Hello i have installed this system on my boat. See drawing.2022022401 - Bootschappen-1.pdf
Quattro 12/5000/220, solar MPPT’s, lithium batteries, VE.bus,Cerbo.
Purpose: To use as much solar energy as possible, and only use the shore connection or generator when no sun or too much energy needed.
Problem: When I connect the shore connection the quattro starts charging immediately to 100% SoC and keeps the batteries full, so no solar power harvested. Offcourse I disconnected the shore cable, and for a couple of days we used solar energy, but this night the alarm went of and the complete system had a shutdown at 40% SoC. When connected the shore cable, the quattro immediately charged the batteries to 100%. I have read about ESS, but it is stated in the manual that this should not be used on boats...
Solution where I am looking for:
- In case of shutdown due to low voltage, the quattro only charges enough to keep the 12 volt system running and keeps the batteries available for harvesting solar energy.
- Shore connection keeps available at all times, except when sailing, for if there’s no sun for longer periods.
Question:
- How come that it shuts down at 40%, lithium is supposed to be used until 5% right?