Per square meter panels around 150 w, calculated according to the photovoltaic design software is the best Angle of 35 degrees received every day under the condition of radiation in the 4 KWH/m squared. If a battery is efficient, 150 w as efficiency at 14. About 5%, 4 panels to power every day * 14. 5% = 0. 58 KWH,
panels 150 watts per square metre, according to the photovoltaic design calculation software, under the best Angle of the 35 degrees, receiving radiation for 4 KWH/m every day. If a battery is efficient, efficiency about 14 when 150 watts. 5%, the panels can produce 4 * 14. 5% = 0. 58 KWH, namely 0 every day. 58 degrees of electricity. I don't know you watch data where it came from. I think something is wrong. Maximum limit should be in June or so, and the radiation is very small, in the summer in the winter is very big, so it was very strange. According to your data, the result is: 14. 5% * 2. 8 = 0. 406 KWH, this is zero. 406 KWH, a little bit less. The efficiency of the whole power system, if it is a small system, should be at about 90%, that is to say, every day you get the actual power is the two Numbers multiplied by 90%, 0. 58 * 90% = 0. 522 degrees; 0. 406 * 90% = 0. 3654 degrees. Perhaps because of pollution or the weather, but I still think your data is wrong. To look again. This table is calculated according to your data, the data are few. Relevant tags: solar panel manufacturers