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Running a small chest freezer off my static caravan's battery bank and wondering if the maths actually works out in practice. I've got a single 200Ah 12V Fogstar Drift lithium (so roughly 2.4kWh...
Tel Hall in Q&A 1 month ago
Yeah this has been grinding my gears for a while now. My Victron setup covers probably 85–90% of my usage depending on the season, and yet the standing charge alone has nearly doubled in the past...
LiFePO4Fan in General Chat 1 month ago
@TerryScott72 makes a fair point about the usual suspects, but with that specific combo I'd look hard at the BMS communication first.
Been keeping an eye on the Heltec capacity testers for a while now and finally picked one up last month to test a batch of second-hand 280Ah EVE cells I sourced for my cabin build. Genuinely...
Wez White in Batteries & BMS 1 month ago
@AlanPalmer57 worth noting the default profile is essentially a generic sealed/AGM curve — 14.4V absorption, 13.8V float if I remember rightly.
Had something very similar on my narrowboat last winter. Spent weeks convinced it was temperature-related because that's the obvious culprit, but it turned out to be a cell imbalance issue that...
Heath Gazer in Batteries & BMS 1 month ago
Reply by RetiredElectrician10: @RetiredNurse58 Welcome to the rabbit hole! 😄 One thing that catches a lot of folk out with the MultiPlus on lithium — have you set the correct battery profile in...
Spent 40 years as a spark, so backup power isn't optional for me — it's a personality trait. Got a Honda EU22i in the shed alongside my static caravan setup.
@BerlingoConvert classic calibration drift situation — seen it on my own Vivaro setup with Fogstar cells. The short answer: trust the BMV-712 long-term, but the BMS short-term. The BMV uses...
Been thinking about this a lot lately after helping a mate kit out a volunteer first responder vehicle — really interesting use case that doesn't get discussed enough here. For emergency vehicle...
Interesting one this — anyone else running AC-coupled solar with Modbus frequency shifting and seeing the export limiting drop in and out unpredictably? I've got a much simpler setup on my...
Been mulling this one over since I saw a similar setup discussion doing the rounds, and it's relevant to my static caravan situation so thought I'd throw it out here. Running a Victron...
@Ben1968 nails it on the battery test — worth doing that first before chasing anything else tbh. One thing nobody's mentioned: check your battery's state of health vs state of charge.
Swapped my single 110Ah for a pair of Fogstar 100Ah lithium last summer and my Waeco hasn't broken a sweat since — turns out doubling the usable capacity and halving the weight was the upgrade my...
@Nessa73 classic Victron behaviour — the Cerbo GX thinks it knows your battery better than your battery does.
Brian Brown in Q&A 1 month ago
ExTrucker73 | Posts: 2,847 @Rob1963 that's a concern I've heard before — had something similar (different brand) on my motorhome build and it was a right pain to diagnose. Quick question for the...
ExTrucker73 in Batteries & BMS 1 month ago
@CaddyCamper is right that brand matters — my Fogstar Drift cells on the narrowboat threw a wobbly until I rang Fogstar directly and got the actual recommended absorption voltage, which was...
Maria Jones in Marine & Boat 1 month ago
Had a similar head-scratcher with my SmartShunt a while back — the starter battery voltage was reading completely off compared to what my multimeter was showing at the terminals. Turned out the...
Battery Ray in Batteries & BMS 1 month ago
Running into exactly this on my narrowboat at the moment — Victron BMV-712 sitting at 74% whilst the BMS on my Fogstar Drift 200Ah is claiming 81%.
Been going down a similar rabbit hole recently with my motorhome build, so this feels timely. Running a 48v lithium bank (Fogstar Drift cells) with a Victron Orion-Tr Smart stepping down to 12v...
Geordie in DC-DC Chargers 1 month ago