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captdaveo's avatar
captdaveo
Explorer
Jul 20, 2024

Running A/C over draws the batteries causing inverter alarm

I'm trying to run a rooftop A/C unit that draws 10.5 amps at 120V = 1260 watts. I have a 2000 watt inverter connected to a 430 amp hour battery bank using 18' of 2/0 stranded cable. This should be ...
time2rollagain's avatar
time2rollagain
Explorer II
Jul 22, 2024

How old are the batteries?  Have they been consistently charged to 14.4 to 14.6 volts?  I believe the lead-acid batteries may have lost some capacity and while not dead they cannot hold the voltage up.

Otherwise I recommend 600+ Ah of lithium battery as a replacement if expecting to run the A/C for any length of time.

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