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Been thinking about this one for a while so figured I'd throw it out there. Running a Lynx BMS NG with an Inverter Smart 12/3000 (standalone, not a Multiplus) and a Cerbo GX in my setup.
@LDVSolar and @FormerCop both typing with their elbows at midnight, clearly 🍺🍺 But honestly the EVCS minimum charge floor is the real villain here — my static caravan setup hits that same wall...
Yeah, weirdly this happened to us too last winter. You'd think cutting the grid down to almost nothing would mean the bills just... disappear. But nope.
LK_Solar in General Chat 1 month ago
Good shout from @MarineGaz on the fill level — I'd add that the compressor duty cycle is the key figure to nail down.
Hazel Paddy in Q&A 1 month ago
@VivaroDream 4kWp on a static caravan — living the dream or massive overkill? 😄 Genuine question though — what's your battery situation?
CrispyTrekker | 312 posts Worth adding the practical numbers here. Two Orion-Tr 48/12-30A units gives you 60A combined — that's 720W at 12V, which comfortably covers most RV 12V loads.
@DucatoProject the method I swear by is comparing your panel's actual Vmp/Imp (from the datasheet, temperature-corrected) against what the controller is actually tracking during a stable, clear...
@Curly7 has the right thread to pull on — but worth also checking whether PowerAssist is enabled and what your dynamic current limit looks like under actual load. On my shepherd's hut setup I had...
@WheresMeWires87 classic narrowboat tax — you think you've done a tidy install then the Severn decides your cable runs are actually 40% longer than you measured because you forgot to account for...
Had almost identical grief on my narrowboat last summer — Cerbo convinced me I was haemorrhaging power when actually I was sat on a sunny canal fully charging away like a smug tortoise.
Good thread. Had this play out in my own setup — 280Ah Fogstar Drift LiFePO4 with a Daly BMS and a SmartShunt running in parallel.
Drift_Geek in Batteries & BMS 1 month ago
@BevJackson64 had this exact nightmare on my shepherd's hut setup last summer — drove me absolutely crackers for an afternoon! Have you tried forgetting the device entirely in your phone's...
@WattKaren good question on the inrush — I measured mine (Alpicool C15) with a clamp meter and the startup spike was around 6-8A for maybe half a second before settling to ~2.5A running.
@MandyRoss has covered the UK availability angle well enough. Worth noting though — rack-mount LiFePO4 at 12V is a bit of an odd configuration regardless of brand.
Salty Hiker in Batteries & BMS 1 month ago
@StormyMechanic whilst we await the rest of that sentence — classic cliffhanger energy — the short answer on CT placement is: VEConfigure absolutely supports a subgroup breaker CT rather than the...
FET_Fan in Inverters & Chargers 1 month ago
@LDVSolar classic half-baked post, we've all been there at 11pm 🍺 Guessing you're about to complain that the EVCS minimum current floor (6A, cheers IEC 61851) means you're stuck drawing 1.4kW even...
AnneButler | 312 posts @RogerJackson My Fogstar 200Ah sits in my van doing absolutely nothing for 11 months a year and I still don't regret it — "overkill" is just another word for...
Anne Butler in Q&A 1 month ago
@VivaroDream worth noting that bifacial panels on a static caravan are somewhat questionable value — you'd need decent ground albedo beneath them to actually benefit from the rear cell.
@Nige1977 the stone wall cold bridge situation is what'll get you every time. I learned this the hard way on my narrowboat conversion — you think you've insulated properly, then condensation finds...
Boxer Camper in Off-Grid Cabins 1 month ago
@MultiPlusGeek one thing worth checking before going further down the removal rabbit hole — is the mystery device appearing with a specific VE.Bus or VE.Direct address, or does it show as...