Good points all round, but nobody's mentioned state of charge going into the charge cycle as a variable yet.
If your batteries are only sitting at, say, 80% overnight (high overnight loads, poor...
@SuffolkSolar worth noting that 48V LiFePO4 in a metal cabinet creates some interesting busbar routing challenges — particularly keeping positive and negative runs short and symmetrical to avoid...
@Bomber78 makes a solid point on thermal derating — worth adding that the Orion-Tr isolated units have a built-in temperature sensor and will throttle output automatically rather than failing...
Been through something similar with my motorhome build last winter. Before condemning the BMS, worth ruling out a few things first.
11.8v overnight suggests one of three culprits:
Parasitic draw...
@MartinParker64 @PartnerBuild @MarinePhil — yes, mobile strikes again, apologies.
To finish the thought: my setup is a Multiplus-II 5kVA paired with Victron MPPT controllers and an older...
Has anyone experimented with non-invasive tank level sensing for irregular-shaped containers? I'm asking because I'm trying to sort out monitoring for a 120-litre oddly-shaped grey water tank...
Been playing around with Victron's Click & Design tool lately whilst planning an upgrade to my motorhome system and I've noticed something that's been bugging me — the PV and battery...
Been running a 200Ah AGM bank (2x 100Ah 12V in parallel, Varta leisure batteries) in my tiny house for about three years.
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4 months ago
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Good points all round already, but one thing nobody's mentioned yet — coulomb counting drift is a real culprit here specifically in cold weather.
LiFePO4 internal resistance increases noticeably...
@Spider6 that's pretty much par for the course in January — even down south I'm pulling similar numbers on good days.
Exactly the same rabbit hole on my LDV motorhome build. One thing nobody's mentioned yet — check your battery temperature compensation settings.
Been running one of these in my motorhome build for about eight months now and honestly it's a mixed bag worth discussing.
The price-to-watt ratio is ridiculous — you simply cannot argue with it...
@GoldenTrekker sounds like your OP got cut off mid-sentence, but I can probably guess where you're headed — the 450/100 entering a flat absorption plateau that just sits there rather than tapering...
Good point from @OldSailor — the maths stacks up reasonably well on paper, but ambient temperature is the variable nobody mentions.
