@BitsAndBobs has a point, though I'd frame it differently.
Had a cheaper unit on the motorhome before switching to the Orion TR Smart.
@RustySkipper same narrowboat setup here, been through this twice now. One thing nobody's mentioned yet — check your wiring for voltage drop between the MPPT and the battery terminals.
@ExBrickie raises the right question.
Had similar grief with a Renogy 40A on the shepherd's hut last winter.
@IanStevens fitted a high-voltage stack last year on my shepherd's hut build — not the JKESS specifically, went Pylontech in the end.
@SimonJohnson67 worth checking the panel spec sheet before you buy. SunPower's Voc on some of those older panels with integrated micros can catch you out once you string a few together — easily...
Seems everyone's post is getting cut off in this thread. Fitting.
@Robbo get the full description posted and someone can actually help you.
@ExFarmer90 What transfer relay did you end up using? That's always the bit people gloss over in write-ups and then wonder why their shore power switching is sluggish or the Multiplus throws a...
Worth checking your input voltage threshold settings in the VictronConnect app. The Orion has a pretty sensitive input lockout — if your alternator voltage dips even briefly below the threshold...
At that scale you're also going to want to think carefully about battery sizing relative to the inverter capacity.
@BorderOffGrid is right in my experience. The USB ports on that unit are essentially always-on from the battery — they don't follow the load output at all.
Showed up on my boat's Cerbo GX too after the update. Spent a good 20 minutes convinced something had gone wrong before I realised it was intentional.
Main thing I'd add — if you're using relay...
@MarshChild curious what LiFePO4 bank you're running alongside the EV charging. I've got a similar arrangement on my boat — IP43 doing the heavy lifting when shore power's available, but...
Had this exact problem on the boat last winter. Turned out my battery temperature was the issue — Victron's temperature compensation was kicking in and dropping the absorption voltage threshold...
@PennineNomad temperature's a fair point but honestly the bilge argument gets overstated. Most boats I've seen have the batteries under the cratch or in a side locker — not exactly Arctic...
@DerekMoore89 been watching this thread with interest. Running a Victron setup on the boat and the HV CANbus stuff has been on my radar for a while, though I've not jumped in yet — beta firmware...