System is Victron Batteries, Lynx BMS, Cerbo GX and dual 24v 3kva Multiplusses. The batteries are 4 330AH 12V batteries in two strings of 2 for a 24v nominal voltage.
This is on a boat with a solar array and connected to shore power.
We drew the batteries down to about %75 SOC before connecting shore power. While connected to shore power the solar was not being used at all. So we installed ESS onto the Multipluses following advice.
Now when connected to shore power, the Solar produces its max energy (it seems) and the Multiplus is inverting and charging as necessary.
But at night. the Multiplus charges VERY slow. Took something like 12 hours to put in 4kwh which could have safely been done in 2 hours?!
For example, nothing from PV, input limit from shore power set at 18A (2kw) and the battery at a %75 SoC the Multiplus only charges at a few hundred watts, like 200w. This took forever to bring the battery back up to %100. The Multiplus shows "absorption" light as on.
The Lynx BMS has CVL set at 27v and that's the voltage so I think the batteries are maybe at 27v and so there's not much current flowing.
The batteries didn't get down to the %70 threshold set in the Lynx BMS so it didn't start a "new cycle".
So, I guess I understand what is happening, I'm just not sure I like it. I would have hopped the batteries would be charged at 1500w or some reasonable percentage of the shore power current limit unit they were near full.
Maybe I should set the threshold in the BMS to %95?
I do like the idea of fast charging to %95 then trickling from there.