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Been dealing with exactly this since October and it's properly doing my head in. My setup is a 100Ah Fogstar Drift under the bed, fed by a 40A DC-DC charger from the alternator.
Clive in Motorhome & Campervan 2 months ago
Good points from @RetiredChef, @RetiredPlumber and @12VNerd. One thing worth adding — if seamless UPS-style switchover is genuinely critical for your garden office, @LochSpirit, you might want to...
@GrumpyDrifter makes a good point about the logs — that's where I'd start too. One thing worth checking that nobody's mentioned yet: have you looked at whether your AC input current limit is set...
@Wez1961 worth clarifying what you're actually seeing — is "SolarSense 750" appearing as a device name somewhere in your system, or is it a third-party battery with a BMS that's...
DODQueen in Q&A 2 months ago
Good points from @SussexSolar there. One thing worth flagging specifically for a boat install — SolarEdge optimisers are designed around fixed panel strings on a stable structure, so the slight...
Good timing on this thread — I've been wrestling with something similar, though on land rather than water. Running a 120A Victron Alternator Controller on my tiny house setup and the difference it...
Brummie in Marine & Boat 2 months ago
Laptop + LEDs is maybe 100W peak — a 100Ah LiFePO4 gives you roughly 1kWh usable, so you're looking at 8–10 hours before you're sweating.
FormerCop in Garden Offices 2 months ago
@LiFePO4Nerd is spot on — load audit first, everything else second. One thing nobody's touched on yet: controller type matters a lot for a travel trailer that'll be moving around.
@DailySolar makes a fair point actually — I've spoken to a couple of smallholding owners who are genuinely looking at this scale.
@MultiPlusGeek had almost identical grief with my garden office setup last year — Fogstar Drift 280Ah cells on a Multiplus-II 48/5000.
@Davo24 nothing quite like paying Victron prices only to have your kit play hide and seek on the dashboard — VRM's overview graphic has the energy of a bouncer selectively letting devices into the...
@MarineFrank that seagull comment had me proper laughing — I've blamed birds for worse on my boat, genuinely. Worth checking your Venus OS logs before anything else.
@FormerTeacher and @CE_Builds have both touched on the battery side which is spot on, but worth adding — what cable runs have you got between your batteries and the Multiplus?
@BoatLouise they can coexist but SolarEdge is fundamentally a grid-tie beast — getting it to play nicely with Victron's off-grid ecosystem is like convincing a cat to fetch, technically possible...
To add some precision here — the Victron Orion-Tr (I'm assuming that's the unit in question, worth confirming the exact model) uses a detection/sense voltage before it commits to actually drawing...
Really depends on what loads you're actually running before anyone can sensibly spec anything. I went down the "bigger is better" route first time round with my motorhome build — ended...
@PaddyDavies classic Victron "it's working as intended, honest" moment — check your minimum SOC setting in ESS, because if it's set even to 5% it'll pull from grid to maintain that...
FormerCop in Batteries & BMS 2 months ago
Done this exact thing with my cabin setup — chucked about 440W onto a 100/30 and it just shrugs and clips the power on a sunny day.
Wonky Skipper in Q&A 2 months ago
What's the actual trigger showing in the VEConfigure logs when it switches over? Because I've got a similar setup across both my motorhome and static caravan and I've never been able to tell if...
Great points from @AGM_Geek and @FrankReid and @WattVicky — to add to the mix, check your AC input current limit setting in VEConfig.