costs, the cost of electricity supply from mini-grid per unit (i.e., per kWh) remains relatively high. Their cost varies over a significant range depending on the technology used: generally diesel-based supply tends to cost the most whereas biogasification plants and micro-hydro systems tend to offer the lowest costs, with solar PV and hybrid options somewhere in between. For example, Reference [37
] estimated the following levelised costs of supply for the Indian case: $
0.95/kWh for household level diesel generators, $
0.94/kWh for kerosene lanterns, $
0.57/kWh for diesel mini-grids, $
0.54/kWh for solar PV-diesel hybrid systems, and $
0.38/kWh for solar PV-battery mini-grids. As indicated in [26
], the unsubsidised cost for the basic service in 2015 ranges between 0.47 to 0.71 USD/kWh whereas for full service the cost ranges between 0.61 to 0.92 USD/kWh. While the cost is likely to decline significantly in the future, the full cost at present remains very high by any standard. Zubi et al. confirm that affordability of solar PV remains an issue in regions lacking electricity access but suggest that strategies like high value applications, energy efficient solutions (such as LED lamps) and cost reduction could improve the attractiveness of the technology [67
Moreover, as the mini-grid supply is often unfavourably compared with the tariff charged by the grid supply (even though grid is unlikely to reach these locations), the acceptance of high cost of supply by the BoP consumers becomes an issue. The innovative tariffs used by the suppliers and the benchmarking of tariffs with current fuel expenditure of the potential users circumvent the issue of direct tariff comparisons with the grid supply. However, where the alternative source of energy is highly subsidised and the grid electricity tariff is kept artificially low, BoP consumers may not accept high cost mini-grid supplies. Further, the question of social justice arises: why the poor in remote and rural locations would have to pay exorbitantly high price for accessing electricity? This gains further legitimacy where the grid has the opportunity to average out the cost and benefits from cross-subsidies and subventions. Due to adverse consumer mix, cross-subsidies are practically impossible for a small local system and operating subsidies generally do not flow to mini-grids. This discrimination affects the BoP market development for electricity.
Clearly, unsubsidised supply is less attractive to the BoP consumers [68
] although willingness to pay studies suggest that consumers are generally not adverse to paying higher charges for a reliable supply. For example, Reference [32
] finds BoP consumers in Bangladesh are willing to pay $
0.43/kWh for electricity from a renewable mini-grid whereas Reference [69
] finds that users of mini-grid supply in India value local supply much higher than the central grid based supply and are willing to pay about INR 70/kWh (or about $
1.05/kWh). However, the willingness-to-pay estimates vary greatly and exploiting the locational disadvantage of the consumers to charge a high tariff cannot be a rationale objective.
To overcome the financial viability challenge, governments and donor agencies have provided financial support to investors to reduce the capital cost burden. As demonstrated in [50
], capital cost subsidy is insufficient for achieving grid-parity price for mini-grids and the operating cost subsidy imposes significant recurring burden on government’s budget, particularly when the plant size increases and the number of such plants multiply. However, mini-grids offer a window of opportunity to rationalise fossil fuel subsidies and use the budget so saved to promote renewable energy mini-grids.
A study by Reference [70
] has provided the comparative strengths and weaknesses of three categories of existing mini-grid initiatives: those supported by financers and donors; those promoted by supply chain entities, and those by NGOs/communities. Table 4
compares some technical characteristics that affect viability of mini-grids.
4.3. Financing Challenges
To achieve the target of universal electrification by 2030, it is estimated that $
52 billion annual investment will be required for the remaining period and about 50% of this investment will go to mini-grids and a majority of the investment will be required in sub-Saharan Africa [1
]. Clearly, financing the universal electrification projects remains a big challenge. There are different perspectives of the problem: for financial institutions and lending agencies, the transaction volume is too low to be cost effective and many large entities are not interested in this market even if some sort of project aggregation is undertaken. Moreover, the business is not understood by the financial sector and is considered to be risky due to lack of bankable revenues streams through sales agreements or power purchase agreements. The mini-grid sector is an infrastructure development activity but unfamiliarity with the risks of this sector makes lenders reluctant to engage with the sector.
To ensure fund flow and increase private sector engagement, the risks have to be mitigated. It suggests that the mini-grid market could benefit from a Risk Sharing Facility. Similarly, a co-developer fund where funds from several sources are raised and which takes the risk to a greater extent can be beneficial for the sector.
