150/70 MPPT Equalization current percentage not working

DIY
,
1

Max charge current was set to 70A
Equalisation current percentage was set to 10%

After completing absorption, the mppt was placed into a manual equalization. According to the settings (10%) the current should have been limited to 7A, but the current was not being limited by the equalization current percentage. I tried changing the equalisation current percentage multiple times over to no effect, in the end I had to change the max charge current to limit current for the equalisation process.

I believe there is an issue with the mppt itself or the software (most recent version 6.18)

Screenshot_20250703_133547
Screenshot_20250703_133547720×1600 155 KB

max charge current 70A
Equalization voltage 56.4V

Screenshot_20250703_133555
Screenshot_20250703_133555720×1600 166 KB

Manual equalization in progress as inferred by the “Stop” option

Screenshot_20250703_133521
Screenshot_20250703_133521720×1600 80.9 KB

Charge current 24.9A (should be max 7A)

2

Does the battery need equalization? If you do need to use it you could drop the max charge current to 7A till you find a fix.

3

I already stated that’s what I did/had to do. I’m here to warn others and for Victron to acknowledge and fix the issue.

4

Looks like you’ve got it all sorted! I can’t imagine there are too many people still running 48V lead-acid systems these days.

5

What does battery chemistry have to do with this discussion?

Where does it say the setup was using lead-acid?

The equalize function can be used to limit current after absorption for the purposes of balancing LFP, that’s what I was doing.

6

Just to clarify we’re not really having a discussion here. You made a statement about a fix you found, but when I asked whether your battery actually needs equalization, you didn’t respond. Equalization is only necessary for lead-acid batteries, which is why I asked in the first place. If you’d answered that, we could have had a proper discussion about it.

7

see

8

I hadn’t thought about it that way. Here’s a post I put up the other day. I use Node-RED to drop the DVCC charge current to 2A when the battery reaches 99%. It also gradually reduces the charge current from 100A down to 20A as the voltage rises from 13.6V to 14.2V. I’ve got a bunch of 12V batteries in parallel, and they take ages to settle. This setup works well just another approach to consider.