[rich2468]

Originally Posted by Bill

Rich -

I'm not sure where the 1200 watt figure comes from. In 2007, I think TM was using a Coleman Mach 13,500 BTU unit, which seems to require at least 1800 watts when running. Adding a true-sine inverter efficiency of 85% (admittedly a SWAG) ups the ante to around 2100 watts.

I think I found the YouTube channel you mentioned, but although it is titled Solar and A.C. Upgrades, I can't find anything about the air conditioner. Are we on the same page?

All your other points seem spot-on.

No matter what, it is a lot of power.

Bill

Hi Bill,
That's first hand experience.

When watching my battery monitor live as I turn on and cycle through my 2021 2922KB's stock Air Conditioning running through my Inverter I see the following:

1180 Watts with the AC on high, 1020 Watts with AC on low, 197 Watts fan high, 131 Watts fan low.

The reading I'm seeing is straight from my battery bank (so Inverter losses are accounted for).

Matt Carver (YouTube the Critter and the Butterfly) just covers his Lithium upgrade and adding the auto switch-over. His Inverter is not large enough to run an A/C. Mine is; I have a 3000 Watt pure sine wave inverter.