On the other hand, the investors need access to suitable funding to reduce their cost of supply and make the investment viable. Depending on the ownership of the mini-grid project, the access to finance can vary. The private investor may have easier access to the capital market because of its previous track record and its ability to use its balance sheet for securing loans. In contrast, a community-based organisation created for the purpose of developing or operating a mini-grid may not have any formal standing as a corporate body. Absence of past credit record for such organisations, limited own-funding ability and limited security for guarantee purposes make borrowing difficult and costly. As most lenders require at least 20 to 30% of the cost as down payment, mobilizing such funds locally can become a Herculean task at the village level, thereby creating hurdles for their integration with the mainstream and making their long-term viability difficult [24
]. A study by Reference [71
] suggests that the ‘bridging capital’ is missing in the nascent mini-grid sector and the tenure of debt capital is too short for an emerging market.
On a related side, one of the hurdles faced by BoP consumers is the ability to pay for connection charges [30
]. Unaffordable charges deter consumers, which in turn lower the demand for electricity for the mini-grid investor. Similarly, electricity demand, being a derived demand, can only arise when consumers buy appliances but the capital-intensive nature of appliances makes it impossible for BoP consumers to buy them. Suitable micro-financing facilities to scale up the energy ladder are required but they may not be available in many places.
] reported the stakeholder perception about the main reasons behind the financial challenge (See Figure 3
). The high-risk perception about the sector is the main barrier. The lending term comes next, which is followed by the general lack of understanding of the financial institutions about the sector.
As small companies are often engaged in the mini-grid sector due to small size of the project, the financial needs are somewhat different and the risk of failure can be high due to low margin of their businesses. IRENA [44
] also indicates that traditional project debt financing or infrastructure financing models do not work for mini-grids as the sector is not mature yet and the commercial banking sector does not understands the risks in the business. The development finance institutions have a role here to bridge the finance gaps and support risk mitigation. There is the need for patient capital.
] compared finance-related positions of different mini-grids (see Table 5
). NGO or community managed mini-grids appear to be in a disadvantageous position and supply chain entities also do not perform well in terms of their financial capabilities. Only financial institution supported mini-grids appear to have the requisite financial knowledge.
4.4. Other Issues
In addition to the above, the mini-grid business faces several other challenges. Technical capacity is an essential requirement to ensure effective design, operation and maintenance required for a reliable supply [8
]. If the capacity is designed without any room for demand growth, the reliability of supply can become a problem. Similarly, the technology choice and proper back-up arrangements are important to avoid consumer dissatisfaction [11
]. However, over-design to allow room for demand growth can be costly and trade-off is required. Moreover, such decisions should be considered at the design stage but given their inter-relatedness with other dimensions, a systematic tool for decision analysis as suggested by [72
] can be helpful for such complex decisions. The supply chain required for the mini-grid deployment is not well developed in many countries and there is little standardisation in terms of design, components used and practices. As a result, a range of systems is being used and it makes inventory management, repairs and system integration more difficult. Power demand uncertainty, power quality risk, equipment failure risk, hardware compatibility, and inadequate storage are some other technical issues identified by Reference [66
Other issues include social, sustainability, organisational and safety issues. For example, Reference [45
] indicates inadequate focus on social embeddedness of mini-grids through stakeholder buy-in. Similar views are also expressed by [13
]. Sustainability issues of mini-grids have also been raised in the literature—particularly those relying on diesel generation and subsidies [2
Regarding barriers to scaling-up of mini-grids, Manetsgruber et al. [34
] indicated that lack of access to finance is the main challenge (Figure 4
). Low profit margin, limited ability to pay and lack of qualified staff emerge as other main barriers.
The report identifies three main categories of risks, namely political risk, payment risk and resource price variability risk. The project viability and return on the investment can suffer due to political changes in a country or political instability. The revenue stream of a project also suffers adversely when a purchaser or off-taker stops paying or reduces paying for the services. The price variability of key input resources (fuel mainly) due to changes in the market conditions also adversely affects a project. They suggest that a standardised risk management procedure would be useful but many mini-grid project developers are not aware of such mechanisms and would need capacity building in this area.
