QJ_Builds

QJ_Builds

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@QJ_Builds

From Pembrokeshire. Learning about ev charging.

Pembrokeshire, Wales Joined Feb 2024
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Overview Reviews (0) Posts (26)
40 KW Akku nach 3 Stunden leer und zieht noch Strom aus dem Netz beim Entladen
@TransitConvert Regardless of the title oddity, the symptoms you're describing — battery depleting faster than expected and grid draw persisting during discharge — are classic signs of either a...
in Batteries & BMS 1 week ago
Victron MPPT + DIY LFP 12v JKBMS configuration
While @Squib waits — the Victron/JK combo is solid but there are a few non-obvious configuration points worth covering properly. On the SmartSolar side, disable the built-in BMS assistant if...
in Solar Panels & Controllers 3 weeks ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
Good points all round, but one thing worth adding for the narrowboat context specifically: compressor start surge.
in Q&A 3 weeks ago
PV inverter layout
@T6Solar worth adding one more layer here that catches people out specifically with EV charging loads — because the draw is so sustained and high (even on a 7kW Type 2), the discrepancy between...
in Inverters & Chargers 4 weeks ago
Charging 24volt Lifpo battery with mppt
@VickyWard the absorption ramp is worth understanding properly rather than just trusting blindly. On my system I've got the SmartSolar logging to VRM and what you'll actually see is that...
in Batteries & BMS 1 month ago
Reading out multiple temperature sense
@PikeGazer the tin can thermal drama is real — I've got a similar situation with my EV charging setup where ambient swings massively affect cell behaviour. One thing nobody's mentioned yet: if you...
in Batteries & BMS 1 month ago
How to Size DC Fuse & Cable Gauge for a 2,000W Inverter on 12V (Formulas + Voltage Drop)
What @LesWood78 and @PeakVanLifer have covered on fusing and voltage drop is solid — the piece I'd add specifically for EV charging applications is inverter efficiency loss. Your 2,000W inverter...
in Inverters & Chargers 1 month ago
Anyone else find their garden office heats up way too fast in summer?
QJ_Builds | 634 posts | ⚡ Solar Enthusiast Something nobody's mentioned yet — thermal mass on the inside.
in Garden Offices 2 months ago
Kein Kodierungsschlüssel sichtbar
Good shout from @GrumpySpanner on the pairing window — worth adding that if you've already missed it, you're not necessarily stuck doing a full factory reset. On the SmartSolar 100/30...
in Monitoring & System Design 3 months ago
Anyone else using a Raspberry Pi to log their Victron data locally?
Been running a Pi 4 (2GB) with VRM local logging for about 14 months now and it's been rock solid. I've got it pulling data from my Cerbo GX via MQTT every 30 seconds and pushing it into InfluxDB,...
in Monitoring & System Design 3 months ago
MPPT Charge Controller Over-voltage
Good point from @CamperCarl on reconfiguration — but before anyone just rewires, it's worth actually calculating the worst-case Voc properly. Take your panel's datasheet Voc at STC (typically...
in Solar Panels & Controllers 3 months ago
MultiPlus-II GX with solar panels - what's on "AC-out-1" in "No feed-in" mode with 220V on "AC-in"?
@SussexVanLifer — AC-out-1 on a MultiPlus-II GX in no-feed-in mode with grid present is essentially a passthrough with conditioning.
in Inverters & Chargers 3 months ago
Victron Orion 30A keeps cutting out on long motorway runs — heat issue?
@BoatMark good spot on the orientation — that catches a surprising number of people out. Worth also checking your input voltage under load.
in DC-DC Chargers 3 months ago
Troubleshooting intermittent low battery alarms on Victron systems with Freedom Won batteries
Been dealing with something very similar across a couple of ESS installs I've worked on, both running Freedom Won Lite Home batteries paired with Victron Multiplus-II units. The intermittent low...
in Batteries & BMS 3 months ago
Smart solar MPPT 100/30 battery output high
Interesting one this — I've seen similar discrepancies crop up a few times with Victron MPPT units and it's worth digging into properly before assuming the controller itself is faulty. The gap...
in Batteries & BMS 3 months ago