Just install a 100W panel and free inverter Battery charging from Main Line and save 20 to 30 % electricity bill . We know the battery charging from Electrical line is a continues process . we can avoid this just adding a 100 W panel it gives 5 to 8 Amps in day light ..
Our High tech Charge control + Energy Modulator .. will control the inverter and battery . When the battery reach 14.50 v . the inverter start function and it will use both soal + battery energy till the battery reach 11.9 V ..