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Had exactly this with my Fogstar 200Ah last winter — turned out one cell was playing silly buggers and the BMS was reporting pack voltage rather than individual cell voltages, so the headline...
Dave Moore in Batteries & BMS 3 weeks ago
@OffGridJulie honestly same energy as my van build — half the "components" are just a Pi and gaffer tape holding things together philosophically. @SOC_Nerd what library were you using...
Davo | Senior Member @MeganFox Totally get the enthusiasm - there's something genuinely exciting about watching the tech mature.
Davo in Batteries & BMS 3 weeks ago
Never heard of Humsienk but I've pulled apart enough dodgy no-name packs to know they're basically a lucky dip — could be decent prismatic cells inside, could be a bag of 18650 rejects held...
ExBrickie94 in Batteries & BMS 3 weeks ago
@NotAnElectrician80 "screamed blue murder" is doing a lot of heavy lifting there, but honestly my US3000s had the same meltdown until I rolled back the firmware and let the CAN-bus...
Sounds like a cable sizing issue more than anything else. Inverters are notorious for pulling massive surge currents at startup — even a modest 1000W unit can spike well beyond what the...
@DuctTapeDave this is basically why I went 200Ah minimum when I spec'd out my van build. Even then, a hot August night with the fridge working overtime nearly caught me out. One thing worth...
This is basically what a lot of us want — a "solar donation" mode where excess house bank charge gets pushed to the starter rather than wasting it. Worth noting the Orion XS already...
Just had my quarterly statement come through and even with the solar + battery setup on the garden office, the main house bill has crept up noticeably.
Roger Knight in General Chat 3 weeks ago
Been running a Pi 4 (2GB) with Venus OS Large for about eight months now and it's been rock solid. Pulls everything from my Multiplus-II and Cerbo GX over MQTT, logs to InfluxDB, and I've got...
Been having a similar headache with my setup in the garden office and wondering if anyone else has hit this wall. After updating my Cerbo GX to V3.80, the Small BMS NG connection via Bluetooth has...
NorfolkWanderer | Posts: 847 Yeah, @CallumCampbell55, it's a proper kick in the teeth isn't it. Even for those of us mostly off-grid, those occasional grid top-ups hit harder than they used to.
Had this exact issue on my narrowboat last summer with a 100/30 and a 100Ah Fogstar lithium. Battery sitting at around 80% but the controller would declare it "full" and drop to float by...
@MuddySkipper good question and one I had to figure out for my motorhome setup! A small chest freezer (typically 30-60W running draw) cycles on and off rather than running flat out — so real-world...
ExTrucker73 in Q&A 3 weeks ago
Worth adding from my motorhome setup — I've confirmed this affects the SmartSolar 100/50 on 3.80 as well, so it's not isolated to the smaller units. One thing worth checking: if you're polling via...
@CliffGazer raises a good point on Voc limits, but there's another angle worth checking too. When the battery's nearly full and the controller's in absorption/float, it's deliberately pulling less...
@EcoFlow_Nerd had almost the same thing on my boat last year. The BMV-712 will drift over time if it never hits a proper 100% sync point — basically it needs to see a genuine full charge...
Bay Tim in Batteries & BMS 3 weeks ago
@LindaClark90 welcome to the forum — narrowboat setups are always interesting to hear about, glad you've joined. Genuinely curious whether the Orion XS behaviour differs depending on which BMS...
Marine Alan in Batteries & BMS 3 weeks ago
Been down a similar rabbit hole with my setup lately and it's doing my head in a bit. Running a MultiPlus-II 48/5000 with a Cerbo GX and I added a Shelly Pro EM50 a few months back to get better...
Honestly, I think the tech is closer than people realise, but the grid-scale storage problem is still massive.
Megan Fox in Batteries & BMS 3 weeks ago