PWM controller question

BFL13 wrote:

Snowman9000 wrote:
I contend that you should use at least 17v, if not higher, for your voltage drop calculations. A quick run through that calculator shows that 50' of 10 gauge wire will present a voltage well into the 15's at the controller. Good enough for PWM in my book! Maybe the open circuit voltage of 22.x is really the one to use.

I only have a 100w portable kit, 6.x amps. I used 12-2 low voltage landscape wire from the big box hardware store. With Anderson Powerpole connectors at all junctions. You'd probably need to upgrade your tires to haul around all that 6 gauge wire. :)

The voltage on the wire from panel to controller with a "12v" is the battery voltage at the time. The IV curve V is battery voltage.

With "24v" the panel to MPPT controller (when in Bulk) wire is at Vmp maybe 30v, but the wire from controller to battery is "12v" battery voltage. I don't know what the "24v" panel voltage would be when the MPPT controller is in PWM.