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@TracyKnight exactly this — that flat curve is brutal for voltage-based SOC. Between about 20% and 80% the voltage barely moves on LiFePO4, so the Daly's just guessing half the time. One practical...
OffGrid Max in Batteries & BMS 3 months ago
@MuddyMaker and @VoltBarry have already flogged the cabling horse admirably, so I'll add the one nobody mentions until it's too late: temperature compensation on the MultiPlus settings. My...
So just to make sure I'm following this correctly — when @CliveBaker says it doesn't provide all-pole isolation on whatever it is it doesn't isolate, does that mean in a grid-tied setup you'd...
Interesting thread — this is something I've been mulling over for the narrowboat setup actually. The idea of bleeding off excess capacity into the grid rather than just dumping it through a...
Panel Harry in Batteries & BMS 3 months ago
@Wayne1980 Your mate's situation is exactly what pushed me down the redundancy rabbit hole a few years back.
Tor Jake in Inverters & Chargers 3 months ago
Been thinking about this exact setup actually — I'm running a Sungoldpower 3000W inverter/charger in my van build and occasionally wonder about pairing it with a generator for those extended...
Been running into what looks like the same class of issue on my cabin setup and wanted to see if others are hitting this. My kit: Multi RS Solar 48V/6000VA alongside a SmartSolar MPPT 250/100...
PaulaFisher91 | 634 posts @FenlandSolar raises a good point on detection time. One thing nobody's touched on yet — your tail current percentage needs to be calculated against your actual battery...
Paula Fisher in Batteries & BMS 3 months ago
Had exactly this with my narrowboat setup — turned out my absorption voltage was set so low the controller thought it had already finished before it even started, so it just sat in bulk looking...
Cornish Nomad in Batteries & BMS 3 months ago
Bit of a niche one this, but curious if anyone's gone down this route... I've been thinking about the voltage sag issue when big loads kick in — obviously not running a 3-phase setup myself...
Julie in Batteries & BMS 3 months ago
Been mulling this over after a similar headache on my static caravan setup last winter, so thought I'd throw it open here. I'm running a pair of Victron Quattro 48V/5kVA units in a stacked...
Great points from @MarineGeoff and @OldSailor already. I'd add a few that caught me out: Cell-level fusing — individually fused cells can save your bacon if one goes rogue, especially in a...
Been down this rabbit hole for the past few months whilst planning out my van build and I keep coming back to the idea of using a salvaged washing machine motor as a PM alternator for a small wind...
LDV Nomad in On a Budget 3 months ago
@OldSailor meanwhile my Fogstar cells are just sat there fully charged, ready to help National Grid, while I'm still waiting for paperwork to clear 😅
Brummie84 in Batteries & BMS 3 months ago
Bit of an odd one this, but I've been mulling it over since someone on another forum raised something similar. Running a single 450W panel into a 48V LFP system — what's the sensible controller...
MarinePhil | 2,341 posts | ⭐⭐ Expert Member @AlanWard to add some practical weight to what's already been said — I ran a similar comparison when speccing out my last motorhome build.
Jumping in while we wait for the full post too — the thread title says enough really. One thing worth flagging before @DontPanic gets chance to clarify: the AC coupling vs DC coupling question is...
DODQueen in Batteries & BMS 3 months ago
Series wiring sorted my motorhome setup faster than you can say "Victron warranty void" — two panels in series gets you well past 60V and the SmartSolar stops sulking immediately.
Unregulated source straight into AGM through an Anderson = you're basically asking the battery what its pain threshold is before it vents. The grey plug on most caravans/motorhomes is wired for...
@Wayne1980 Worth having your inverter/charger set up so you can bypass the main battery bus entirely if needed.
Wez in Inverters & Chargers 3 months ago