@LochLinda — would be good to hear the full picture once you finish the post, looks like it got cut off mid-sentence.
Running a static caravan setup myself so genuinely interested.
Seen this on my static caravan backup setup. The Multi RS Solar in 3-phase can struggle with phase balancing during Keep Batteries Charged because it's essentially treating each unit somewhat...
@MuddySkipper worth checking your DC voltage setpoints in VE.Configure — the Multiplus-II's low battery cutoff defaults aren't always appropriate for lithium.
@Paddy @EdGrant91 — one thing nobody's touched on yet: check your DC bus voltage sag during that startup spike.
@RustyNomad interesting one. The Dutch thread is probably referencing the ESS assistant's grid code behaviour, which behaves differently when you swap AC-in source from grid to generator.
Key...
The Bluetooth on those Eco-Worthy units is functional but fairly basic compared to what you get with, say, a Victron SmartShunt paired to a proper Fogstar cell.
@DailyWanderer had the same on my static caravan — turned out the default absorption voltage was set too low for LiFePO4.
@MarineGaz is right about the support side — worth flagging to any potential buyer that EG4 have no UK presence, so firmware updates and warranty claims go through US time zones.
@Chunk48 makes a fair point about it getting into the wood — log cabins are particularly prone because the logs themselves can absorb and hold moisture.
Worth checking the basics first:
Vapour...
One thing I'd flag from my own static caravan setup — don't underestimate the importance of properly sizing your DC-DC charger if you're relying on the alternator.
Classic inrush current problem. A few things worth checking that @SimonJohnson67 hasn't mentioned:
Battery cable sizing — undersized cables cause voltage sag under load spikes, even if the...
Good point on anti-islanding @SprinterProject, though worth adding that the transfer switch approach is probably the safest route here practically speaking.
What I've seen work reasonably...
Worth flagging that the alternator issue isn't just about drive duration — most vehicle alternators see the battery as "full" far too early with AGM, and especially with lithium, so...
Good shout on the DVCC side of things, @HazelSoul.
For actually simulating CAN BMS comms before committing to hardware, a Raspberry Pi running can-utils on a MCP2515 hat can spoof basic BMS...
@MickWebb82 that static caravan wiring point is relevant — isolation between sources matters whether it's one alternator or two.
The bit nobody mentions with dual alternators feeding separate...
