Wire Gauge Required Question
For some reason I just can't understand the various wire gauge tables, and I have tried to, so I am hoping somebody will take pity and do all the work! :) One table that I can follow says that for...
Forum Discussion
BFL13 wrote:
Ok.
What about the IV curves? With the 12v you start to lose on the Isc as battery gets up into the 13s, which is fairly soon, but it is not by a lot till you get to 15v
The Isc for the 230w panel goes on forever it seems like to 30v and doesn't the MPPT controller isolate the panel from battery voltage anyway?
But if your amps with MPPT are panel watts/battery voltage is that a wash? Or do you keep your amps up better with MPPT as batt voltage rises from 12.5 to 14.5?
Think of it this way, a PWM controller cannot generate increased battery voltage so once the panel voltage falls below the required battery voltage, the charge cycle quits.
Since the MPPT controller can accept higher panel voltages, the controller can continue to deliver power as long as the panel voltage is above the battery voltage.
This equates to longer charge times for the battery bank.
