Battery manufacturer recommended charge rate of <10% of the 20 hour discharge capacity.
With 2 Trojan T1275 batteries in parallel I will have a combined 20 hour rate capacity of 300 AH.
10% of 300 = 30 amps max.
I said that the 500 watt system would produce more than the batteries could use. NOT that it would "overcharge" them.
500 watts @ 12 volts = 41.67 amps.
41.67 is somewhat greater than 30.......
If I am going to go with the 500 watt solar I will need a battery bank that can take the higher charge rate. Either AGM batteries or larger flooded deep cycle. 4 T105s in series (24 volt system) would be suited to a 22 amp charge rate.
500 watts @ 24 volts= 20.83 amps
I understand that the 500 watt system will only produce 500 watts under ideal conditions but I would think it best not to purchase and install capacity that I cannot use.
