March 24, 20242 yr Ooookay, so I just spent several days figuring out what was happening here. I used to have a Lead Acid battery connected to my Victron Multiplus 24/800/16. Because I'm in the middle of renovating I had the Multiplus lying on top of the batteries (well insulated, of course) and this worked fine. Then I replaced the Lead Acid batteries with a new LiFePO4 one (BlueNova) and things went haywire. As soon as the charge voltage began to approach the boundary between bulk and absorption charging, the Multiplus started to switch back between mains and inverter about every 30-60 seconds. I changed settings until I saw blue in the face but nothing worked. Then I happened to take the Mulitplus off the of the batteries and put it down on the floor beside it. The problem immediately disappeared. So now I feel really stupid. The LiFePO4 battery contains a BMS (read: electronics) and whether it's inductive (transformers, choice coils, what not) or capacitive coupling, the electronics in the Mulitplus and the battery began to influence one another. Not sure how but the effect is now obvious - in hindsight. So here's some advice from a noob: keep your LiFePO4 batteries well away from other electronics. Hand me the stupid hat, will you?
March 24, 20242 yr Well done for figuring that out in the end.👍 Sometimes "unconnected" things can keep you going in circles for a long time. Shame on Victron for bad shielding though. Oh, and welcome to the forum. Edited March 24, 20242 yr by TimCam
March 24, 20242 yr Author Thanks. I figured there's no better intro than to make it clear i'm so green I need mowing!
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