12v? 24v? 36...48v????
I'm very near to picking up a new travel trailer that I intend to pack with solar and LiFePO4 batteries. It's a 30A 120VAC RV. I understand the electrical wiring advantages of the higher DC voltage ...
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2oldman wrote:StirCrazy wrote:That would be unusual. Many controllers will take up to 150vdc input. It's the output at 48v that might be a little more difficult to find.
I haven't seen a 30amp mppt that will take a 48v input,
I know residential type ones have large inputs and outputs, but isn't the 150Vdc based on the open circut voltage not the operating voltage to insure it won't damage the controler if there is an issue? at least thats how it was expalained to me so if that is wrong please let me know.
my controler for example has a 100V input but it is rated as a 24V in working voltage, but we all know a 24V panel doesnt put out 24V, for example my 325watt split cell panel has a operating voltage of 33.5 and a open circut voltage of 40.3V. so with my controler which can handle upto 100V input that means I could do two 24V panels in series but not three. although there is no advantage to me doing series on a MPPT, aside from keeping my wire size as small as I can.
that wouldn't be a big deal for me to setup as it is only a 8 foot run, and I believe I oversized it to start with incase I did add a second panel.
