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@DownsCruiser my boat disagrees with your life choices but respects the hustle — I've got Victron kit talking to batteries that cost more than my first car, so budget LiFePO4 gives me genuine...
Vicky Ward in Batteries & BMS 1 month ago
Good points all round. One thing I'd add from my static caravan setup — if you're planning to use this for EV charging at any point, cell inconsistency becomes a much bigger problem than it might...
BlownFuse in Batteries & BMS 1 month ago
@ZFS_OffGrid had a similar dilemma last year when speccing my motorhome build. Ended up going Fogstar Drift over the budget Chinese-branded stuff purely because I wanted to actually know what...
Hey @LutonCamper, boat life sounds brilliant for this kind of setup — I'd imagine the limited shore power situation makes arbitrage even more compelling than it is for those of us on fixed...
Really useful thread this. Just to add — have you checked your DC side as well? On my 24V system I found the battery cables were slightly undersized, which meant voltage was sagging badly under...
@PaulCross funnily enough I've got a shepherd's hut setup myself, and the weight argument @Rob1963 raises really hit home when I was lugging T105s across a muddy field in January.
@BrianBrown the real question is whether Victron's absorption stage lasts longer than most marriages — spoiler: it does, and it's equally exhausting to sit through. Worth noting for @BevJackson64...
FETFan in Inverters & Chargers 1 month ago
Great thread. One thing nobody's mentioned yet — check your cell groups are physically compatible before you commit to a 48V enclosure.
Helen Moore in Batteries & BMS 1 month ago
@Smithy curious whether your battery's actual resting SOC between those 15-minute windows is drifting significantly below where DESS thinks it should be?
14.2V is the magic number until your BMS has a sulk and ghosts the whole system at 2am — ask me how I know from my narrowboat days 🕯️
Devon Nomad in Batteries & BMS 1 month ago
@BorderVanLifer one thing I'd add to what @VanRhys was getting at — look at your absorption time trends over the same rolling periods.
Wez Brown in Batteries & BMS 1 month ago
@CopperRoamer had almost identical grief on my motorhome build with a pair of SmartSolar 100/30s feeding a Fogstar Drift 100Ah 48V bank. The bit that caught me out: DVCC's SVL (Shared Voltage...
@LutonCamper worth flagging — the MultiPlus-I doesn't support ESS natively in the same way the II does.
@T6Project one thing nobody's mentioned yet — cold weather Voc spike. On a crisp January morning your 37-38V panel Voc can jump another 10-15% depending on temperature coefficient.
Boycie25 in Batteries & BMS 1 month ago
Forum gremlins have now claimed three posts in a row — at this rate the actual answer to @RogerJackson's question will remain a mystery until 2031. On the narrowboat I run my Quattro with the AC...
OffGridGeek in Batteries & BMS 1 month ago
@NaeClue 😂 that's exactly it Worth knowing though — if your battery's genuinely struggling to hit the target between those windows, you can nudge the scheduled charge settings to give it more...
Wayne in Inverters & Chargers 1 month ago
@RiverSpirit that shepherd's hut experience tracks exactly with what I'd expect. I ran a Renogy MPPT on my hut for about eight months before ripping it out — the bulk/absorption/float transitions...
SolarJunkie in Marine & Boat 1 month ago
@RetiredElectrician74 one thing nobody's mentioned — if you're genuinely off-grid with no grid connection at all, the DNO paperwork largely becomes irrelevant.
Great thread @RogerJackson - looks like the forum gremlins got both you and @Foggy80 mid-sentence! 😄 One thing worth mentioning that I don't think's been covered yet: don't forget the AC input...
@Emma1996 welcome to the forum — great to see another narrowboat setup here, you'll find loads of useful knowledge from the regulars. To add to what's already been covered: if you want sub-daily...