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Old 31-08-2021, 00:16   #1
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Charging new VETUS VEDC110TC deep cycle batteries

I have a Cristec YPO12-60ST on my boat that was installed in late 2018.
I have purchased 3 new Vetus VEDC110TC deep cycle lead-calcium batteries for my boat. When I asked Vetus how I should charge them, they pointed me to Vetus chargers and on page 38, they show what "deep cycle" means for them:
https://www.vetus.com/media/magentom...20130956_0.pdf
Boost/CC/CV: 14.7 V
Float: 13.8 V

I reached out to Cristec about how I could set their chargers to the right voltage, and they pointed me to their manual and told me to use AGM settings:
Boost/CC/CV: 14.4 V
Float: 13.6 V

I do not think that maintaining my batteries using lower voltage settings is going to be good for them.

The charger has other fixed combinations:
#1 (the one I'm currently using)
Boost/CC/CV: 14.4 V
Float: 13.8 V
Max boost duration: 2H
Max absorption duration: 4H

#2
Boost/CC/CV: 14.8 V
Float: 13.2 V
Max boost duration: 2H
Max absorption duration: 4H

#3
Boost/CC/CV: 14.5 V
Float: 13.7 V
Max boost duration: 2H
Max absorption duration: 6H

If I continue to use the Cristec to charge my batteries, which of those settings would make sense to use (does the most good). Or, am I faced with replacing it with a Vetus charger that does exactly what it is supposed to do?

Any help would be appreciated.
thanks,
Ken
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Old 31-08-2021, 02:42   #2
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Re: Charging new VETUS VEDC110TC deep cycle batteries

Update 1 from Cristec:
- they say their charger is only accurate to +/- 0.2V, so what happens in practice with the batteries would need to be checked with a DVM to see what the charger is actually doing.
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Old 31-08-2021, 04:24   #3
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Re: Charging new VETUS VEDC110TC deep cycle batteries

I don't think I'd be unhappy using Cristec's 14.4/13.6V recommendation. Slightly lower voltages won't hurt the batteries even if it takes slightly longer to charge, whereas higher -- especially float -- voltages than recommended by the battery maker wouldn't be great.

You could ask Victron for their take on it, if you haven't already.

-Chris
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Old 31-08-2021, 07:09   #4
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Re: Charging new VETUS VEDC110TC deep cycle batteries

Good idea about checking with Victron
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Old 31-08-2021, 16:55   #5
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Re: Charging new VETUS VEDC110TC deep cycle batteries

If you purchase another charger I would suggest a Sterling Pro Charge Ultra.
Available from 10 to 60 amps.

https://sterling-power.com/collectio...ttery-chargers

Not only do they have multiple settings but they also are fully programmable for any voltage you wish.

Not sure who makes Vetus chargers - Vetus is a re-labeller and do not produce their own products.
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