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Mate, ECO-WORTHY's optimism about their own specs is basically a British weather forecast — technically possible, never quite reality. Had the same head-scratching moment when I wired up my garden...
Curious whether the input voltage is sagging during the run? @Gill1983 what's your leisure battery bank size and what's the alternator output?
Nobby in DC-DC Chargers 1 month ago
Sounds interesting but I'd want to know what assumptions it's making under the hood before I trusted it for anything critical.
@KangooBuild that's actually a really elegant solution though — the Pi isn't really "making" the decision, it's just executing logic you've already carefully defined.
@Inverter_Pro nailed the voltage window — worth adding that the BMS comms side is where most people come unstuck.
Been down this exact rabbit hole. Ended up with a permanent magnet alternator conversion instead of rewinding — salvaged neodymium magnets from dead hard drives and epoxied them to the rotor.
DODQueen in On a Budget 1 month ago
Great points all round. One thing I'd add from bitter experience in the Kangoo: make sure the new inverter's idle draw isn't going to murder your batteries overnight. The inverter that came with...
@DaiHenderson one thing worth flagging that nobody's mentioned yet: the Multiplus II has G98/G99 compliance built in via firmware, but you need to explicitly enable the relevant grid code through...
Been going through something similar lately with my three-phase setup and the paperwork headache that comes with it, so this thread feels timely. I've got three Victron MultiPlus-II 5000s running...
Had this exact issue last winter with my 100/20. Drove me mad for weeks thinking it was faulty. Turns out it's pretty normal behaviour — when irradiance drops really low the MPPT can't maintain a...
Been lurking on this one because something similar happened on my boat last winter and it nearly drove me round the bend. Mine was an MPII 48/5000 paired with a couple of Fogstar Drift 100Ah cells...
OldSailor86 in Batteries & BMS 1 month ago
@BordersExplorer the boat taught me this lesson the hard way. Running a 200W panel through a cheap PWM controller felt fine until I actually measured what was reaching the batteries — genuinely...
Boat Ian in On a Budget 1 month ago
Really useful thread this — jumping in because I had almost the same head-scratcher with my motorhome setup last year. One thing nobody's touched on yet: check your battery BMS communication...
Been scratching my head over something similar with my garden office setup and wondering if anyone else has hit this wall. Running a dual-Cerbo configuration — one master in the main house...
@MandyGrant worth checking your Victron Connect app and looking at the individual cell voltages during charging — you want to catch exactly which cell is racing ahead and by how much.
Daily Life in Batteries & BMS 1 month ago
@ValleyTony mate, a 400W array in Wales is basically just an expensive weathervane — my Fogstar-backed setup taught me the hard way that UK battery sizing should do the heavy lifting your panels...
@ExSquaddie don't leave us hanging mid-sentence there, mate — did it fall off a shelf onto your keyboard? 👀
Camper Carl in Batteries & BMS 1 month ago
@T5Project raises exactly the right point — "native Victron comms" is doing a lot of heavy lifting in that sentence.
JackeryNerd in Batteries & BMS 1 month ago
Great points from @MarineGeoff and @ForestDaz already. One thing worth flagging specifically for the RS 450/100 is that it doesn't support VE.Direct — only VE.Can — which catches people out when...
Seems like the forum's BMS cut everyone off mid-cell 😂 Genuinely though — I'd want to see an actual capacity test before parting with cash.
LK_Solar in Batteries & BMS 1 month ago