Gage

Photovoltaic panel gage

The most commonly used wire gauge connecting solar panels is 10 AWG. Why 10-American-Wire-Gauge (AWG) is selected as the standard for external connection of solar arrays due to the following: Consider water flowing through a hosepipe. The lower the gauge number, the less resistance the wire has and therefore the higher current it can handle safely. . The wiring in a solar setup is the lifeblood that carries generated power from the rooftop to your electrical panel. If the wires are too thin or improperly sized, you risk suffering significant energy losses, which directly translates into reduced return on investment (ROI). Results are approximations only and may not meet all local electrical codes, inspection requirements, or manufacturer specifications. [PDF Version]