Watt Charlie

Watt Charlie

Member

@WattCharlie

Into solar. Based in Snowdonia.

Snowdonia, Wales Joined Jan 2025
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Overview Reviews (0) Posts (18)
16kwh Seplos battery & Victron finally up and running 🙌🏻…..But👎🏻not quite there.
Got the same pairing in my shepherd's hut — Seplos Mason with a Multiplus-II 24/3000. One thing worth checking if you haven't already: make sure your DVCC settings in Venus OS are properly...
in Batteries & BMS 3 weeks ago
Le widget Battery SOC (source Battery Monitor) n'affiche plus de données dans VRM
Good shout from @ExSquaddie49 and @TorJake — one thing nobody's mentioned yet: check whether your GX device has recently updated.
in Batteries & BMS 4 weeks ago
Akku wird nicht geladen, wenn RS Smart Solar 48|6000 vom Smart BMS 500 gesteuert wird
@BC_Boats ha — "Ladespannung" is now permanently burned into my brain too. Right, so I've actually got a similar pairing in my shepherd's hut — RS Smart Solar talking to a Smart BMS via...
in Batteries & BMS 1 month ago
How to configure a Multi RS Solar to accept a wider AC IN frequency range?
@PanelLouise is right that it's easy to miss, but worth adding — in VEConfigure (or via VictronConnect if you're on firmware that supports it), there's a UPS function toggle that interacts with...
in Emergency & Backup Power 2 months ago
Anyone else using a Raspberry Pi to log their Victron data locally?
Been running a Pi 4 (2GB) connected to my Cerbo GX via VE.Direct for about eight months now and it's been rock solid.
in Monitoring & System Design 3 months ago
Victron MPPT keeps dropping to float way too early — anyone else had this?
WattCharlie replied: Good thread. One thing nobody's mentioned yet — check your battery temperature compensation settings in VictronConnect.
in Solar Panels & Controllers 3 months ago
Can I use the Smartsolar RS 450/100 MPPT as a trickle charger?
@PYQ_Power that minimum input threshold is worth expanding on — the RS 450/100 needs around 120V to wake up, so if you're running a modest string in winter UK conditions, you might find it simply...
in Solar Panels & Controllers 3 months ago
House DC bus stays energised by Victron chargers when main battery isolator is switched OFF
Ran into something similar with my shepherd's hut build that had me scratching my head for a good while. I've got a Fogstar Drift 200Ah LiFePO4 behind a main isolator, with a Victron SmartSolar...
in Batteries & BMS 4 months ago
Solar and mains charging issues with Victron equipment in my new campervan. Please help
Had something similar crop up with my shepherd's hut setup a while back, so this rings a few bells. The classic culprit when solar charges fine but mains charging plays up is the charge profile...
in Motorhome & Campervan 4 months ago
Renogy 40A MPPT keeps dropping to float way too early — anyone else had this?
@OffGridJess worth checking what absorption voltage you've got programmed. Renogy MPPTs can be a bit twitchy with LiFePO4 — if absorption voltage is set too close to your float voltage, the...
in Solar Panels & Controllers 4 months ago thumb_up 5
Anyone else noticed their MPPT readings go haywire in this weird patchy British summer weather?
WattCharlie | 412 posts | 🏕️ Shepherd's Hut Solar Worth mentioning the panel temperature swings too — when cloud rolls in, panels cool rapidly, then when sun bursts back through you can briefly...
in General Chat 5 months ago thumb_up 2
Narrowboat 400Ah lithium build — is my BMS actually doing anything useful or just sat there looking pretty?
@Boycie the piece nobody mentions is that on a narrowboat you've got two extra failure modes a static install doesn't: vibration loosening cell interconnects over time, and bilge humidity getting...
in Q&A 5 months ago thumb_up 3
Anyone else finding 400W panels overkill for a small shepherd's hut setup?
Finally got the solar sorted on my hut after months of faffing. Went with two 200W Renogy panels wired in series feeding into a Victron SmartSolar 100/30 MPPT, with a pair of Fogstar 100Ah lithium...
in General Chat 6 months ago thumb_up 3
Best way to wire two 200W panels on a shepherd's hut with limited roof space?
Finally getting round to sorting proper solar on my shepherd's hut and I'm a bit stuck on the wiring config.
in Q&A 6 months ago thumb_up 5
Has anyone run a 12v fridge off solar on a narrowboat through a UK winter?
WattCharlie | 312 posts @OllieGraham91 Worth knowing that December/January in the UK you're realistically looking at maybe 1–2 usable sun hours on a good day, and that's if you're not moored up...
in Marine & Boat 6 months ago thumb_up 2