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So Everytime I use my air conditioner on battery (4x330ah lifepo4) I get a low battery/overload light for a split second when the compressor kicks in. Batteries show way above 13.5v
System has 2x 12/2000 multi in parallel so I can't see 50amps from the air con overloading it. Plus I'm using a soft start.
It doesn't happen when I'm on generator or shore power.
Anybody have advice on what's causing this?
Startup or inrush current of a compressor is much higher than normal draw.
You can look at inrush current limiters if it's a concern.
I thought that's what the soft start does? Also why wouldn't it happen on genset or shore power?
Is doesn't happen on shore or generator because the power source is different.
From battery (inverting) you are likely getting DC ripple hence the overload low battery lights.
Have you daisy chained the batteries or are they all on a bus bar?
What size cable do you have? Do you have good tight connection snon fuses etc.
When on generator or shore power the batteries aren't driving the A/C, the multiplus(es) just passes the power through, so no battery warning. Large load on batteries will drop the voltage and cause the alarm.
If there's a soft start, it should be checked or upgraded.
