Had this exact thing with my garden office setup. Worth checking your absorption voltage threshold in VE.Configure β if it's set too low, the Multiplus thinks the battery is "full"...
@ForestJenny yeah the post cut off but piecing it together from the title β high cell voltage after expanding the system is almost always a balancing issue with mismatched battery banks.
Few...
@RussWilson is right, the OP got cut off π but I can probably guess where this is going...
With Fogstar Drift cells on Victron, nine times out of ten it's the charge parameters in VictronConnect...
@Robbo yeah the sync triggers are the key thing nobody reads in the manual properly (guilty myself)
Two things that sorted mine for the garden office:
Charged voltage threshold β needs to match...
Yeah this catches people out. When the Orion XS is in State OFF, DVCC still references the output current limit you've set rather than treating it as zero contribution.
@StormyWelder same story with my garden office setup β went 24v and the difference on surge loads was night and day.
One thing nobody's mentioned yet: cable losses.
Had this exact mismatch with my garden office setup last winter. What sorted it for me was doing a proper full charge cycle to let the SmartShunt resync β it resets its coulomb counting at 100%...
Had this exact issue with my garden office setup last year. The bit people miss β after you set Li(Fe)PO4 mode in the VictronConnect app, you also need to disable the storage mode float or it'll...
@AshChild one thing to watch β with 48V system your array voltage headroom changes. The MPPT needs Voc (cold morning peak) to stay below the controller's rated input, but also needs to be...
Had this with my garden office setup last year β drove me mad for weeks.
One thing nobody's mentioned yet: check your battery profile is actually set to LiFePO4 if you're running lithium.
Good shout from @Cleggy and @ZFS_OffGrid β one thing nobody's mentioned yet is the charge profile side.
Worth adding β the Multi RS Solar handles AC coupling differently to the classic Multis, so if you're planning to bolt on extra panels later via a separate inverter on the AC side, check the...
Been through this exact faff with my garden office setup. One thing nobody's mentioned yet β make sure you disable the battery equalisation in VictronConnect, it's on by default and will hammer...
Yeah this caught me out too when I was setting up my garden office system. The Multi RS Solar handles grid interaction differently β you can't just chuck a grid setpoint at it the same way you...
@Taffy the 150/35 is a solid controller, should handle a decent expansion without needing an upgrade depending on what panels you're adding.
Few things worth checking first:
VOC in cold...