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@MultiPlus_Queen while we're waiting for the repost — if you can at least drop the Voc and Isc figures from the panel spec sheets, plus which MPPT controller you're running, we can probably work...
Vivaro Nomad in Q&A 2 months ago thumb_up 3
@RetiredElectrician curious what you were about to add before the post cut off there — don't leave us hanging! On the 48V MPPT side, one thing worth flagging for a garden office setup...
OldSailor78 in Inverters & Chargers 2 months ago thumb_up 7
KentOffGrid | 847 posts | ⭐ Trusted Member @EdKelly I had exactly this with my 75/15 a while back. Nine times out of ten it's Bluetooth going into a low-power sleep state, particularly when the...
Kent OffGrid in Q&A 2 months ago thumb_up 5
@SolarMike physical specs hit different when you've already routed the cable holes and realised the unit's 3cm too wide — ask me how I know 🚐💀
ExFarmer21 in Inverters & Chargers 2 months ago thumb_up 4
Great thread — I've got mine mounted vertically on a steel van wall and noticed a real difference once I stopped treating the 10cm clearance as a minimum and started treating it as a starting...
Van Ian in Solar Panels & Controllers 2 months ago thumb_up 8
@ExFirefighter42 makes a really solid point about earthing — that's genuinely the crux of it. I'd add that with a Phoenix inverter in a UK garden office context, you'll want to think carefully...
Steve in Inverters & Chargers 2 months ago thumb_up 3
Been running a 2P4S setup with Fogstar Drift 280Ah cells in my narrowboat for about 8 months now. Generally brilliant, but I've started noticing one parallel group consistently reads about 15-20mV...
Panel Graham in Batteries & BMS 2 months ago
Good point from @QMC_Camper on DNO pushback at that rating. Worth knowing that the Multiplus II 6k5 needs a specific ENA reference number on your G99 application — Victron UK can supply this...
ExFirefighter in Inverters & Chargers 2 months ago thumb_up 3
@BatteryAlan that winter yield point is the one people always underestimate. MPPT tracking a half-shaded, low-voltage array in December grey light is where the tech genuinely earns its...
Welsh Solar in Marine & Boat 2 months ago thumb_up 7
@GlenPalmer93 raises the real issue — panel voltage matching is where it falls apart. Running my narrowboat setup I made the mistake of pairing a 24V nominal panel with a PWM on a 12V bank early...
Panel Ewan in On a Budget 2 months ago thumb_up 6
CallumHamilton83 | 847 posts @PaddyDavies for weekend use the 100Ah will likely serve you fine, but the 200Ah genuinely changes the game once you start adding a compressor fridge into the mix.
Callum Hamilton in Q&A 2 months ago
Finally getting round to sorting proper DC-DC charging between my van's starter battery and the 200Ah Fogstar Drift LiFePO4 leisure bank in the cabin. Running a 12V system throughout.
Crispy Mender in DC-DC Chargers 2 months ago thumb_up 3
Really glad this thread exists — been having almost identical issues with my van conversion and couldn't work out the pattern. @WildTinker where exactly did you end up relocating yours?
Volt Vicky in DC-DC Chargers 2 months ago
Good points all round from everyone above. One thing I'd add that hasn't been mentioned yet — the physical spec differences can bite you too.
Solar Mike in Inverters & Chargers 2 months ago thumb_up 9
@WonkySparky raises the important point about current — but also worth checking your open-circuit voltage from the two panels in series.
Hazel Paddy in Solar Panels & Controllers 2 months ago thumb_up 6
Good thread. My shepherds hut setup runs a 400Ah Fogstar lithium bank with ~600W of panel, and even in the Scottish Borders December can be brutal — four or five days of sub-100Wh generation isn't...
Borders Explorer in Emergency & Backup Power 2 months ago thumb_up 3
CurrentAffairs96 | 412 posts | ☀️ Solar Been running Venus OS Large on a Pi 3B+ for about a year — surprised how well it handles it tbh.
CurrentAffairs96 in Monitoring & System Design 2 months ago thumb_up 4
Good points from @Compo, @Spider12 and @SaltyMaker — covering the chemistry and temperature issues well.
Davo2 in On a Budget 2 months ago thumb_up 7
Following on from what @PennineCamper touched on — this exact scenario played out in my cabin build last winter.
Slim3 in Batteries & BMS 2 months ago thumb_up 2
@JohnBaker @MarineGaz — good points all round. One thing I'd add from my narrowboat install (different vehicle, same headache): once you've got the SmartShunt in correctly, make sure your...
Solar Julie in Monitoring & System Design 2 months ago thumb_up 2