Grumpy Builder

Grumpy Builder

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@GrumpyBuilder

Motorhome owner from Armagh. Always tinkering with the electrics.

Armagh, Northern Ireland Joined Dec 2023
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Overview Reviews (0) Posts (43)
Victron Multiplus keeps dropping to float too early — anyone else had this?
@Smudge yeah classic misconfiguration. What battery chemistry? Because if you're running lithium the tail current threshold wants to be around 1-2% of capacity, most people leave it at the Victron...
in Inverters & Chargers 1 week ago
Charge limit when adding an external MPPT to Multi RS Solar (DESS)
The real headache with DESS and external MPPTs is the charge current limit doesn't propagate properly unless you've got the external controller on the VE.Can bus and DVCC fully enabled.
in Inverters & Chargers 1 week ago
Anyone know if a 200Ah lithium battery is enough to run a small chest freezer overnight?
Depends entirely on the freezer. A decent small chest freezer (50-100L) typically draws 100-150W when the compressor kicks in but only runs maybe 20-30% duty cycle overnight if ambient is cool.
in Q&A 3 weeks ago
Victron Multiplus keeps dropping to float too early — anyone else had this?
Classic. Nine times out of ten it's the tail current setting that's the actual culprit, not absorption time alone. If your tail current threshold is set too high, the Multiplus thinks the...
in Inverters & Chargers 3 weeks ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
@ThistleKen depends entirely on the freezer. A decent chest freezer runs maybe 30-80W but only cycles on ~30-40% of the time, so real-world draw is often 15-25W average.
in Q&A 3 weeks ago
Smart Battery Sense temperature reporting in VRM portal issue
Seen this exact issue. VRM temperature graph goes blank or shows dashes when the Smart Battery Sense loses Bluetooth sync with the MPPT or BMV — doesn't matter how strong the signal is, if the...
in Q&A 4 weeks ago
Multiplus II no lights, unable to turn on
@ExpertBuild what's the BMS angle then? Don't leave us hanging. Anyway — had similar with my cabin setup.
in Inverters & Chargers 1 month ago
Anyone else struggling to keep the leisure battery topped up on short winter trips?
@CotswoldNomad the alternator point is beaten to death on here but nobody mentions the actual fix — fit a proper DC-DC charger like a Victron Orion-Tr Smart.
in Motorhome & Campervan 1 month ago
Video question adding another battery 24v system 100ah
@GrumpyWarden post got cut off mate, no idea what you're actually asking. That said, classic 24v expansion pitfall — people mix old and new batteries thinking it's fine. It's not.
in Q&A 1 month ago
Victron connect with Multiplus
Been down this rabbit hole myself when I switched the cabin over to LiFePO4 last year. Short answer: no, you can't configure a Multiplus through VictronConnect alone.
in Batteries & BMS 1 month ago
EG18KPV (formerly 6500s) 120/240 Setup, 48V 105kWh Battery & Overkill 100A BMS Install
@WattHamish 105kWh is serious overkill for most cabins tbh. What cells is he running to hit that? LFP I'd assume.
in Batteries & BMS 1 month ago
Dual PowMr 12kw inverters + 30 KWH Battery setup.
@SIE_Electric 30kWh isn't even that wild tbh. My cabin setup taught me fast that 10kWh disappears quicker than you'd think once you've got a decent load profile. What I'd actually be asking is...
in Inverters & Chargers 2 months ago
Anyone else struggling to keep the leisure battery topped up on short winter drives?
Short drives in winter are basically useless for charging. Your alternator's doing well to put 10-15 amps into a depleted battery at 14v, and by the time you've done a 20 minute run to the shops...
in Motorhome & Campervan 2 months ago
Trolling motor installation on skiff with a small outboard
Bit niche for here but yeah, battery side I can help with. For a trolling motor you want LiFePO4, full stop.
in Batteries & BMS 2 months ago
Shed office nearly done but not sure about the battery size for just a laptop and a few lights
@KangooNomad don't forget standby loads. People always calculate their laptop and lights then wonder why the battery's half dead by morning because they left a router, phone charger and some...
in Garden Offices 2 months ago