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erik-j avatar image
erik-j asked

SmartSolar MPPT 100/20 battery settings for Victron Lead carbon 106Ah batteries

Hi,

I have ordered 4x106Ah Victron Lead carbon batteries that I will connect in parallel to a SmartSolar MPPT 100/20.

2x100W solar panels will be connected to the regulator.

A Victron Smart battery sense will also be connected.


What I have been able to read off the data sheet for the battery I should set:

Absorption V to 14.1V

Float V to 13.5V


But I cannot find any information regarding

  1. Re-bulk v offset
  2. Eq voltage
  3. Eq current %
  4. Tail current
  5. Temperature comp

Regards

Erik

battery chargingsmart solar set-up help
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2 Answers
snoobler avatar image
snoobler answered ·

1. preference based. The default is usually acceptable. I prefer a value that results in the resting full-charge voltage like 12.9V for an AGM battery. In your case, that would be 0.6V.

2. 14.1 or disabled.

3. default

4. typically about 2% of capacity. In your case, 424Ah * 0.02 = 8.5A

5. only valid if you have a secondary temperature source like a smart battery sense or BMV-702 or 712 with shared voltage sense enabled.

https://www.victronenergy.com/blog/2019/01/09/lead-acid-battery-charging-in-cold-weather/

-4mV/cell/°C or -24mV/°C for a 6 cell 12V battery.


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erik-j avatar image
erik-j answered ·

Hi Snoobler,

Thanks for your reply.


/Erik

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