Need help with wire gauge/fuse amperage
So I finally got the inverter I think we'll need. Now I need to get another 100 ah 12v battery and the wiring/fuses and I think we'll finally be able to get this going. I have been doing a lot of research on what we need and it's just really confusing to try to find what's relative to our specific components so I figured I'd just try to find someone that knows this stuff and can maybe explain the why and how so I can better understand it.
To start off, let me say what we're trying to power:
The absolute required loads are two small Criterion 5 cu ft chest freezers from Menard's. The thing is, one is going to be overridden with a temp controller and used as a fridge so it shouldn't eat as much watts as the actual freezer one. Aside from that, we might use the batteries for a strip of lights (30 watts) for a few hours a day or a small fan (5 watts) for a few hours a day as well. We run a gas generator for our usual stuff (a/c, internet, projector, Bluetooth speaker, etc) so as far as trying to run something 24 hours a day like a freezer, solar is going to be the way to go so it's gonna be sort of dedicated to that.
Now on to what components we have:
- 2 x 200 watt Grape Solar panels (however 1 got shattered and I'm in the process still of testing it for its efficacy)
- 40a Grape Solar Comet PWM charge controller
- 1 (only 1 right now but the goal is to have 2 and then probably 4 later on but them being $180 each is a bit hard on the budget) Universal Power Group 100ah 12v SLA AGM (UB121000)
- GoWise Power 1500w PSW inverter (PS1005)
- 15' of 10 ga wire with MC4 connectors
- 2 x 20a inline MC4 fuses
Now for my questions/concerns:
I understand that there are four connections we need to make:
Panels - charge controller
Charge controller - batteries
Battery - battery (in parallel)
Battery bank - inverter
So far I'm about 99% sure that I have the panels to charge controller figured out. The panels and controller came as a kit and included the 15 ft of 10 ga wire as well as the 2 20a inline fuses. It said in the manual to cut the cable in half which would be 7 1/2 ft and to hook it all up with the inline fuses on the positives from the panels so I'm hoping that that is correct. The other connections however, I can't figure out. I don't know what wire gauge to go with as well as what fuse amperage to get. As far as wire distance and what not, I plan to have all the components within 5 ft of each other except for the panels to controller which will be the provided 7 1/2' most likely.
Any help or information to finally get this done would be extremely appreciated. This whole pv stuff has been something I've slowly been trying to research for the past year due to money issues and time issues (as always). The wife needs a freezer already and for the past couple years we've been living out of a little cooler having to buy bag after bag of ice especially in the summer (we live off grid). Really eats up the wallet and we also have our first baby on the way so I'm trying to get this figured out! Thanks guys!
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