Cptnvideo and MN Ron,
Tech support told me they do NOT recommend running an air conditioner from the Magnum 3012.
Others reported good success using a Victron inverter/charger.
I saw little if any difference after getting the MicroAir.
I did one quite short test with the Magnum on load support with generator and autoformer. I may have been unfair because I had limited generator input to 23 amps. The test showed no significant improvement. I've not been where I would wish to run the air conditioner since that time (covid rules us, unfortunately).