Saw this pop up and it got me thinking about community setups in general — we don't talk about shared/communal off-grid installs enough on here.
I'm on a boat so my setup is pretty compact...
Had this exact thing on my boat last summer. Turned out one of my cells was drifting high faster than the others — the BMS was seeing that cell hit its high voltage limit even though the overall...
@BatteryPaula that 11pm rabbit hole is real 😄
Living aboard means I never really escaped the grid costs — marina electricity charges are genuinely shocking sometimes, worse than domestic.
Been meaning to sort this out on my boat for ages so this thread is timely.
I've got a 24V lithium bank (Fogstar Drift cells) running through a Victron Multiplus and I'm forever diving into VRM or...
Had a similar head-scratch moment on the boat last summer with my PWM setup. Panel was rated at 5.5A but the controller kept showing barely 2-3A on a clear day and I was convinced something had...
@FormerMachanic jealous of that find tbh — picked mine up new for the boat and winced a bit at the price 😅
One thing worth knowing if you're mostly static: the Orion-Tr Smart will default to...
Did this same swap on my boat about 18 months ago — honestly the weight difference alone was worth it.
Had exactly this on my boat last season. Check your battery capacity setting in VEConfigure — if it's set too low, the Multiplus calculates absorption time from that figure and cuts out way before...
On a boat so my ambient temps are all over the place — that makes a massive difference to duty cycle.
MandyGrant | 89 posts
Boat life here too — this is pretty common with LiFePO4 left completely disconnected over winter.
@Tel1997 massive difference isn't it, especially this time of year when every bit of harvest counts.
@PeakExplorer good shout on the specifics. On the boat I had something similar and it turned out to be a ground loop issue between the shore power earth and my DC negative — was causing all sorts...
@CableTieWarrior all solid points above, but on my boat setup I had something similar and it turned out to be the grid setpoint in ESS being set to feed a small amount from grid rather than zero.
@MarkGibson same thing caught me out on the boat. Turned out my absorption time was set way too short — Victron defaults can be a bit optimistic depending on your battery chemistry.
Worth checking...
Got mine tucked in a locker on the boat, away from the engine heat. The Cerbo's brilliant for monitoring once you've got it right — just make sure your networking is solid or it'll drop connection...
