Cable Size Between Solar Panel To Charge Controller

Estimated cable length 12 4m needed for connecting the solar array to the next solar power system unit for the example charge controller.

Cable size between solar panel to charge controller.

The exception b is when the charge controller is of the type that can operate a 12 or 24 volt battery bank even when the pv array is operating at higher voltages such as 48 vdc and. From the solar panel specification sheet vmp 36 7v and imp 6 94a rounded off to next higher number i e 37v and 7a. For example five 100 watt panels in parallel would be 5 29 x 5 26 45 amps. A typical recommendation is to limit the solar array to 110 125 of the maximum controller rating.

Or 200w 300w or 400 watt solar power system. The 5 pairs will be wired in parallel where the current adds to give you 5 sets times 5 amps per set equals 25 amps. We recommended a factor of safety of at least 1 25 meaning you would multiply the current from your panels by 1 25 and then compare that to the 30 amps. What size charge controller for a 100 watt solar panel.

Enter the 25 as the maximum amps your wires need to carry. Or more than that. We then go ahead and calculate the 110 125 of the maximum controller rating to get a range of 1584w to 1800w. That means we have 1440w of power.

We get calculated that we need a copper wire of 0 128 diameter in inches and a recommended maximum current of 29a defined by choosing solar system voltage. You have a 60a mppt charge controller and a nominal 24vdc battery. By using the above values in the online calculator by renogy the cable size is 12 awg. If you have 3 solar panels rated at 6 amps each mounted 30 feet from the charge controller then you would move down the chart to 18 amps 3 panels 6 amps and across to 32 5 closest to 30 and then up the chart to 4.

A charge controller installs between the solar panel array and a battery bank description below there is a simple way to figure out the size its rating. Step 3 this is the distance in feet from your solar panels to the charge controller and battery bank location. The wires from the charge controller to the battery bank can generally be the same or larger gauge than the main set from the pv array. 26 45 amps x 1 25 33 amps and would be too much for the controller.