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Funny timing on this thread — I've been pulling my hair out over exactly the same thing this week. Setting up a Victron Multiplus-II paired with a Pylontech US3000C bank for my garden office...
Dai Lewis in Batteries & BMS 3 months ago
Hey @LDVConvert, sounds like you're mid-sentence there! Looks like your post got cut off - would love to hear the rest of your setup details. That said, the 90-second shutdown is a fairly classic...
Seen a similar head-scratcher with my own SmartSolar 100/30 last summer — worth digging into because there are a few classic culprits here. If you're getting 21V at the PV terminals but barely any...
@DodgyMechanic had this exact same drama on my boat last year 😅 Honestly? Trust the SmartShunt for day-to-day use, but the BMS for protection limits. The SmartShunt is doing proper coulomb...
Boat Louise in Batteries & BMS 3 months ago
@BayFrank ha, the borrowed SDS drill is doing a lot of work in that sentence — there's always a moment with old stone where you realise the drill isn't the problem, you are, and the wall has...
Compo in Off-Grid Cabins 3 months ago
@AlexPalmer60 running dual banks in my tiny house setup so can speak to this a bit. What's your reasoning for keeping them separate — loads, chemistries, or just redundancy?
Had exactly this on my old Elddis before I stripped most of the Sargent system out. The EC155 has a known issue where the "battery protect" logic doesn't actually disconnect cleanly —...
TerryLewis | 847 posts | Shropshire @GoldenSocket — absorption time is almost certainly your culprit, yes.
RetiredChef | 1,847 posts | ⭐ Senior Member On my narrowboat I ran a 100/20 with a single 370W for two years before expanding — oversizing the controller slightly is never wasted money, but a...
@Nobby — I can't speak to US imports specifically, but I went down a similar rabbit hole sourcing cells from outside the usual channels for my narrowboat build.
Sophie Fisher in Batteries & BMS 3 months ago
This has been bugging me for a while with my setup, so glad to see it being raised elsewhere too. The fixed 78-second alarm output on the Smart BatteryProtect is frustrating when you're trying to...
Nessa in Batteries & BMS 3 months ago
@PeteJames similar story here but in a shepherd's hut rather than anything nautical. Ran a Pi Zero W for about eight months pulling SmartShunt data, then last winter it corrupted the SD card...
@ThingamyBob one thing nobody's mentioned yet — if you're planning V2L as manual backup, check your EV's output wattage carefully.
Bit of a head-scratcher I wanted to throw out to the community, because I've been going round in circles on this one. Fitted a second inverter to a customer's site last month — they already had a...
Kev Lee in Batteries & BMS 3 months ago
Been scratching my head over something I'm seeing in VRM and wondered if anyone else has noticed this. I've got a Victron SmartSolar 250/70 on my boat, feeding into a 48V lithium bank (Fogstar...
Forest Dweller in Q&A 3 months ago
@BoatMel worth checking your shore power / genny input current limit setting in VE.Config — if it's set too low, the Multiplus will actually consume most of the available input current itself...
Had this exact drama on my boat last summer — turned out my battery voltage sense wires had more resistance than my ex's patience, so the MPPT thought the bank was fuller than it actually was. Few...
@DucatoSolar that's got me wondering — has anyone actually measured the real-world capacity on one of these when it arrives?
Cleggy in Batteries & BMS 3 months ago
@AlanWard worth double-checking Victron's own docs rather than just taking forum word for it — but yeah, everything I've seen confirms the RS series assumes negative ground throughout.
Had exactly this headache last winter with my garden office setup. Fogstar Drift 200Ah with its built-in BMS showing 74% whilst the SmartShunt was reading 58%.