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steve-2 asked

Float voltage is too high

I have a Victron multi-plus 12-2500-120 inverter on my boat. When moored for the winter, I am connected to shore power (120v) and run a small heater and dehumidifier on board. I set the inverter to "charge only" so that if shore power is lost, the heater doesn't drain down the batteries. The float voltage never drops below 13.9 volts which is too high for good battery life. If I shut off the heater and dehumidifier, then the float voltage eventually drops down to 13.2 volts, which is where I like it. How can I get the float voltage down to 13.2 when it is somehow sensing that there are loads on the system?

Phoenix Inverter
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2 Answers
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JohnC answered ·

Hi @steve-2

Maybe that 13.2V is coincidental to your loads. Could be the Storage mode kicking in. https://www.victronenergy.com/upload/documents/Adaptive_charging_how_it_works.pdf

That may be an older model, but it still should be possible to change the settings within it if you want different levels. I'm unfamiliar, but see here: https://www.victronenergy.com/Manuals/PhoenixMulti/UKISM010054000-rev00.pdf (Section 2)

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steve-2 answered ·

Thank you for your comments. I used the procedure you referenced and i was able to set the float voltage to 13.2. And after a week of watching, it is working well.

Thank you.

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