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So, he's back and fixed it. As probably mentioned, we were in a bit of a rush when reassembling the battery pack, as we had some flights booked from a different location and needed to get there in time. Turned out that one of the BMS measuring cables had been connected wrongly, which in turn...

Thank you very much everyone. I have decided to disassemble once more in a few days when my partner is back and then sand all contact areas as well as using an aluminium contact grease before putting it back together. Looking at the replies it seems very likely that it's predominantly the...

Just a quick sidenote, I reply more later. ABYC has zero relevance to me. This is not in US waters, neither is ship or crew from or in the US. The whole system is built with a minimum budget. There is no fancy Victron or similar stuff in there. Allmost all parts are from Alibaba. The system...

Did you see my reply message 11 it has the requested measurements you asked for. What do they tell you?

Thanks. Bus bars are aluminium. Bars showed no visibile corrosion on assembly. The bars worked fine over the last 2.5years. Clamp meter and Voltage /Amp meter are available. Measured cells in connected state, as requested earlier. Values are posted. Still waiting for conclusions from the guy...

No need to be confused, I hook the PC onto the Epever and made a picture of it. Btw. I'm at anchor in Malta (Europe).

I checked if anything is not tight or feels warm. Just got of the phone with the person who assembled the battery initially and did also the disassembley and reassembley. He said on the very first assembly he sanded all bus bars shortly before connecting them. On the recent reassembley he only...

Agree, but this is due to space constraints.

Yes, for redundancy each panel has its own. We are often offshore.

Unfortunately I don't have a history. Still, I do know that we easily had full batteries every day before disassembley. We could cook dinner without problems. We are located in the southern Mediterranean so, plenty of sunshine. The battery does take charge 20A from the Waeco, but not from...

Very true, and yes I see that happening. Including a voltage drop, which obviously leads to the higher amp draw then. How do I charge to the 14.2-14.4V suggested earlier in post 8 with my solar then? What do you make out of my Voltage readings for the cells?

Additional info, just switched the genset off as well as all discharge sources: Epever Battery Outlet13.6V 1A per Panel Full sun. Batterie Indicator 13.56V Charging +1.67A SOC 66.8%=561Ah When the Waeco is running I get 20A in. It's supposed to deliver up to 50A. 😢😭

Here the cell measures and more. Cells were measured with all charge and discharge sources off. Main busbar were connected. Cell closest to negative measured first. One 3.315V Two 3.315V Three 3.315V Four 3.313V Five 3.313V Six 3.312V Seven 3.313V Eight 3.314V Nine 3.315V Ten 3.313V Eleven...

Thanks. Lying awake while I read this. Any thought why it takes charge from the Waeko/Genset but not from Solar? If it needs more charging now I'd need to use the Waeco/genset. Before disassembley it charged well via Solar. No change in Epever parameters.

Thanks you (and the others). Will do that tomorrow morning. Two questions though. Should I switch charge and discharge sources off while doing so? Do I need to disassemble (remove all busbars and wiring) everything for that? I hope not but fear so..

Thanks I went through that already...

PARTS 3x Trina Solar Vertex S 400w Panel 1x Rutland 1200 Wind generator 3x Epever Tracer 4210 AN MPPT 40A 1x Waeco Perfectcharge MCA 1250 50A 1x Daly 400Amp (non smart) BMS 1x 840Ah LiFePo4 12V battery pack, build with 12x 3.2V cells 1x Lead acid 12V starter battery 1x Flamezum...