7 hours without power.....

[Okguy]

Originally Posted by ElGuappo

i need to run 2 heaters and 3 pumps min.

That sounds a bit excessive. Can't you try a test this weekend to see what happens if you run your tank on 1 pump, 1 battery operated aerator and 1 heater. For a tank to survive (not thrive) for short periods of time it only requires oxygen and heat (remember most corals\fish are transported a lot further than that via airplane with less than that). I bet a Noma UPS could work for you. I've had mine run for 12+ hours with just one Nano stream and one heater. Plus one of those battery powered air pumps. If it looks like the UPS is about to lose power you could always recharge it with your car inverter.

HTH

Kevin