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Got me thinking about my own 24v setup actually. Running two 12v lead acids in series and heavy discharge cycles are definitely where balancing becomes a real headache. Had a similar situation a...
Wayne in Inverters & Chargers 1 month ago
Great thread this. @DazHenderson77 worth checking whether that 0.08V difference persists right through the charge cycle or only shows up at certain SOC levels.
Same experience here. Standing charges are the real killer — mine have crept up to nearly 65p/day now, and that's before a single unit of grid power is drawn.
Meadow Dweller in General Chat 1 month ago
@DodgyMechanic @24V_Nerd right, and don't forget the real calculation nobody mentions — 40 panels at any wattage divided by the cost of a transatlantic flight, plus shipping, import duty, and the...
Been running a Victron ESS setup with a Fronius Symo on AC Out for about 18 months now and this is something that's genuinely been bugging me.
Got a similar dilemma at the moment so following this thread closely. My setup is purely for emergency backup — mainly keeping a few lights going, charging phones, and running a small 12V fan if...
WheresMeWires31 in Q&A 1 month ago
@WillReid the pairing issue between a BlueSolar PWM and a BatteryProtect is a classic one — the BP isn't designed to interrupt charge current, only load-side discharge.
@TracyAllen don't be too hard on yourself — 50mm in a 2x4 frame isn't a write-off if you haven't boarded the interior yet.
Fenland Solar in Garden Offices 1 month ago
@BurnGlen classic winter problem this. A B2B charger (DC-DC) made a massive difference on my setup — pulls a proper controlled charge from the alternator even on a 20 min run.
@BoatFinn the 100A output is the bit worth thinking about. On my boat setup I never actually hit that ceiling — panels rarely do.
@DevonDweller this is really timely — I've been eyeing up exactly this combination for my narrowboat! Quick question though: are you using CAN bus or RS485 to get the JK talking to the Solis?
Linda Clark in Batteries & BMS 1 month ago
@LisaKelly66 had the exact same faff with my van build — turned out my VE.Direct cables were playing musical chairs and the Cerbo thought it was in charge of everything including my morning brew...
Both posts above have covered the MPPT matching side reasonably well, so I'll add something slightly different. On a 48V system with split arrays, watch your open-circuit voltage carefully during...
Good points all round from @SolarTrevor and @Drift_Geek. One thing worth adding — don't forget the temperature coefficient on your panels' Voc rating.
Norfolk Boater in Q&A 1 month ago
Yeah mine does this on the boat too — drove me mad until I worked out the cupboard I'd mounted it in was basically acting like a little oven 🙄 Moved it so there's actual airflow behind it and the...
Bay Lisa in General Chat 1 month ago
Ha, love the chain of cliffhangers here 😄 Right, I'll actually finish my thought before hitting post... For my garden office I used MCM cable glands (the proper IP68 rated ones, not the cheapo...
ExJoiner6 in Garden Offices 1 month ago
Great topic @CumbrianWanderer. Worth checking whether you've got the MPPT networked into the Multiplus II GX via VE.Direct or VE.Smart networking, because if it's operating standalone it'll be...
Boxer Life in Batteries & BMS 1 month ago
Worth adding that on the SPF 6000 ES specifically, you need to make sure the battery type is set to "LIb" (option 5 in Programme 36 on most firmware versions) rather than leaving it on a...
Volt Kev in Batteries & BMS 1 month ago
@BayLisa One thing worth checking that hasn't been mentioned — make sure your three MP2s are all showing the correct phase assignment in VEConfigure.
Nick Thompson in Q&A 1 month ago
@ExSquaddie49 is right, and I learned this the hard way 😅 — my single 400W panel basically becomes an expensive roof ornament in January.
Wonky Skipper in Q&A 1 month ago