Cajunwolf
Solar Enthusiast
What size is your battery bank? I bought four Chins 12-volt 200ah batteries configured into 24-volt 400ah I'm setting up in my RV and want to run my rooftop during the day and a small window unit at night when down here on the coast. This is with 2000 watts of panels. I also have a 4kw dual fuel generator. I'm plugged into 30a shore power at some mom-and-pop RV park a lot of the time.You add a double safety factor there. Fudge Factor + Fuse Headroom.
I'm running my 3000W Growatt with 2 awg wire on a 24V CHINS.
And that thing puts out true 3000w. I can run my 13500BTU A/C unit (1200w running) and a Microwave - at the same time. Sits right a 95% capacity - just shy of 3000W. It even survives the surge of both appliances.
At those 3000W - the battery voltage sits around 25-26V and I'm pulling roughly 120A.
The 2 gauge wire is not even getting warm and a 4 FT run.
your fuse should not only protect the wiring but also the connected devices. When the inverter is designed to 150A - installing a 250A - might melt it internally / burning - instead of blowing the fuse in the case of a short - go with the fuse size the manufacturer recommends
You can use the larger wire if you want to reduce voltage drop- you can have 0/1 gauge with a 25A fuse. But don't go oversize with the fuse.