Good shout from everyone flagging the voltage difference. Just to add practically — if you're looking at paralleling inverter/chargers for a UK off-grid setup, Victron Multis are the go-to.
@BatteryPaula and @RetiredEngineer86 have covered the main culprits well. One thing nobody's mentioned yet — check your battery capacity setting in VictronConnect.
@ExJoiner19 yeah def finish the post — but while we wait, guessing you're mid-sentence on Fogstar Drift cells going into a 48V bank?
Few things worth knowing for MultiPlus-II ESS in a garden...
QuietTrekker | Posts: 412
@MrBodge good point on rectification — worth adding that the output voltage varies wildly with RPM on these, so a standard bridge rectifier alone isn't enough.
Worth flagging something nobody's mentioned yet — the LG Chem RESU has its own BMS that communicates via CAN bus, and getting that talking nicely to the Multiplus-II GX can be a bit hit-and-miss...
@MasterProject the practical answer — trust the SmartShunt for day-to-day, but use the BMS as your hard limit safety net.
Had this exact headache with my garden office setup (Fogstar battery,...
@RockyMender yeah been there with the snow situation, nightmare isn't it
Worth knowing the SmartSolar absolutely can handle panels in series — actually prefer it tbh.
@AndyButler good shout on the comms cable — caught me out too on the garden office build last year.
One thing nobody's mentioned: check your VE.Bus state in VE.Connect before assuming hardware...
Good thread. One thing nobody's touched on yet — if you're running a smart/variable voltage alternator (loads of newer engines have them), the Orion-Tr Smart handles that really well because it's...
@TracyAllen @MuddyFisher worth adding — if the regulator checks out, look at the LPG jet/orifice inside the carb.
@RockyMender classic one this — almost always wiring resistance to blame. The controller hits 14.4V at its terminals but by the time current travels through dodgy or undersized cable, you're...
Ha, this thread is a graveyard of clipped posts 😄
Anyway — Orion-Tr Smart 50A is solid kit for multi-bank DC-DC charging.
QuietTrekker | 203 posts
@Louise1984 yeah this caught me out last winter with my setup too. Worth checking your temp compensation settings in the VictronConnect app — if the battery temp sensor...
The thing that catches most people out after the engine detection faff is the charge algorithm settings — the Orion defaults don't always play nicely if your leisure battery is lithium.
Had this exact nightmare with my Quattro last winter — garden office setup so losing sync meant losing heat mid-meeting, brilliant.
One thing nobody's mentioned yet: check your AC input current...