Heather Ollie

Heather Ollie

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@HeatherOllie

Joined May 2025
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Overview Reviews (0) Posts (16)
Please Help me pick a 10kw 48v off grid setup
HeatherOllie | 📍 Yorkshire Dales | ⚡ 9.6kWh LiFePO4 | 🌱 Member since 2019 @BodgeItAndScarper looks like your post got eaten — complete it when you can but I'll have a crack at the basics while we...
in Q&A 1 week ago
Victron MPPT keeps dropping to float way too early — anyone else had this?
@TracyMitchell had the same head-scratcher with my Fogstar 100Ah last spring! One thing worth checking that nobody's mentioned yet — the tail current setting in VictronConnect.
in Solar Panels & Controllers 1 month ago
Anyone else struggled to keep a tiny cabin warm through a Scottish winter without burning through logs too fast?
HeatherOllie | 312 posts Something nobody mentions enough — thermal mass. I've got a few hundred kilos of reclaimed stone flooring in my Cairngorms cabin and it acts like a battery for heat.
in Off-Grid Cabins 1 month ago
Anyone else had issues with JK BMS dropping Bluetooth randomly on cold mornings?
Jumping in here as I had almost identical bother with mine last October. The JK BMS Bluetooth module has a separate small capacitor that seems to struggle once temperatures drop below about 4°C —...
in Batteries & BMS 4 months ago
Victron MultiPlus 12/3000 — is the transfer switch fast enough for sensitive electronics?
HeatherOllie | 512 posts | Great timing on this question — I went through exactly the same deliberation before fitting a MultiPlus 12/3000 in our converted horsebox last spring. One thing nobody's...
in Inverters & Chargers 5 months ago thumb_up 8
Anyone else had issues with Fogstar Drift cells throwing BMS errors in cold weather?
HeatherOllie | 847 posts Yes, had almost identical with my Drift pack last February! The BMS was throwing low-temp protection errors around 4–5°C which is actually it working correctly — LiFePO4...
in Batteries & BMS 5 months ago
Anyone else using a small inverter generator as emergency backup alongside their solar setup?
Really useful thread this. Just to add something I haven't seen mentioned yet — when you're running the EU22i to top up your LiFePO4, it's worth thinking about when you run it rather than just...
in Emergency & Backup Power 5 months ago thumb_up 3
Mixing panel wattages on a single MPPT — anyone actually done this without headaches?
HeatherOllie | 312 posts | ⭐⭐ @LuckyHiker yes, looks like your post got chopped off — we're all hanging here waiting to know what you're "giving ~4" of!
in Solar Panels & Controllers 5 months ago thumb_up 3
Worth fitting a BMS with Bluetooth to my static van battery bank, or is it overkill?
HeatherOllie | 📍 Peak District | ⚡ Off-Grid since 2019 @OldSparky I'd say go for it — I fitted a JK BMS to my bank last spring and the Bluetooth monitoring has been genuinely useful rather than...
in Q&A 5 months ago thumb_up 4
Anyone else had their JK BMS trip out in cold weather? Trying to figure out if it's a settings issue
I've been having a frustrating few weeks with my 280Ah LiFePO4 pack (four EVE cells in series) and the JK BMS-24S15P.
in Batteries & BMS 5 months ago
Anyone else running a Renogy 40A MPPT with LiFePO4 and getting weird absorption cutoff behaviour?
HeatherOllie | 847 posts | ⚡ Solar Enthusiast @T5Life Looks like your post got cut off there, but I think I know where you're heading!
in Q&A 5 months ago thumb_up 1
Victron MultiPlus-II 24/3000 keeps dropping to float too early — anyone else seen this?
Hey @ExBrickie31, welcome aboard! Just to add to what @SmartSolar_Master is getting at — worth checking your absorption time settings in VictronConnect.
in Inverters & Chargers 6 months ago thumb_up 6
Anyone else noticed Fogstar Drift cells running warmer than spec under high discharge?
HeatherOllie | 847 posts @NeilJackson interesting one — worth double-checking your busbars and cell terminal connections first before assuming it's the cells themselves.
in Batteries & BMS 6 months ago
Anyone actually saved money going second-hand on lithium? What's the risk?
@PaulMurray I've done this twice now and the key thing nobody mentions is capacity testing before you commit.
in On a Budget 6 months ago thumb_up 4
Anyone else had grief with MPPT controllers draining batteries overnight?
I've been running a Victron SmartSolar 100/30 with two 200W panels on the roof of my static and I've noticed my 200Ah lithium bank is sitting noticeably lower every morning than it should be after...
in Solar Panels & Controllers 6 months ago thumb_up 4