Calculating Wire Size For Solar Panels

Read our wiring post to determine the proper wire size for your build.

Calculating wire size for solar panels.

Use this to determine the right cable for your solar panels be safe and save money. Calculated wire diameter in inches or cable wire size in mm2 and rated maximum ampers for power transmission if cables are wired in a bundle or maximum amps for chassis wiring if each wire is routed separately. The cable should withstand maxumum current in a always choose cable type that satisfied both conditions. Here is what that calculation looks like for a 12v pv system.

To use the wire size calculator just follow these 4 simple steps. We then go ahead and calculate the 110 125 of the maximum controller rating to get a range of 1584w to 1800w. For example solar array peak power in w or kw cable s working temperature in celsius or fahrenheit. Enter the distance in feet from your solar panels to your battery bank charge controller.

Solar sizing calculator allows you to calculate your energy consumption and requirements to help you decide on your solar panel requirements. 60a 24v 1440w 1 1 or 1 25 1584w 1800w. 12 39 28 471 36v. The complete calculation looks like this.

This solar panel wiring size calculator lets you to work out the gauge of wire to safely take the solar dc power from a set of solar panels. Calculate in series and parallel wired pv solar panels. In step 2 we calculated that maximum string size to keep the inverter operational. Solar panel kits eco worhty 600w solar kit eco worthy 800w solar kit fuses and wire gage size are going to vary depend on how long your are running the wires.

Let s take a 450 watt 12v system. You can double the length for a 24v system or quadruple it for a 48v system. Enter the total amps that your solar panels will produce all together. 9 november thomas karli reis allgemein designing string serial modules.

For that take the max string size calculated in step 2 12 panels and multiply by the vmp of the panel 39 28. We want to double check that this falls within our peak efficiency range as well. Cable wire size needed in mm2 cross sectional area wire diameter in inches. Using the known resistance of the various wire gauges it is possible to calculate the maximum length for a wire pair for each wire gauge size.

Usually 12 24 or 48 volts. To calculate wire size just enter solar system working voltage in v or working voltage over cable wire for example if this cable connects the battery bank to load add the voltage of battery bank expected working peak power.