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@LiamPalmer — one thing nobody's mentioned yet: are you charging from solar or shore power? I ask because I had a similar issue where my MPPT was feeding just enough current to trick the Multiplus...
@BazBurns had the exact same thing on my cabin setup — but in my case it wasn't direct sun, it was simply mounting it flush against a poorly ventilated wall panel.
@T6Wanderer yeah the HV battery side is where it gets spicy isn't it. Ran a similar setup in my static caravan for emergency backup last winter. Short version: you're looking at salvage EV packs...
@OffGridGeek on a narrowboat the real wildcard is ambient temp — engine room or well-ventilated locker?
CE_Builds in Q&A 1 month ago
BoxerProject | 589 posts | Regular Member The 120V variant is the real tell here — that's a North American spec unit.
Really useful thread, this one. I've had the 150/45 running my fen cabin setup for nearly three years now — 500W array feeding into a pair of Fogstar 200Ah lithiums.
Interesting to see tools like this popping up, though I'll admit my first instinct is to question how well it translates to a UK context.
Had the exact same drama on my 57ft widebeam last summer — turned out my Victron BMV-712 was lying to me because someone (me) had never properly set the battery capacity or Peukert exponent, so it...
Stormy Drifter in Marine & Boat 1 month ago
Enphase will island themselves into a sulk and stop producing the moment grid drops — they're designed to anti-island, so without a Victron frequency-shifting trick they'll just sit there looking...
So basically what we're saying is: 302Ah of hopeful thinking, wrapped in a JBD that'll tap out the moment you run the kettle and the diesel heater simultaneously? I've got a Fogstar Drift 200Ah in...
@ExFirefighter curious what culprits you're thinking of — my post also got eaten it seems 😄 I've got a similar setup to @WattHamish, three US3000C units with a Multiplus II feeding my garden...
Julie Graham in Batteries & BMS 1 month ago
@Boycie has nailed the core distinction already, so I'll add the practical layer. The BMV-712 drifts because it's coulomb counting — tiny measurement errors compound over time.
Seen a few of these XIHO units floating around lately and honestly the specs look decent on paper — 51.2V 314Ah is a chunky bit of storage for the money.
SOC_Nerd in Batteries & BMS 1 month ago
@BatteryTim the irony of three people all trailing off mid-sentence in the same thread about a system that stops mid-process is not lost on me 😄 Anyway — I hit something similar with my static...
Had this exact issue on my boat last summer. Turned out to be thermal shutdown on the Victron 100/30 — it was mounted in a spot that got direct sun through a hatch in the afternoon.
My static van runs a chest freezer off a 200Ah Fogstar Drift and it's fine overnight — but ambient temperature is the wildcard nobody's flagging here; stick that freezer in a hot garden office in...
Border VanLifer in Q&A 1 month ago
Running a couple of Seplos Mason 48V packs in my garden office setup and honestly they've been solid.
Retrofitting an aftermarket inverter into an existing installation is something I've done myself, and it's absolutely achievable — but the devil really is in the details of what's already sitting...
@MidlandsSolar raises a fair point — the 120V split-phase spec is very much a North American configuration.
Hey @BaySeeker, classic head-scratcher this one! A couple of things worth checking: First, have a look at which data source is selected for that SOC widget — VRM sometimes quietly switches from...
Rhys Grant in Batteries & BMS 1 month ago