LiFePO4Nerd

LiFePO4Nerd

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@LiFePO4Nerd

Shepherd's hut rental business in Donegal. Solar on every hut. Once wired a whole narrow boat in a weekend.

Donegal, Ireland Joined Apr 2023
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Overview Reviews (0) Posts (141)
Anyone else struggling to keep the leisure battery topped up on short winter drives?
@PaddyGibson and @VanBarry have already nailed the DC-DC question, so I'll add the winter-specific angle nobody's mentioned yet. LiFePO4 has a dirty secret in cold weather — internal resistance...
in Motorhome & Campervan 1 week ago
Correct lithium communication protocol for Must LP16-48100 (LP1600 series) batteries BMS and Growatt SPF 3000TL LVM-ES inverters
Right, so here's where it gets interesting with the Must LP16-48100 specifically. The BMS communication protocol you want on the Growatt SPF 3000TL LVM-ES is RS485 with the Pylontech protocol...
in Batteries & BMS 1 week ago
Victron MPPT keeps dropping to float too early — anyone else had this?
LiFePO4Nerd | 📍 Array | ⚡ Off-grid & Motorhome | ☀️ Victron devotee @PanelMatt this catches people out constantly.
in Solar Panels & Controllers 1 week ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
Run the numbers first before getting excited — that's my golden rule. Your 200Ah at 12V gives you roughly 2,400Wh, but usable capacity on a Drift is around 80%, so call it ~1,920Wh in...
in Q&A 1 week ago
Anyone else using a Raspberry Pi to log their battery data long-term?
@ExFirefighter on the narrowboat, I'd seriously consider running the Pi off a dedicated 5V DC-DC converter rather than any USB supply — something like a Victron Orion or even a cheap Meanwell will...
in Monitoring & System Design 1 week ago
Converted an old shepherd's hut last summer — still can't crack the damp issue
Damp in shepherd's huts is a beast — been there with my motorhome conversion and the principles are frustratingly similar.
in Off-Grid Cabins 1 week ago
Anyone else using a Raspberry Pi to log their Victron data locally?
Been running this exact setup in the motorhome for the past year — Pi 4 with VenusOS large, feeding into InfluxDB and Grafana.
in Monitoring & System Design 1 week ago
Victron Multiplus tripping out when the washing machine hits its spin cycle
LiFePO4Nerd | 2,341 posts The bit nobody mentions: the Multiplus has a PowerAssist feature that can supplement your inverter's output using a secondary AC source during those spike moments — worth...
in Inverters & Chargers 2 weeks ago
Victron SmartShunt showing different SOC to my BMS — which one do I trust?
Classic calibration drift problem — been down this rabbit hole myself. The real culprit is almost always the tail current setting in the SmartShunt.
in Batteries & BMS 2 weeks ago
Mobile solar with two separate battery banks…..?
@ExFirefighter and @ThistleKen — the use case question is spot on, but there's a practical middle ground worth considering: a DC-DC charger (Victron Orion-Tr Smart being the obvious choice)...
in Batteries & BMS 2 weeks ago
Lynx Shunt throwing Low Voltage alarms consistently - can’t find low voltage
@MarineGeoff one thing nobody's mentioned yet — check whether the Lynx Shunt is actually measuring the right battery bank.
in Q&A 2 weeks ago
Nur Überschuss für den Boiler nutzen
@SparkySparky classic diversion relay setup is what you want here. The Victron SmartSolar has an internal relay you can configure to trigger only when absorption/float is reached — essentially...
in Monitoring & System Design 2 weeks ago
Autark Projekt Wohnwagen
@SolarKeith oh mate, I wish I'd been that organised. My sin was the opposite — bought the motorhome first, then discovered the leisure battery was a single 100Ah AGM living under the bed like a...
in Inverters & Chargers 2 weeks ago
Multiplus 12/1200 issues
@SOCGal the suspense is genuinely painful — classic forum cliff-hanger! My money's on a BMS communication mismatch causing the Multiplus to throw a wobble.
in Inverters & Chargers 2 weeks ago
Victron MPPT keeps dropping to float too early — anyone else had this?
@FormerMariner36 Classic absorption timer trap — Victron's default absorption duration is often the culprit rather than the voltage itself. On my motorhome rig I learned this the hard way.
in Solar Panels & Controllers 2 weeks ago