Originally Posted by Unicorn Driver
So if I don't change the cables I need to stick to lower than 1800w.
The 1/0 cable is rated for 150 amps, and hopefully it is fused/breaker at that rating. 150 amps at 12v = 1800 watts.
One of the questions I asked is what is on that circuit? How much power is likely to be drawn on that circuit? There are many units on the market that are 2000 watts, a lot that are 1500 watts and I am not sure how many in between.
In theory if you have proper circuit protection and you know how much power you will will be using you potentially could go with a common available 2000 watt unit. I will give you an example below.
In my tow vehicle I just purchased a PSW inverter. I ended up purchasing a 2000 watt model. I have not installed it yet, but it is likely I will only be using 4ga wire which is only good for 100 amps or about 1200 watts. I will be doing this because I have a lot of 4ga wire and fittings and routing is easier.
In my TV it will mostly just be running a CPAP a couple of times a year. Maybe some battery charging for power tools. It would be nice for it to run my very small microwave, but that is not a deal breaker for me. I have to have the microwave for my title as a motorhome, but I have yet to use it in 2 years.