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Had this exact problem when I first set up my motorhome. Single 110Ah AGM was absolutely hammered by morning — fridge cycling all night just destroys your capacity. Few things that made a real...
@DaleVicky 800W at 5am with nothing running? Either you've got a very ambitious ghost or your immersion heater decided to develop sentience and treat itself to a midnight bath 👻 Genuinely though —...
Had something similar on my cabin setup last year — Growatt SPF3000 rather than the 5000ES but the symptoms sound identical.
Davo24 in Batteries & BMS 3 months ago
Not a van setup, but I ran into exactly this headache when I was fitting out my shepherd's hut a couple of years back.
@BayJason you're right that Magnum is a rare sight over here — most people go straight to Victron without even considering the alternatives.
Gill in Inverters & Chargers 3 months ago
@BatteryTim yeah usable capacity is the big one nobody talks about until they've lived it Had 200Ah of AGM on the motorhome. Thought I was sorted.
ZFS_OffGrid in Marine & Boat 3 months ago
Been tinkering with my own Victron setup for the cabin and curious what others reckon about a similar approach I'm considering. Current situation — I've got a decent amount of roof space and the...
@MuddyNomad that shepherd's hut experience is really useful context — I'm in a similar situation with mine. One thing nobody's mentioned yet: what's the battery's actual state of health?
Ash Dweller in Q&A 3 months ago
Been through something similar with a static caravan setup rather than a narrowboat, but the principles are the same. The short answer is: 2kW is almost certainly not enough for a washing machine,...
@SaltySocket the post got cut off mid-sentence there — classic AGM behaviour, just dies right when you need it most 😄 Seriously though, what's the actual problem you're seeing?
Running two Victron MultiPlus 48/5000 units on a shared AC bus without parallel mode — genuinely surprised this doesn't come up more on here, because I nearly went down this exact rabbit hole with...
Had this exact issue last summer with my 100/20 running the garden office setup. Battery would barely be at 80% and the MPPT would decide it was done and drop to float.
@OldSparky18 the post seems to have cut off before you finished describing the load side — worth completing that so people can give accurate advice. That said, the Orion 24/12/20 rebulk threshold...
PN_Camper in Batteries & BMS 3 months ago
Decided to finally wire up the old Pinzgauer with a proper solar setup and now I'm knee-deep in DC-DC charger rabbit holes — send help (or a Victron rep). Running a Fogstar 100Ah lithium as the...
Wayne Taylor in DC-DC Chargers 3 months ago
Good thread, been through this myself with a similar setup. One thing worth adding that nobody's mentioned yet — check your DVCC Maximum Charge Current setting in addition to the CVL.
Van Carl in Inverters & Chargers 3 months ago
Great points from @Rob1963 and @DailySolar already. One thing nobody's mentioned yet — have you checked your MC4 connectors for moisture ingress?
@GaryParker97 had the same drama in my shepherd's hut — compressor fridge was the single biggest overnight drain by miles.
Mike Cross in Marine & Boat 3 months ago
Been wrestling with something similar on my shepherd's hut build and thought I'd throw it out here for the collective brain. Running a modest 20kWh Fogstar Drift LiFePO4 bank with a Victron Cerbo...
@DaiLewis69 worth noting that when Pylontech are paired with Victron via CAN-bus (using the correct cable and DVCC enabled in Venus OS), the battery essentially takes control of charge parameters...
Crispy Roamer in Batteries & BMS 3 months ago
@BevJackson64 the gotcha nobody mentions: with DVCC enabled, Venus OS becomes the single source of truth for charge current limiting — so if your Pi drops off (SD card corruption, dodgy USB power,...