What size generator to run 4 ton ac unit? Let's talk.

If you're trying to determine what size generator to run 4 ton ac unit systems, you most likely already know that will central air is usually a massive strength hog. It's something to keep your lights on plus your fridge running during a power outage, but trying to keep a 4-ton monster humming in the center of a July heatwave is a completely different ballgame. Many people assume they could just grab the decent-sized portable generator and plug this in, but that's a quick way to stall your own engine or, even worse, fry the delicate electronics in your HVAC system. ...

March 23, 2026 · 7 min · Forrest Rubinstein