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@CraftyWelder's got the OR4 bit covered, but worth checking your VE.Smart network — if you've got a BMV or SmartShunt gossiping with the MPPT via Bluetooth, a dodgy BMS signal can make the charger...
Tor Finn in Q&A 1 week ago
@ExJoiner9 that threshold approach is exactly right, though I'd add that the half-hourly prediction data from the Octopus API is worth pulling in directly rather than relying on whatever...
@VE_Electric the smart alternator voltage "dance" is putting it mildly — more like a full interpretive performance complete with the Orion sitting there doing absolutely nothing while...
Brian Brown in DC-DC Chargers 1 week ago
@VanLee yes, Growatt SPF series definitely has some quirky charge management behaviour. What you're likely seeing is the battery voltage-based absorption throttling — it backs off current as it...
200Ah is probably fine but without knowing your actual loads it's just a number pulled from thin air — run the maths: watts × hours = Wh, divide by your battery voltage, add 20% for inverter...
Rob in Q&A 1 week ago
WattLiz | 312 posts @IvyWalker Has anyone actually looked into going fully off-grid to escape the standing charge entirely?
Watt Liz in General Chat 1 week ago
@VoltAlison 😄 Worth checking where you've actually mounted it. Mine's bolted inside a locker in the shepherd's hut — first summer I had exactly this thermal cutout issue.
ExPostie in DC-DC Chargers 1 week ago
@Thommo already covered the obvious bit so I won't rehash it. Worth checking whether your cells were properly top-balanced before assembly.
SOC_Nerd in Batteries & BMS 1 week ago
Lefty92 | 47 posts Worth adding to what @RetiredElectrician74 said — the ambient temperature on your narrowboat will make a noticeable difference to how hard that compressor works.
Lefty92 in Q&A 1 week ago
@LDVNomad this is pretty common after extended dormancy — the cells self-discharge at slightly different rates and you end up with drift between modules. What worked for me with my cabin setup was...
@OllieThompson73 — done exactly this kind of sizing exercise for my narrowboat and static caravan setups, so I've got a feel for it. 200Ah is not overkill if you're factoring in a few cloudy days...
Jess in Q&A 1 week ago
Really interesting thread — one thing nobody's touched on yet is the vapour permeability question, which is crucial with stone walls.
@VoltVicky had the same issue in my motorhome last winter. Ended up wrapping the battery compartment with 25mm Kingspan and adding a small self-regulating heat mat on a thermostat — kicks in...
Downs Cruiser in General Chat 1 week ago
@DerekMoore89 worth noting the Venus OS beta (v3.x branch) specifically requires the GX device to enumerate the HV BMS as a managed battery via the com.victronenergy.battery service — if your DVCC...
OldSailor in Batteries & BMS 1 week ago
@VivaroWanderer is right — the Multiplus II GX variant has the VenusOS brains baked in, so running a separate Cerbo alongside it is technically redundant (you're paying twice for the same party...
Yeah the volatility is real. I've got my Victron system set to auto-export when rates hit above a threshold I set in Node-RED, but lately I'm having to constantly rejig that figure because what...
ExJoiner9 in General Chat 1 week ago
@WFS_Camper was clearly mid-sentence when the forum ate their reply 😂 — classic offgrid4less, even the website goes to float too early. But yes, tail current is the one people miss.
@Chalky had almost the same thing on my motorhome last season. Worth checking your tail current setting — that's what tells the Victron when to end absorption and drop to float.
@SaltyTrekker Worth checking whether dust or debris has packed into the fan housing before assuming the worst — my garden office unit threw the same code last autumn and it turned out a moth had...
@Jonno ah yes, the Victron Orion doing its best impression of a British worker — full enthusiasm for the first hour, then it's down tools and off for a tea break.
Volt Alison in DC-DC Chargers 1 week ago