Westinghouse i4500 Generator
I posted a few weeks ago about trying to run my AC with a Yamaha 2k genny and Magnum 3000W boost inverter. Sort summary - the Yamaha just wasn’t strong enough with surges to work. So now I’ve pur...
Forum Discussion
MNRon wrote:
* i4500 should have plenty of guts to start the AC but the Magnum kicks it out and doesn’t let it bring AC up on own
* If I put magnum in load support, or start on Magnum and then try and bring genny in, it Overload Faults and indicates about 400A draw
One AC unit?
Two AC units?
400A at 12.8V is 5120W, 5120W at 120V is 42.7A (not accounting for conversion losses)..
i4500 is only rated 3,700W (31A) continuous, 4500W (37.5A) surge
Your magnum is only rated 3KW and your trying to make it start and run a 5KW+ load..
Everything pipelined (two AC units plus other loads) through the magnum is going to put the magnum into fault mode.
Two AC units plus any other loads is simply way too much wattage no matter how you try..
Your gen is not enough wattage to reliably start and run two 13.5K BTU AC units as it appears to be what you are attempting.
If you are only trying one 13.5K BTU AC or one 15K BTU AC, then you may have an issue with said AC unit and/or too much other loads.
As far as Magnum being used as load support, you would have to limit or turn off the charging current while it is supporting additional load since that charging current becomes additional load to the gen.
You could try splitting off one AC unit and connecting it directly to the gen via 20A outlet and the RV through the 30A outlet.. but I still suspect you have more load than the gen will handle.
In reality, you would need a gen of 5Kw+ which typically lands you in split 240/120 gens and you would need to set up your RV with a 50A 240/120V panel.
Another way is 3Kw+ of solar panels to independently charge the battery bank and run the magnum plus one AC unit..
You cannot get something from nothing and in effect that is what you are doing and is called "over unity" or "perpetual machine".
