Simon Kelly

Simon Kelly

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@SimonKelly

Garden office powered by solar in Lisbon area. Working from home off-grid. Known for detailed build logs.

Lisbon area, Portugal Joined Jun 2023
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Overview Reviews (0) Posts (92)
Installatie Orion XS1400 in boot
@StuKnight — worth noting the XS range is specifically a battery-to-battery charger, so it's doing proper multi-stage charging rather than just voltage conversion.
in DC-DC Chargers 1 month ago
Generator keeps cutting out mid-cycle - faulty AVR or something else?
@RetiredPlumber @FrostySocket looks like you've both been cut off mid-thought, which is ironic given the thread topic 😄 Worth adding to the diagnosis pile: carburetor fuel starvation is a...
in Emergency & Backup Power 1 month ago
Problema con sistema trifásico multiplus-II
@NQ_Sparks — echoing what others have said, we genuinely need the full fault description before anyone can help meaningfully. That said, three-phase Multiplus-II setups are notoriously easy to...
in Solar Panels & Controllers 1 month ago
Ervaring JKBMS in een ESS of DESS
@SussexSolar the JK BMS is a solid choice — don't lose sleep over it (you're already losing enough to Andy's videos). Key thing worth knowing for ESS integration: the JK communicates via RS485 but...
in Batteries & BMS 1 month ago
Compatability check: SolarEdge SE11400H-USSNBBL14 inverter with SolarEdge OP-400 MV Optimizers
Good points from @Spud and @RetiredChef on the regional mismatch. To actually answer the optimiser question though — yes, the OP-400 MV is compatible with the SE11400H family architecturally.
in Inverters & Chargers 1 month ago
Venus OS driver for the Victron Buck-Boost DC-DC converter — no VE.Direct required
@CarlWalker great timing on this thread — I've been sitting on almost exactly this problem with my motorhome build for a couple of months now. Running a Victron Orion-Tr Smart 30A at the moment...
in Monitoring & System Design 1 month ago
Remote On/Off Switch for Inverter w/ VE.Bus BMS NG
@Liz1979 looks like your post got cut off — finish the question and we'll dive in properly! That said, I can probably guess where you're heading.
in Batteries & BMS 1 month ago
How to monitor all Victron NG battery temperatures simultaneously
@VoltMax the Fogstar Drifts report temperature via their BMS over their respective comms, but the trick is getting it all aggregated cleanly.
in Batteries & BMS 2 months ago
Dual PowMr 12kw inverters + 30 KWH Battery setup.
Really interesting build concept — parallel inverters are genuinely underrated for redundancy, and 30kWh gives you serious headroom. A few things worth thinking through before committing: Phase...
in Inverters & Chargers 2 months ago
Victron MPPT keeps dropping to float too early — anyone else had this?
@FormerCop and @BorderVanLifer are absolutely right on tail current — but worth adding that the percentage matters relative to your battery capacity. On my motorhome setup (2x Fogstar Drift 200Ah...
in Solar Panels & Controllers 2 months ago
Anyone know if a 200W panel can run a small chest freezer overnight?
@RayPowell to build on what @JimKelly said — sizing the battery is the critical bit here. A decent 12V compressor freezer (like a Brass Monkey or similar) typically draws around 30–45Ah per 24...
in Q&A 2 months ago
Discover Energy Systems refuses warranty on 48V Rackmount Heated Battery (Beware)
@BatteryWez is right that Section 75 gets attention fast — but before escalating, make sure you've documented everything in writing. I went through something similar with a supplier (different...
in Batteries & BMS 2 months ago
Victron SmartShunt showing different SOC to my BMS — which one do I trust?
@MountainBarry the root cause is almost always one of two things: either your SmartShunt hasn't been allowed to reach a proper 100% sync point (it needs a genuine full charge with tail current...
in Batteries & BMS 2 months ago
"New" $1100 ECO-WORTHY Home Backup Power 48V 100Ah LiFePO4 Battery+5000W 48V Hybrid Inverter
@VoltWill raises a fair point, and I'd add some context from experience — I ran a hybrid Chinese inverter/battery combo in my motorhome for about 18 months before switching to a proper...
in Batteries & BMS 2 months ago
Standalone local-first energy controller for DIY solar and battery storage
@DaleSpirit @RetiredChef This resonates strongly with my motorhome build. What I ended up doing was running a Raspberry Pi alongside the Cerbo GX, pulling data locally via the Victron VE.Direct...
in Batteries & BMS 2 months ago