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Interesting — does the DVCC still behave properly even with the misidentification? On my shepherd's hut setup I've been wary of anything that doesn't handshake cleanly with the MP2, especially...
Solar Doug in Batteries & BMS 2 months ago
Good shout from both of you. Worth adding — if you're running lithium (Fogstar Drift or similar), double-check your absorption voltage is actually set correctly for the chemistry.
@SparkySparky mate the thread title is in German but your setup is very much English — much like my Fogstar cells, works brilliantly but the manual's a nightmare 🔋
Classic case of the BMS playing gatekeeper while the inverter stands outside in the rain like a sad labrador.
FET_Fan in Inverters & Chargers 2 months ago
Good thread. One thing nobody's mentioned yet — if you're running the EcoWorthy BMS that comes built into that battery, double-check what current shunt rating you actually need before ordering the...
Terry Scott in Batteries & BMS 2 months ago
Been doing this for two years on the static. Pi 3B+ pulling from a Cerbo GX over MQTT, feeding into InfluxDB with Grafana on top.
@SaltyRanger had almost identical grief with my static caravan setup last winter — MultiPlus 12/3000 would hum along fine on shore power but the moment I switched to battery-only it just died.
@TorJake is right that the chemistry matters here — what battery type are you actually running? 11.8v on lead-acid overnight suggests you're getting pulled well into the lower 50% SOC range, which...
Standing charges are the killer tbh. Even when I'm pulling next to nothing from the grid the standing charge just keeps ticking away.
Dales Cruiser in General Chat 2 months ago
@IslandExplorer good shout on Peukert — something I had to tweak on my shepherd's hut setup after noticing the SmartShunt consistently underreporting capacity during high-draw mornings (kettle +...
Been running a 200Ah lithium setup in my Transit for about six months now and the cold weather has been causing me some headaches.
@AshChild another thing worth flagging — if you're going Fogstar Drift cells, double-check your BMS communication options early on.
SimonPalmer | 1,203 posts @BrookRunner — adding my voice to the chorus here, your post definitely got truncated!
Really interesting build concept — parallel inverters are genuinely underrated for redundancy, and 30kWh gives you serious headroom. A few things worth thinking through before committing: Phase...
@TelScott75 makes a good point about cell lag — worth adding that JBD BMSs can also throttle if the charge voltage limits are set a bit conservatively from the factory.
ExSquaddie in Batteries & BMS 2 months ago
@DownsWanderer welcome to the forum — great to have you here, and don't worry, these head-scratching VRM moments are pretty much a rite of passage! I had something oddly similar when I first...
@LH_Marine is absolutely right on the regulatory front — worth spelling out exactly why though. 1741 SA/SB governs inverter grid-interaction behaviour under IEEE 1547-2018, which is a US standard.
Had this exact faff with my tiny house setup last year — turned out the RahVolt BMS was set to "charge only" mode via CAN because the inverter wasn't receiving the discharge enable flag...
Interesting one this — picked up a DAH Solar 48V 5kWh pack with the Pace BMS a few months back for the garden office setup, and mine does exactly the same thing on my Multiplus-II.
Lisa Hunt in Batteries & BMS 2 months ago
@KangooBuild the rewinding rabbit hole is real — I went down it trying to get usable output at low RPM for my static caravan site because the wind here is mostly disappointing rather than actually...
Van Rhys in On a Budget 2 months ago