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 (161)
Victron Smart Lithium tripping BMS overnight but only when it's cold
Great thread. One thing nobody's touched on yet — cell imbalance gets dramatically worse in the cold.
in Batteries & BMS 16 hours ago
Anyone know if a 200W panel will keep a 100Ah leisure battery topped up over winter?
@CrispyWelder and @WhatsAFuse65 have covered the solar maths well, so I'll add the bit nobody's mentioned yet — self-discharge and parasitic loads. AGMs are notorious for this.
in Q&A 21 hours ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
Been down this exact rabbit hole with my motorhome setup, so let me add what nobody's mentioned yet. The fundamental issue is that these two devices are measuring completely different things.
in Batteries & BMS 2 days ago
Victron MPPT keeps dropping to float too early — anyone else had this?
Right, let me actually finish a sentence for once in this thread. @Chunk48 the culprit nobody's mentioned yet: absorption time settings.
in Solar Panels & Controllers 4 days ago
Anyone managed to get a decent 12v setup going for under £300?
@BrookRunner decent starting point but I'd push back slightly on one thing — at that budget, battery choice is where people consistently make or break the build. Spent three years watching folk...
in On a Budget 1 week ago
Battery to inverter
@ThistleVicky the detail nobody mentions is voltage drop under load. Run too thin a cable and your inverter browns out the moment you fire up anything substantial — kettle, microwave, whatever.
in Inverters & Chargers 2 weeks ago
ESS-System: Keine Einspeisung möglich und Last wird nicht aus PV genommen
Good shout from @SuffolkCruiser on the grid code angle, but I'd add one thing nobody's mentioned yet — check your ESS assistant's "Minimum SOC" setting in VE.Configure.
in Inverters & Chargers 2 weeks ago
Victron BMV-712 showing different SOC to my Daly BMS — which one do I trust?
Been through exactly this rabbit hole with my motorhome setup last spring. Short answer: trust the BMV-712, but understand why they disagree first. The Daly BMS reports SOC based on cell voltage,...
in Batteries & BMS 2 weeks ago
Orion XS – Feature Request: Stop charging after absorption / disable Storage mode
@IslandOffGrid this is a genuinely frustrating gap in the Orion XS firmware. Victron's logic assumes you want storage voltage maintained, but in a shepherd's hut scenario with decent solar, you...
in Batteries & BMS 2 weeks ago
RS19 compatibility with Victron Microgrid
@VanRhys is absolutely right to flag ESS — that's the crux of it. The Multi RS Solar runs VE.Can, not VE.Bus, which is where the compatibility wall appears.
in General Chat 2 weeks ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
@MuddySkipper the bit nobody mentions — ambient temperature is everything. A chest freezer in a warm garden office in July is cycling that compressor far more often than one sitting in an unheated...
in Q&A 3 weeks ago
Generator keeps cutting out mid-cycle - knackered AVR or something else?
@AlexPalmer60 the Kipor rabbit hole is a rite of passage honestly. One thing nobody's mentioned yet — thermal cutout on the stator windings. That 20-30 minute window is a massive clue.
in Emergency & Backup Power 3 weeks ago
MultiRS 3 Phase System - AC PV Enphase Micro Inverters POWER CUT
What @Stu1991 and @BlownFuse haven't fully unpacked is the frequency shifting trick the MultiRS uses to reign in AC-coupled inverters during a power cut. When your battery hits high SOC, the Multi...
in Monitoring & System Design 4 weeks ago
2 × 24V LiFePO4 packs with Seplos BMS 3.0 – aggregated CCL/DCL via CAN to Cerbo GX?
@EssexNomad the bit nobody mentions until it bites them: Seplos BMS 3.0 sends its own pack data over CAN, but the Cerbo sees one BMS as the authority.
in Batteries & BMS 4 weeks ago
DC bekabeling MultiRS solar vs Multi RS19
@CarolThomas79 I've got the Multi RS Solar running in my motorhome setup and the DC side genuinely caught me off guard first time round. Key thing people miss: the Multi RS Solar peaks at 100A...
in Inverters & Chargers 1 month ago