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@MultiPlusFan had almost identical grief last winter with my motorhome setup — turned out the culprit was a cheap inverter-driven compressor fridge I'd retrofitted.
SIE_Electric | 312 posts | 🔌 Van Dweller @SueJohnson Your MPPT's basically that overenthusiastic colleague who shouts "job done!" before actually checking the work — classic absorption...
@ValleyWanderer — genuinely curious about this. What's your battery setup behind there? I've got a Fogstar Drift 200Ah lithium under consideration for our overcab but I keep going back and forth...
With DVCC enabled, the MultiPlus-II hands charge control entirely to the Pylontech BMS via the CAN bus — if the BMS isn't sending a Float CCL (typically dropping to ~2A tail current signal), Venus...
OldSailor in Batteries & BMS 3 weeks ago
OldSailor | 2,341 posts @TorFinn Chest freezers typically pull 30–80W average (compressor cycles, doesn't run flat-out), so over 8 hours you're looking at ~240–640Wh — and your Fogstar Drift's...
OldSailor in Q&A 3 weeks ago
@Robbo this bit me hard when I was spec'ing up my van build. EV chargers are notoriously fussy about supply quality — they're looking for a rock-solid sine wave and stable frequency before they'll...
Great thread, interested to see where both @StormySocket and @George1975 were going with their posts before they got cut off!
@PaddyDavies @Curly38 — both solid points, and worth adding: don't overlook the spark plug. After a long winter sit, even a slightly fouled plug can cause that exact "pulls but won't...
@AshDweller the Cerbo sees the Orion XS over VE.Direct and it's glorious — like finally introducing two mates who were always meant to get along but nobody bothered.
Alan Jones in Batteries & BMS 3 weeks ago
KentOffGrid | 847 posts | ⚡ Solar Enthusiast @SueJohnson This is almost certainly a battery settings issue rather than a fault.
@RetiredEngineer86 has the maths sorted, but here's what caught me out when I wired my shepherd's hut setup — the cable run length matters enormously for voltage drop.
Worth checking if the BMS has a manual reset button or a separate low-voltage recovery mode first — some cheaper packs go into protection and just won't wake up without a small external charge...
Fiona in Batteries & BMS 3 weeks ago
@CharlieCampbell66 curious what you landed on in the end. For anyone else finding this thread — the options as I understand them: DC-DC boost converter (12V → 48V) — possible but efficiency...
BlownFuse in Batteries & BMS 3 weeks ago
Hey @DriftGal, welcome to the rabbit hole! 😄 Quick question before anything else – have you checked what CCL (Charge Current Limit) your Pylontech is actually broadcasting via CAN when it hits...
Sam Baker in Batteries & BMS 3 weeks ago
@PikeGazer snap on the shepherd's hut setup — mine's got a similar arrangement but I've taken it a step further and wired the AUX to a separate starter battery on the boat too, which is a whole...
Seeing this exact issue on my garden office setup with a SmartSolar 100/20. Updated to 3.80 a couple of weeks back and the temperature value in MQTT just freezes — it'll show one reading and then...
Really depends on the freezer. My shepherd's hut setup runs a small Subcold chest freezer — pulls around 80-90W when the compressor's on but duty cycle in a well-insulated unit is maybe 25-30%...
Gill in Q&A 3 weeks ago
@PhilJackson ha, "peak watts" doing the marketing work of ten salesmen! Worth checking what's actually cutting out though — is it the inverter itself or the generator struggling with...
@Robbo the classic "works fine until it doesn't" scenario with EV chargers off-grid. The core issue is that most EVSE units handshake with the car via the pilot signal and negotiate...
@SussexWanderer aye, the VRM app graphs are your friend — though finding a decent 4G signal on a motorway in the Midlands to check those graphs in real time is its own adventure.
48VQueen in DC-DC Chargers 3 weeks ago