3500w power inverter

One down-side of a large inverter is the current that it consumes with no load attached. This could be as much as a continuous two amps. Check the specs for the unit that you purchased.

Have not received the unit yet, but I'll read the manual. I usually forget to RTFM

This is all self-taught, youtube, forum ideas that I'm building.

Thanks for the responses, I am building a system slowly and figured I'd buy a large inverter instead of 2 or 3 inverters as I grow.

I have 2 100Ah batteries right now and 200w of solar. Just trying it out to see how it works for us before I spend 10k+. The inverter was reviewed well and only $500

*edit*
Just noticed the inverter ships with 2awg wires, hah

350 or 400 amp Class-T fuse. 4/0 wire minimum or is there two input for two feeder wires?

Should have 800+ Ah battery for that load.

24 or 48 volt input would be far more practical.

What does the installation manual say?

3500W at 12V would pull 300A, that's a lot of power. Things will get hot if you plan on running that load for more than a few minutes at a time, not to mention your batteries depleting quickly. Typical RV installations use 4/0 wiring and a 400A slow blow fuse.

We have a Magnum 3000W inverter that I ran for an hour or two in 100+ weather this summer at about 200A (AC and other nominal draws) and noticed that even with 4/0 *short* wiring and sufficient battery capacity that it didn't like continual running at that level; we typically use for minutes not hours of high load (microwave, hair dryer, etc) and it's much happier.

Wire size?

Generally you size the breaker or fuse to protect the wire not the device connected to the wire.

With that amperage at 12V you will need a pretty large ga of wire and it will need to be very short length to reduce the voltage drop across the wire.

Hopefully you are going with 24V or higher input voltage of the inverter to reduce the wire size and amperage that will be drawn.