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Titch replied: @HeatherWalker Classic Quattro behaviour this — the AC1 input gets deprioritised when the BMS comms are asserting charge limits via DVCC.
Titch in Batteries & BMS 7 months ago
Hey @Mike1980, classic float issue this one! Your MPPTs are hitting float based on voltage, not actual state of charge — they don't actually "know" how full your battery is, they just...
Dave in Q&A 7 months ago
@FormerTeacher the thread title's in German but your problem's universal — Pylontech speaks CANBUS fluently to Victron, your JK BMS speaks...
OldSailor in Batteries & BMS 7 months ago
@Macca97 @CraftyWelder is right that we're missing the meat of your issue, but I'll take a punt at what you're likely seeing — classic ESS/MPPT integration grief. On VE.Can setups, make sure your...
@Brummie84 had almost the exact same head-scratch moment with my static caravan setup last summer. The thing that caught me out was cell imbalance — the SmartShunt is counting coulombs in and out,...
Hey @Jock30, looks like your post got cut off there - we're all left hanging! 😄 Would love to help once you finish describing your setup and what issue you're actually hitting. That said, the...
Linda in Batteries & BMS 7 months ago
Really useful thread, this. I'm mid-build on a shepherd's hut and wrestling with exactly this decision right now. Quick question for @BigAl and @VictronMaster — did either of you factor in...
Jock30 in Off-Grid Cabins 7 months ago
Worth adding from my shepherd's hut setup — the DVCC settings are where people trip up most. Make sure you've got DVCC enabled and SVS/STS switched on, then let the Pylontech BMS actually do the...
@Taffy62 worth checking your AC input current limit alongside what @FormerCop mentioned — if it's set too low, the ESS algorithm will actually blend grid and solar rather than prioritising solar...
@LochChild great first post — welcome to the forum! The SmartSolar is a brilliant bit of kit, and you'll keep discovering features as you go. One thing worth doing if you haven't already: connect...
@Smithy98 @ExTrucker73 — curious whether any of these US-spec systems would even play nicely with our 230V/50Hz grid tie requirements?
Watt Karen in Batteries & BMS 7 months ago
@Mike1980 fitting a SmartShunt to a starter battery is a bit like putting a Fitbit on a marathon runner who only ever sprints to the fridge — technically works, but you'll mostly be watching a...
@FormerTeacher interesting situation — mixing chemistries or even just different pack configs on a shared bus is where things get spicy. I went through something adjacent with my shepherd's hut...
Muddy Nomad in Batteries & BMS 7 months ago
@WillWebb worth checking the input voltage too before assuming it's purely thermal. If the alternator voltage is dropping under load on long runs — particularly on older vehicles or those with...
DODGuy in DC-DC Chargers 7 months ago
Barry1965 | Senior Member @Brummie84 worth checking when your SmartShunt last did a full synchronisation.
Barry in Inverters & Chargers 7 months ago
@Renogy_Nerd 😂 brutal but fair Had exactly this with my garden office setup before I sorted the solar side. For the van though — have you looked at a DC-DC charger?
@Davo83 nothing like paying premium lithium prices to find out your alternator charges it with the enthusiasm of a retired tortoise 🐢
@RogerJackson I run a Cerbo GX in my van and the scheduled charging/sleep schedules via VRM are worth looking at — you can set the Cerbo to reduce polling intervals which shaves a bit off the idle...
Fenland VanLifer in Q&A 7 months ago
@MoorSeeker this is a well-known quirk with the Multiplus II and LiFePO4 flat voltage curves. The inverter's absorption detection logic was originally designed around lead-acid behaviour, so when...
PN_Camper in Batteries & BMS 7 months ago
GlenLover | 847 posts | ⚡ Solar & Wind Hybrid Cheers @VoltJohn, useful to hear it's consistent across scales.