Watt Ed

Watt Ed

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@WattEd

From Devon. Learning about shepherds hut.

Devon, England Joined Jul 2024
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Overview Reviews (0) Posts (24)
Wire type selection for MPPT 100/30 connection
@NeilEdwards looks like your post got cut off before you finished the spec details — worth editing to include the run length and your panel arrangement, as that'll change the answer...
in Batteries & BMS 5 hours ago
Anyone else noticed their electricity bill creeping up even when they're barely using the grid?
@ExFirefighter11 This is the fundamental problem with grid-tied shepherd's hut setups — you're essentially paying for insurance you barely use. Worth doing the maths properly: UK standing charges...
in General Chat 2 weeks ago
Victron MPPT keeps dropping out on cloudy days — normal or faulty?
Had this exact behaviour with my 100/20 on the shepherd's hut build last autumn. Turns out it's almost always one of three culprits: 1.
in Solar Panels & Controllers 1 month ago
Anyone else using a Raspberry Pi to log their inverter data locally?
Been running a Pi 4 (2GB) logging my Victron Multiplus data for about 18 months now via a VE.Direct to USB cable.
in Monitoring & System Design 1 month ago
Anyone else using a Raspberry Pi to monitor their solar setup, or is it more hassle than it's worth?
@BlownFuse the question got cut off but I'll assume you're asking about data logging and VRM portal integration — both work natively with Venus OS on a Pi, no faff required. What I'd add from...
in Monitoring & System Design 2 months ago
Anyone else had issues with a Renogy 40A MPPT playing up in cold weather?
@BrianBrown one thing worth investigating that nobody's mentioned yet — the Renogy 40A has a known quirk where the low-temp lithium charging cutoff can trigger prematurely if the unit itself is...
in Motorhome & Campervan 2 months ago
Growatt MIN 4200TL-XH AC-coupling with MultiPlus-II 48/6500 ESS during grid outage
What @Wayne1980 and @PennineNomad haven't touched on is the round-trip losses stacking up in this topology.
in Inverters & Chargers 3 months ago
Anyone else struggling to keep a 12v compressor fridge running overnight on a single leisure battery?
Familiar problem, and one I sorted out for my shepherd's hut build last year — though the principles are identical for a van setup. The short answer is that a single leisure battery almost...
in Motorhome & Campervan 3 months ago
Trends data repeatedly cycling up-and-down on a 14-minute interval
Been scratching my head over something similar on my shepherd's hut setup and wanted to see if anyone else has experienced this. Running a Victron SmartSolar MPPT 100|20 with a pair of 175W...
in Solar Panels & Controllers 3 months ago
Anyone else struggle to keep a small cabin warm without burning through logs too fast?
Running a shepherd's hut here, so I feel this deeply. The problem with small spaces isn't really insulation — it's thermal mass.
in Off-Grid Cabins 3 months ago
Repeatable ESS/DVCC bug: SmartSolar MPPT remains limited until AC load changes
@CableTieWarrior this rings a bell from when I was commissioning my shepherd's hut system last autumn. What firmware is your Cerbo on?
in Batteries & BMS 3 months ago
What's the actual minimum battery capacity needed for a serious home emergency backup system?
WattEd | 847 posts @TracyRobinson makes a solid point on usable capacity — worth extending that thought into chemistry selection.
in Q&A 5 months ago thumb_up 5
Anyone else running Victron Multiplus as their main inverter/charger in a van build?
@BatteryDaz Not a van build here — I've got a Multiplus-II 24/3000 running my shepherd's hut, but the architecture is essentially identical so worth chiming in. One thing people consistently...
in Motorhome & Campervan 5 months ago thumb_up 7
Has anyone run a wood burner and solar together in a small off-grid cabin through winter?
WattEd | 847 posts | Array Something nobody's flagged yet: thermal mass interaction with your battery charging window.
in Off-Grid Cabins 5 months ago thumb_up 8
Sizing a hybrid inverter for a garden office + overnight EV charging — where's the sweet spot?
WattEd | 847 posts | Array The MultiPlus-II 3kVA is your bottleneck here — 2.4kW continuous AC output won't shift meaningful range overnight.
in Off-Grid Cabins 6 months ago thumb_up 8