Abstract
This work proposes the construction of autonomous power supplies for specific home electronics based on reusing available materials. This would allow most standard electrical consumers, solar panels, and accumulators to connect directly and without any charging drivers. The proposed set of steps allows the creation of reproducible power supplies. The use of lead–acid accumulators enables series connection and charging directly from a high-voltage, low-current source, such as a solar panel. This will allow serial charging and discharging of accumulators without balancing, as well as support the direct connection of consumer devices and solar panels without converters. The proposed direct current (DC) operating voltage range, with a center voltage of 100 V, allows the use of eight sequentially connected 12 V accumulators for direct charging from three of the most common solar panels, with 72 cells connected in series (nine accumulators for four panels with 60 cells). At the same time, most home electronics with switched-mode power supplies (SMPSs) are designed for a voltage range of 100 V to 240 V and are capable to work from direct current starting with 15–30% less voltage. This guarantees support of the full voltage range of 8–9 lead–acid accumulators or 26s–32s lithium–ion accumulators for the reproducible construction of home power sources without extra converters. In addition, the reproducible construction of a power inverter with a true sine wave, with recommendations of how to adjust the supported input range to the required voltage for powering the fridge, is proposed. The proposed scalable circuit and assembly instructions for the power inverter based on EGS002 and widespread electrical transformers RT-1000B1 allow reproducible creation of inverters with a true sine output and a wide input voltage range, including 96 V DC. The application of the proposed method allows to reduce energy consumption up to 10% by removing converters.