Panel to Solar Controller Wire Size
As some of you already know, I'm piecing together a solar system. Controller is a Morningstar 45A PWM. Panels will be two 12V 150W wired in parallel. I'm going to be using a combiner box on the roof, ...
Forum Discussion
mena661 wrote:westend wrote:I'm probably going to get this one: AMSolar C-Box.
The 4 AWG will work well for you. All sorts of lugs are available for #4 so connectivity is easy.
You're now getting into what Handy Bob advocates, also. :B
If you're going to use a combiner box, IMO the off-the-shelf boxes are expensive. I made my own but there are also cheaper ways to add two terminal strips into a plastic box.
My DIY box:
I dunno', yes it fits nicely under the lid of the fridge vent but only accepts 6 ga. wire and is expensive for what it is.
Nearly the same thing can be fashioned from a single or double gang box with common lug strips and good box entry clamps. The simple plastic boxes can be screwed to the vent housing or glued to the roof membrane with some sealant or VHB tape.
I used this box entry clamp for two MC4 cables. I sealed the cables into the rubber with sealant, also.
