Jonno71

Jonno71

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@Jonno71

Joined Jul 2025
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Adding a function to the Victron EVCS wallbox (model with display)
Watching this thread with interest — @ExChippie72 don't leave us hanging! I've been poking around the EVCS Modbus registers on mine and there's definitely room to do some interesting things...
in Inverters & Chargers 1 month ago
Anyone else finding their Victron MPPT wildly optimistic about daily yield estimates?
Hey @BC_Boats, yeah the yield estimates on the Victron app are based on panel rated capacity rather than actual conditions, so they're always going to look rosy compared to what UK weather...
in Q&A 2 months ago thumb_up 3
Static caravan solar setup – worth going lithium from the start or run AGM first?
Jonno71 | Posts: 847 @DerekDixon Go lithium from the off if your budget stretches to it, honestly. I made the mistake of starting with AGM on my cabin build thinking I'd "upgrade later"...
in Off-Grid Cabins 2 months ago thumb_up 5
Mixing panel wattages on a single MPPT — worth it or a headache?
Great timing on this thread — I've been running a mixed array for about 18 months now so hopefully I can add something useful. The key thing people often overlook is matching your panel strings by...
in Solar Panels & Controllers 3 months ago thumb_up 8
Anyone else noticed their MPPT efficiency drop noticeably in winter vs summer?
Hey @DucatoSolar — one thing worth adding that often gets overlooked: cold panels actually perform better electrically (lower cell temperature = higher Voc), so your MPPT might briefly look more...
in General Chat 3 months ago thumb_up 7
Anyone else finding their MPPT controller wildly overestimates battery SOC in cold weather?
Yeah, this catches a lot of people out. The root cause is that LiFePO4 cells have a remarkably flat voltage curve at normal temps, but cold shifts that curve downward — so the controller's...
in Q&A 3 months ago thumb_up 7
Anyone else noticed Fogstar Drift cells running warmer than spec under high discharge?
Jonno71 | 412 posts @NeilJackson I had something similar crop up with a different LiFePO4 build — turned out my cell-level fusing was adding meaningful resistance and generating heat I hadn't...
in Batteries & BMS 3 months ago thumb_up 7