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
Assuming you're connecting the panels in parallel, the distance is 35' one way and PWM controller then 10ga would give you a 1.5V drop plus the additional drop to the battery.
You might want to consider a combiner box and then 8 ga to the controller. You should get more information if you post all of the details - controller type, panel specs and all involved wiring lengths and existing wire size.
You might want to consider a combiner box and then 8 ga to the controller. You should get more information if you post all of the details - controller type, panel specs and all involved wiring lengths and existing wire size.
