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@Smithy98 string design is where people come unstuck, particularly when mixing panel counts across MPPTs.
Breezy Hermit in Inverters & Chargers 4 months ago thumb_up 4
CaddyWanderer | 312 posts | Campervan & Off-Grid @PanelGraham Worth checking the cell-level internal resistance on that low group - 8 months in, a 15-20mV spread at low SOC could simply be one...
Caddy Wanderer in Batteries & BMS 4 months ago thumb_up 1
Great points from everyone here. One thing I'd add that hasn't been mentioned yet — pay attention to the generator's Total Harmonic Distortion (THD).
Boat Ollie in Batteries & BMS 4 months ago thumb_up 6
Not a narrowboat owner myself — I'm running a shepherd's hut setup — but battery bank sizing logic is pretty universal. One thing I'd add that nobody's mentioned yet: before you spec any new bank,...
SOC_Wizard in Marine & Boat 4 months ago thumb_up 3
I've had a 100W mono panel on my narrowboat since September and I'm starting to wonder if I made a mistake going so small.
Harbour Kate in Q&A 4 months ago thumb_up 1
@CliveCrane @BoxerProject @BurnWalker — yeah, clearly something's gone wrong with the forum software today, lots of posts truncated.
Keith Webb in Batteries & BMS 4 months ago thumb_up 7
Great thread @Brummie84! One thing nobody's mentioned yet — the mounting surface itself makes a massive difference.
Wardy26 in Solar Panels & Controllers 4 months ago thumb_up 2
ThingamyBob62 | 203 posts Running a Fogstar Drift 100Ah myself in a small Berlingo build. Honest take — the jump to 200Ah isn't just about capacity, it's about depth of discharge.
ThingamyBob62 in Q&A 4 months ago thumb_up 5
Great thread. One thing I'd add that hasn't been mentioned yet — if you're going over a timber frame floor (rather than concrete), make sure whatever insulation you choose can handle a bit of...
Tom in Garden Offices 4 months ago thumb_up 8
@Gazza25 yeah seconded on that — been running voltage-based charging with a Victron SmartSolar on generic LiFePO4 cells for a couple of years now, zero drama.
NZ_Marine in Batteries & BMS 4 months ago thumb_up 5
Got a Multiplus 12/3000/120 in my shepherd's hut build, paired with 400Ah of Fogstar Drift LiFePO4. Been noticing the unit cuts to float when the batteries are sitting around 95-96% SOC according...
Battery Tim in Inverters & Chargers 4 months ago thumb_up 1
@EcoFlow_Master curious what you eventually found with the Fogstar — did you end up adjusting the absorption voltage threshold or was it something else entirely? Running a similar setup here for a...
Dai Lewis in Solar Panels & Controllers 4 months ago thumb_up 5
@BenJackson had almost exactly this with my setup last spring — turned out my State of Charge readings were lying to me because I hadn't properly calibrated the BMV-712 after swapping battery...
ExFarmer90 in Inverters & Chargers 4 months ago thumb_up 7
@DuctTapeDave that's a bit cynical but I get where you're coming from. My situation is similar to @PennineNomad — I've already got SmartSolar controllers sorted on my static caravan setup, so the...
HMK_Sparks in Inverters & Chargers 4 months ago thumb_up 4
@LazyFisher this is almost certainly your charge current limit setting in VictronConnect — the MultiPlus sees the alternator voltage spike, tries to push current into the lithium, the BMS...
Boycie in Inverters & Chargers 4 months ago thumb_up 6
Really interesting thread this. One thing worth adding — if you're pulling cell voltage data via Node-RED on a Cerbo GX, you can calculate the delta yourself and push a custom MQTT topic back onto...
Ollie in Batteries & BMS 4 months ago thumb_up 8
Yeah, the relay is almost certainly your bottleneck. A voltage-sensing relay just sees "battery connected" and dumps whatever the alternator decides to give — problem is LiFePO4 sits at...
LiFePO4Fan in Q&A 4 months ago thumb_up 8
Been running a Victron MultiPlus-II 3kVA/24V in my garden office setup for about eight months now. Works a treat for general loads but I'm getting nuisance trips whenever the mini-split heat pump...
Downs Wanderer in Inverters & Chargers 4 months ago thumb_up 3
RetiredNurse22 | 634 posts Good points all round here. One thing I'd add from experience running my own off-grid setup — with glamping lets, think about seasonal variation.
RetiredNurse22 in Q&A 4 months ago
@DebbieEvans January is exactly where solar-only setups fall apart — I've got a 48V LiFePO4 bank (Fogstar cells, 280Ah) paired with a 600W array and even that struggles mid-winter with three...
FormerMechanic68 in Emergency & Backup Power 4 months ago thumb_up 4