Friday, May 12, 2017

[Electric Boats] Leaving AGM batteries

 

Sorry about no boat content but kind of has to do with a "land boat". I'm building a house on St Thomas and rigged a 360 watt solar system feeding 2 105 amp hour 12 volt AGMs in parallel. Left for 2 months, came back to a fault light on my MPPT solar controller and 11.2 volts in the bank. My guess is the controller tripped shortly after I left and between the very small power it and my Victron battery monitor use drained down the batteries. Got the batteries back up now to 12.6 volts open circuit, but I have to leave now for another 2 months. Going to buy a Victron MPPT controller in the interim, but am afraid to leave system powered again. I can pull main breaker and disconnect batteries while I'm gone, or take a chance old controller will trip again. There's no AC power on site to trickle charge off of. Any ideas on best course?
Thanks,
Jerry Barth



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