Hey everyone, I’m off-grid and have plenty of spare energy, so I recently decided to lower my charge voltage to 3.45V per cell. Over the past few weeks, I’ve barely reached 60% SOC, and the batteries often sit at 100%. To reduce stress and extend lifespan, I figured lowering the full-charge voltage…

Have you still got 56.0V in DVCC set as the limit, you really need to get to completely stock conditions first, ot will drift a bit each day due to calc errors, meter errors etc. However you synch is not happening because your target voltage is 56.8V and is not being reached. Your last comment was y…

[image] pwfarnell: Your last comment was you set your batteries DVCC 56.0V. Make sure these are matched. In my last comment I found it at 56 after a few days with default settings. Yesterday I changed it to 56,8 [image] zedamoca: I set it now to 56,8V then.No other settings changed. T…

The thing is the BMS asks for 56.8V for 2 hours for absorption after which it goes to 54.8V as float. You can not adjust these, they are hard coded. If you have a setting which is holding the voltage to 56.0V then it can not get to the required 56.8V so it will never go to float. All your changes …

I really appreciate your patience in sticking around. Me too, am out of ideas and I’m also convinced something is still being hold the 56V, and because of that 56,8V can’t be reached, not allowing sync. [image] pwfarnell: the BMS asks for 56.8V for 2 hours for absorption after which it goes to …

By reading this discussion from MPPT getting wrong Charge voltage limit from Cerbo/ESS : [image] MPPT getting wrong Charge voltage limit from Cerbo/ESS And what is show in the (graphical) remote console? Device list → battery → parameters I found my setting is 56V [image] Much probably it’…

[image] MPPT getting wrong Charge voltage limit from Cerbo/ESS What is configured in the settings of the MPPT and MultiPlus? Of course the only thing I haven’t checked was the MP2. But its 1:30 in the morning already, the chances to mess up are high. This is going to be checked tomorrow.

[image] zedamoca: You mean 54,0V as float, right? OK, there is some confusion between the manuals and what is configured in the BMS. I believe that the NG manuals were edited from the older Smart battery manuals and not all data has been captured. The manuals state 13.5V float for a 12V batt…

Battery filled a while ago, 56V, half hour ago. I thought that maybe after changing some settings a full reboot could be needed, but nop… [image] Let me arrive home to look at the MP2 settings. I think I have the MP2 charger disabled, but let’s see.

But did you drop the charged voltage in the BMS settings down from the 56.8V to 56.0V or 55.9V per my note above.

That’s it…”They” want you to fail your batteries so “They” can sell you more….Not. What a nonsensical statement. :angry:

Please fix my settings, 100% sync not happening

DIY

zedamoca 9 June 2025 23:37 25

Of course the only thing I haven’t checked was the MP2.

But its 1:30 in the morning already, the chances to mess up are high. This is going to be checked tomorrow.

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Please fix my settings, 100% sync not happening

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