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Old 10-25-2019
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MRPutz MRPutz is online now
Burnin Up in Az. :-)
Join Date: Apr 2008
Location: Mesa
Posts: 4,109

Originally Posted by Kiwi3 View Post
Kinda an odd problem. My Xantrex 3012 is flipping to 'invert' mode while plugged into shore power and then discharging the new batteries to the low battery cut off point, then beeping like a beeping thing.

I would think it would be impossible for the inverter to drain the batteries as the contactors in the closet are powered by the shore power. I pulled the floor and opened up the contactor boxes and they are in shore power mode (coil energized) so the inverter shouldn't be able to send power to anything. I guess the inverter itself could bring the batteries down over time but it seems way to fast.

I'm going to pull the inverter out in the next few days just to make sure I didn't connect anything to the DC terminals of the inverter that I shouldn't. Good time to clean that compartment I guess. I'll check the resistance across the inverter AC input to make sure the inverter internal transfer switch hasn't failed. The inverter does click constantly when on shore power so that may be it. Joy...
Bruce, just want to clarify a few comments you made.

1) Doesn't the inverter have its own sub-panel? If so the contractors in the closet would have nothing to do with the inverter.

2) Some of the newer inverters have a "feature" so when shore power is lower than expected it will use the inverter mode to make up the difference. You can monitor incoming voltage level and/or turn this feature off in the inverter programming

3) Some inverters power on by "sense" mode. Even if everything is power off something might have a small current draw setting off the inverter. You can increase the setting or disable this option while trouble shooting.

Michael & Tami Putz
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