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
Salvo wrote:
Here's a mppt controller for $48 including shipping. Voc = 75V
Qianqsun mppt
For $48 you can go serial, keep your existing cable and just swap out the controller. In addition you'll get 5% more current.BFL13 wrote:
The $102 Eco-Worthy 20amp MPPT is the lowest cost "real" MPPT but it can only do about 42-45 Voc input limit, so it can do one big panel (250w max?) but not two 12v panels in series. (22 +22=44)
So the money does not work out for going MPPT in this case just to be able to use some skinnier wire.
Salvo, AFAIK that is a version of the Solar30 PWM controller. It has no inductor etc in its circuit board and somebody painted MPPT on it.
There are several of these "fake MPPT" controllers going for low cost. They are just straight PWMs that work with 12v panels
JiminDenver sometimes finds Eco-Ws going for less than the usual $102 at maybe $85 or whatever but that is the only case I know of less than $100
