Solar villa is a technology that integrates solar power (photovoltaic) products into buildings using photovoltaic building integration technology. The forms of combining photovoltaics with buildings mainly include combining with roofs, walls, and shading devices. The system installation can adopt either grid connected power generation or off grid power generation system. The combination of photovoltaics and buildings has great advantages, as it can generate and use electricity in situ, reduce the cost and energy consumption of current transportation, and eliminate the need for separate support structures for photovoltaic equipment. The entire system not only ensures its own building power supply, but also provides power to the grid, easing peak electricity demand. In addition, photovoltaic arrays are installed on roofs and walls and directly absorb solar energy, avoiding high wall and roof temperatures, reducing air conditioning loads, and improving indoor environments. Off grid photovoltaic power generation systems consist of solar photovoltaic arrays, solar controllers, inverters, batteries, switching control boxes, and other equipment. They can be divided into two types: pure off grid photovoltaic power generation systems and grid complementary off grid power generation systems. They can also complement wind energy to form wind solar complementary off grid power generation systems. (1) Operating principle: Off grid power generation: Photovoltaic modules convert solar energy into electrical energy under illumination, and provide power to the load through a solar charging and discharging controller, while also charging the battery pack; When there is no light, the DC load is powered by the battery pack through the solar charging and discharging controller. At the same time, the battery also directly supplies power to the independent inverter, which inverts the AC current and supplies power to the AC load. (2) Scope of application: Off grid photovoltaic power generation systems are widely used in remote mountainous areas, areas without…
