Cable Size Between Solar Panel To Charge Controller

Or more than that.

Cable size between solar panel to charge controller.

If multiple panels are combined in parallel then a three to eight awg combiner wire set is generally needed to safely transfer the power to a charge controller or gti. 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. 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. We then go ahead and calculate the 110 125 of the maximum controller rating to get a range of 1584w to 1800w.

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. What size charge controller for a 100 watt solar panel. 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. Estimated cable length 12 4m needed for connecting the solar array to the next solar power system unit for the example charge controller.

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. Let the distance between the solar panel and the battery is 30 feet and the expected loss is 2. By using the above values in the online calculator by renogy the cable size is 12 awg. 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.

From the solar panel specification sheet vmp 36 7v and imp 6 94a rounded off to next higher number i e 37v and 7a. Or 200w 300w or 400 watt solar power system. A typical recommendation is to limit the solar array to 110 125 of the maximum controller rating. Step 3 this is the distance in feet from your solar panels to the charge controller and battery bank location.

Enter the 25 as the maximum amps your wires need to carry. That means we have 1440w of power. 26 45 amps x 1 25 33 amps and would be too much for the controller. For example five 100 watt panels in parallel would be 5 29 x 5 26 45 amps.