Although a sizeable market for mini-grids can be identified to meet the BoP needs, the existence of barriers and challenges suggests that the markets are unlikely to develop on its own. To mitigate the market failure, there is a need for strategic government interventions to support the market. The next section discusses this.
5. Supports and Interventions for Mini-Grid Business Development
Various studies have provided lessons from their analysis and offered suggestions for interventions. These recommendations range from generic policy and support advices to specific issues such financial or technical or regulatory interventions. Irena [44
] reports the preferred actions for government intervention in the sector (see Figure 5
). It indicates that off-grid policy strengthening and long-term rural electrification strategy appear as the most important areas. Supporting regulations on financing and supportive fiscal measures are the other two important factors identified by them. Capacity building and removal of administrative barriers received relatively lower support while stringent quality control measures received the least support.
Given the conditions of BoP markets are highly context specific and because technology choice, social acceptance, ownership patterns and economic linkages are context dependent, Bhattacharyya et al. suggest that any successful intervention strategy for mini-grids has to be embedded in economic linkages considering the strengths and ability of community structures [75
]. Accordingly, they identify four cases shown in Table 6
—each of which will require a varying set of support arrangements. It is perhaps possible to link the four categories to the regulatory indicator study mentioned previously [42
] and use a similar colour code to identify different categories of locations for intervention strategies. Communities with poor economic linkages and poor community strength would need greater handholding than those areas where the community is thriving and the economic activities are already taking shape. Such a classification of potential markets will be useful to different stakeholders: investors can identify areas for their future investments, policymakers can better target their policies and progress monitoring of development will be easier.
From Table 6
, one area for possible government intervention becomes clear: identification of potential markets and information about their local contexts. This is a time-consuming and resource-intensive process and the government is in a better position to share such information to help mini-grid sector development in any country.
Following from the above spatial characterisation of potential BoP markets, a natural candidate for intervention is to tailor financial support instruments recognising the degree of difficulty of developing a viable mini-grid business. Instead of a standard one-size-fits-all policy and financial support mechanism, policies need to attract investors and social enterpreneurs to challenging market contexts so that no one is left behind. The concept of viability gap funding has been suggested in the literature for this purpose (see for example [69
] particularly in the case public-private partnership projects. Here the difference between the revenue and the costs for the supply is paid to the investor to ensure financial viability. This is a subsidy mechanism but it can be tailored to meet individual cases, although there can be significant administrative costs particularly in the case of small projects). Other financial support arrangements such as making credit lines available through rural banks, agricultural banks and through micro-credit facilities for consumers can also be beneficial for the development of the sector.
A third area of intervention could be embedding the mini-grid development in local development planning activity so that the productive use of energy and general electrification can be harmonised. Developing commercial activities can be a different project in itself and the investor may not have appetite for such additional non-core activities. Such an integration of livelihood opportunities requires the project developer to get involved with the local community to develop the opportunities and can be a costly and time-consuming activity. The developer may not have skills in such activities and often this is beyond their core competence. This can deter investors. Local government engagement can avoid isolated development of mini-grids without any link to the local development agenda. Through a coordinated effort, the overall objective of sustainable development can be better achieved.
However, focusing at the local level will not be enough to address the challenges of mini-grid development and would have to be supplemented by national level frameworks and policies. Possible macro-level interventions include the following:
Giving a legal status to mini-grid business: defining the mini-grid space legally in the electricity acts and clarifying the scope of the business is essential to create the activity;
Defining the regulatory framework: formulating appropriate regulatory arrangements for managing mini-grids, defining standards of service for mini-grids, and policies for entry/ exit and coordination of grid and mini-grid based electrification are some aspects of regulatory and electricity planning that are essential.
Tariff and financial support policy: A generic framework for tariff and subsidy for mini-grids and its delivery mechanism can bring clarity to the business activity.
Fiscal incentives: Tax breaks and tax holidays for businesses, waiver of import duties and reductions in value added tax or service tax are possible ways of incentivising the activities.
Risk mitigation measures: Because mini-grids are considered as high risk low return investment propositions, risk mitigation measures to minimise impacts on the investors can be designed at the national level.
Consumer support mechanisms: Arrangements for supporting the BoP consumers to enable them access electricity will also be important.
Combining macro and local level supports will be essential to deliver the mini-grids at the BoP market.