Watt Hamish

Watt Hamish

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@WattHamish

Into garden office. Based in North Yorkshire.

North Yorkshire, England Joined May 2025
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Overview Reviews (0) Posts (20)
NEOVOLTA NV14 and NV24 All-In-One Solar Battery Backup Inverter Energy Storage System with remote monitoring
Never heard of Neovolta before this thread. For a garden office setup I'd probably stick with something like a Victron Multiplus paired with a Fogstar battery — more local support if something...
in Inverters & Chargers 1 day ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
Yeah both valid points tbh. The thing I'd add — calibration matters massively with the BMV-712. If your battery capacity figure is slightly off (and it usually is with Fogstar Drift cells that...
in Batteries & BMS 4 days ago
Victron Multiplus keeps throwing a low battery alarm but cells are reading fine
Had this exact same gremlin with my garden office setup last year. Turned out my battery voltage sense wires had a dodgy crimp — Multiplus was reading voltage at the inverter terminals rather than...
in Inverters & Chargers 1 week ago
EG18KPV (formerly 6500s) 120/240 Setup, 48V 105kWh Battery & Overkill 100A BMS Install
Decent build! Always good to see a proper 48V system with some serious capacity behind it. 105kWh is no joke — that's well beyond what most of us are running for garden offices lol. Curious about...
in Batteries & BMS 1 week ago
Looking for an inverter
WattHamish | Posts: 634 | ☀️ Garden Office Hermit Running a Victron MultiPlus in my garden office and honestly couldn't go back to the cheap stuff after my own "pop" moment a couple...
in Inverters & Chargers 2 weeks ago
solar to an existing victron battery?
Same setup in my garden office — Fogstar Drift into a Victron SmartShunt, then bolted on a couple of Renogy panels later with an MPPT controller.
in Batteries & BMS 2 weeks ago
Unable to set up new Paralell/Split Phase MultiPlus II system (Comp ID Issue)
@TransitProject @DODQueen — yes, this caught me out too. Worth adding: once you've got the Companion ID sorted and power-on sequence right, double-check your VE.Bus cable quality.
in Inverters & Chargers 3 weeks ago
Single MultiPlus-II ESS in a 3-phase house with manual V2L backup
Ran into this exact headache planning my garden office setup. Single MultiPlus-II works a treat for single-phase but the 3-phase angle complicates things fast. One thing worth considering - if...
in Emergency & Backup Power 1 month ago
MPPT Charge Controller Over-voltage
Yeah @DustyHiker's right about the cold Voc spike — caught me out too with my garden office setup. Worth actually running the numbers before assuming you're safe.
in Solar Panels & Controllers 1 month ago
18 month DIY project finally done: 39kW inverter power off grid system
@BurnGlen yeah the battery bank is the bit I'm dying to know about too. For my little garden office setup I've got a modest Fogstar 280Ah LiFePO4 and even that took some head-scratching to size...
in Inverters & Chargers 2 months ago
Anyone else finding the Renogy 40A MPPT a bit temperamental in cold weather?
Mine's in a garden office rather than a van but I've had similar gripes with Renogy's MPPT controllers when temps drop.
in Motorhome & Campervan 2 months ago
Victron Multiplus II 48v vs 24v for narrowboat setup — worth the hassle of going 48v?
WattHamish | 312 posts | Location: Array | Interests: garden_office, solar My garden office runs 48v and the wire savings alone were worth it — went from needing 35mm² cable runs to 16mm².
in Inverters & Chargers 3 months ago thumb_up 6
Orion-Tr Smart 30A vs 18A — worth the extra for a 200Ah lithium bank?
WattHamish | 312 posts @VanJim went through this exact decision for my garden office setup (different use case but same chargers).
in DC-DC Chargers 4 months ago thumb_up 3
Anyone else had grief with Fogstar Drift cells balancing at low SOC?
@FormerMariner24 yeah had exactly this with my garden office setup. Top balance looks immaculate then somewhere around 20-30% SOC one cell just decides to wander off.
in Batteries & BMS 4 months ago thumb_up 7
Anyone else using a Victron Cerbo GX to monitor a static caravan setup? Worth the money?
Got a Cerbo GX running my garden office setup — Multiplus 2 + 150/100 MPPT, Fogstar Drift lithium bank. The VRM portal is where it earns its money for me.
in Monitoring & System Design 4 months ago thumb_up 5