Limited

The solar panel current needs to be limited

The 120% rule is quite straightforward: it dictates that the combined amperage of your solar power and grid electricity cannot exceed 120% of your main service panel's rated capacity. Ignore it, and you're looking at potential overheating, failed inspections, and some very expensive headaches. Follow it, and you've got a. . TL;DR – There are actually two “120 % rules” in solar. Understanding both. . Some key points about current for solar panels: Short Circuit Current (Isc): The maximum current your panel can produce in perfect conditions. You'll notice that solar panels are rated in watts. Consider your inverter placement carefully.

[PDF Version]