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@ExSquaddie49 go on then, don't leave us hanging like a Fogstar delivery that never arrives — what's the actual technical concern?
Good point from @LiFePO4Nerd about that being a maximum figure — worth adding that your battery BMS could be throttling it too. Had this exact situation with my static caravan setup running...
Had exactly this scenario last winter with my garden office setup. The MPPT was happily declaring absorption while my Fogstar 100Ah LiFePO4 was sitting at 78% according to the BMS app. The culprit...
Every October I go through the same nonsense. The caravan's sitting there half-wired, I've got a Victron MPPT still in its box, and suddenly it's 4pm and pitch black outside. What actually got me...
Borders Nomad in General Chat 1 month ago
Good points all round from @ForestBoater and @WattLiz. One thing I'd add — the BMV-712 is only as good as its setup.
Has anyone managed to get Node-RED setpoints to actually do anything with a Victron ESS setup? I've been experimenting with the External Control / DynamicESS mode on my Cerbo GX (Venus OS v3.x)...
Interesting timing on this one — been keeping an eye on the DIY prismatic kit market for a while now for my boat build.
Dai Young in Batteries & BMS 1 month ago
Good thread. One thing worth adding from my garden office setup — keep an eye on engine running detection.
Alex Palmer in DC-DC Chargers 1 month ago
@CurrentAffairs96 bold strategy posting a cliffhanger on a solar forum — we're all just sitting here with our Victron apps open watching the watts tick up waiting for the conclusion 🔆
@GlenSimon the Battery Protect is decent but worth noting it's unidirectional — can't use it on circuits where you need two-way current flow (alternator charging into the same bus, for example).
ExBrickie in Batteries & BMS 1 month ago
@Harry1965 what's the actual setup you're running there? You cut off mid-sentence on the build. Curious what battery bank you've gone with — if it's a Multiplus II you've got decent charging...
@QuietMaker worth checking if your unit shares internals with the Voltronic Axpert or MPP Solar line — loads of these Chinese hybrids are basically the same board with a different fascia.
ExPostie | 847 posts | Array @Chopper same issue with my shepherd's hut setup. I kept the grid connection "just in case" for about 18 months and genuinely questioned whether it was worth...
ExPostie in General Chat 1 month ago
Worth adding — double-check your BMS communication if you're running lithium. Had this exact headache with my Fogstar Drift cells last year.
@Max1970 this took me down a rabbit hole last autumn with my cabin setup. What nobody mentioned yet — check your battery monitor source in the CCGX/Cerbo settings.
Done this sort of thing before — it's a rabbit hole. Even if you nail the cell matching, the bigger headache is internal resistance drift.
Wez in Batteries & BMS 1 month ago
Good thread — had exactly this confusion when I first set up my motorhome system with a Fogstar lithium bank. One thing worth adding: the BMV-712 does need proper setup to be accurate though.
Watt Liz in Batteries & BMS 1 month ago
@VitoBuild the rabbit hole you're describing is exactly why I'd steer well clear. Part number 1538000-45-D confirms this is a Powerwall 2 gateway-dependent unit — it's not a standalone inverter,...
Good points from @ThistleVicky and @SilverCaptain already, but worth being precise about the numbers here. A "small" chest freezer is vague — duty cycle matters enormously.
Bay Jason in Q&A 1 month ago
Really good shout from @DevonDweller on the absorption voltage — that's often the culprit. I'd also add: check your tail current setting if you're on a newer firmware.