time2roll wrote:
profdant139 wrote:
Very interesting points about moving the controller -- I will have to experiment with that to see how much difference it makes.
Panel is probably 18 to 22 volts and is cut to 14.x at the controller.
If the 18 volts drops to 15 through the wire to the controller it may not matter much as the controller will still put 14.x on the battery.
If the controller is at the panel you have 14.x going through the long wire and limiting power to the battery.
for a PWM controller at the battery, as long as voltage drop doesn't get down to below around 15V drop will have almost no effect on charging current. For a MPPT controller output may drop some due to the power loss in the cable that the MPPT controller normally could use. Worst case MPPT controller will end up delivering the same power as a PWM controller when the voltage drop gets big enough.
