What gauge wire?
I'm going to be adding a second solar panel and need to know what gauge wire I need for 2/140w panels on a 35' run. Thanks Keith
Forum Discussion
I wired all of my solar with #4 welding cable (about $1/ft.). I terminated everything with good lugs I bought at an electronics surplus outfit except for the connection terminals to the controller. For that, I sourced spade terminals from an online car audio supplier.
The cost of the wire is trivial compared to the installation labor and the anticipated loss of power with smaller wire throughout lifetime of the system. Using small wire for solar is like buying cheap paint, it's a false economy.
The cost of the wire is trivial compared to the installation labor and the anticipated loss of power with smaller wire throughout lifetime of the system. Using small wire for solar is like buying cheap paint, it's a false economy.
