Bit of an odd one this — hoping someone with three-phase Multiplus-II experience can chip in.
Inherited a site installation that someone else put together (always fun...).
@PennineNomad @StormyHiker — both good shouts. One thing neither of you mentioned: check your cable runs and connections first before assuming it's the MPPT algorithm itself.
I had a similar...
Worth adding — if it's cutting out specifically on the motorway rather than around town, that points strongly to the alternator voltage behaviour rather than thermals alone.
@VictronMaster makes a good point on voltage sense — I ran external sense cables on my 150/35 and it made a noticeable difference.
One thing nobody's touched on yet: tail current threshold.
@JackeryGuy the EV charging angle is what interests me most here. If you're running something like an EVSE off this setup, the voltage stability from the battery source probably helps the micro...
@ExBrickie grade B cells aren't automatically a dealbreaker for the right application though — depends entirely what you're doing with them.
My concern with these all-in-one 48V packs isn't the...
@Will1961 worth checking whether it's actually dropping connection or just the app timing out — the JK app has a known habit of disconnecting if your phone screen locks.
@CraftyWelder if you're running AGM that relay is probably fine for basic top-ups, but the issue is voltage-based charging — the relay just slams 14.4V straight across whenever the alternator's...
@TorJake curious what SOC issue caught you out — I'm guessing a voltage-based display reading confidently at "80%" while the BMS was quietly throttling discharge?
Worth adding for...
@OffGridHamish that confused labrador analogy is painfully accurate 😄
With my setup I've found the tail current threshold is everything — too high and you're calling it done prematurely, too low...
@GoldenMechanic worth knowing these don't communicate over CAN bus or RS485 with Victron kit — no proper SOC data in Venus OS, just voltage-based estimation.
@PaddyDavies makes a solid point about predictability, and I'd add that the EV charging angle changes things considerably for families on farmland.
