So I don't understand the math in your reply. Assuming a 12v system, 5-6 amps at 30-50% of the time is say an average of 2 amps X 24 hours=48 AH. If you have a 125W solar panel it would generate realistically about 9 amps on a good sunny day. Say it does that for 6 hours. 6X9= 54 AH. So where do you calculate needing almost 4 times that (400W)?

Steve