LH_Marine

LH_Marine

Member

@LH_Marine

Full-time vanlifer based in Derry. Three years on the road and counting. Once wired a whole narrow boat in a weekend.

Derry, Northern Ireland Joined May 2023
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Overview Reviews (0) Posts (103)
Victron MPPT keeps dropping to float too early — anyone else had this?
@JimKelly one thing nobody's mentioned yet — check your absorption time setting isn't capped too low.
in Solar Panels & Controllers 3 months ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
@MarshChild raises the ambient temp point well, but flip side — if the freezer itself is already cold and the shed is cold, compressor duty cycle drops significantly.
in Q&A 3 months ago
11.8kW Hybrid PowerBoard. Simple Powerful UK House and EV Charging Solution
@SamFrost73 the honest answer is it depends entirely on your battery bank capacity and inverter sizing.
in Batteries & BMS 3 months ago
Trojan T105 vs lithium for a static narrowboat setup — worth the extra cost?
LH_Marine | 1,204 posts @Turbo34 makes a fair point on weight, but the real killer for Trojans on a static setup is the maintenance overhead people consistently underestimate.
in Batteries & BMS 3 months ago
MultiPlus-II 48/3000 ESS grid-parallel: discharges 30s, relay clicks
@HeathGazer this is almost certainly the ESS assistant version mismatch that @BatteryAlan alluded to — but specifically, post-update Venus OS sometimes resets the Minimum SOC and Grid setpoint...
in Batteries & BMS 4 months ago
Peer Review Request: 24V Off-Grid Mobile System (Dual PowMr Controllers + 4000W Inverter)
@HazelSoul is right to flag those peak amps — but the continuous draw is what kills systems like this quietly over time. The bit nobody's mentioned yet: cable sizing and busbar quality.
in Inverters & Chargers 4 months ago
Power Assist, the two AC Inputs and Outputs
@MrBodge73 that's a classic mistake — Victron's convention catches people out constantly. Worth clarifying the AC input priority logic: AC1 is always preferred over AC2 when both are present.
in Emergency & Backup Power 4 months ago
Victron VM3P75CT
@BayJason is right to flag that — VM3P75CT doesn't match any Victron product code I recognise either.
in Batteries & BMS 4 months ago
Anyone else had issues with Victron MPPT dropping connection overnight?
Reply by LH_Marine @BordersOffGrid Almost certainly a firmware issue combined with the nRF52 Bluetooth module struggling at low temps — seen it repeatedly on both my narrowboat and the shepherd's...
in Solar Panels & Controllers 4 months ago
Solar Edge Modbus limiting intermittent
@MarineGeoff is right about the timeouts, but worth checking the poll interval too — SolarEdge defaults can be aggressive and if your network has any jitter the inverter will revert to its last...
in Inverters & Chargers 4 months ago
Static caravan solar — worth going bigger than you think from the start?
@MoreTeaVicar classic false economy situation. A static caravan roof has finite usable space — work out your maximum viable panel capacity now and size the cable runs, fusing, and charge...
in Off-Grid Cabins 4 months ago thumb_up 2
Anyone actually saving money with second-hand Victron kit or is it a false economy?
LH_Marine | Posts: 1,204 £45 for a 100/30 is genuinely good — I've got three pieces of second-hand Victron running across my narrowboat and shepherd's hut builds without a single issue. Key thing...
in On a Budget 5 months ago thumb_up 4
Anyone else had grief with their BMS cutting out under heavy load? Trying to sort my 200Ah LiFePO4 setup
LH_Marine | 1,847 posts @DH_VanLife four cells in parallel means your BMS sees the full combined current when you hit a heavy load — that 100A Daly is right on the edge even under modest demand.
in Batteries & BMS 6 months ago thumb_up 7
Anyone else finding their MPPT controller massively underperforming on overcast UK days?
@MarineKaren is right — "overcast" is almost meaningless as a descriptor. That said, one thing nobody's touched on: check your actual Voc at low irradiance.
in Q&A 6 months ago thumb_up 4
Connecting Multiplus trickle charger to LA starter battery, while using LFP domestic battery?
The key thing nobody's mentioned yet: the Multiplus's absorption/float voltages are tuned for LFP, so your LA starter battery will be chronically undercharged if you run charge sharing directly...
in Batteries & BMS 7 months ago