WhatsAFuse65

WhatsAFuse65

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@WhatsAFuse65

Motorhome owner from Carmarthenshire. Always tinkering with the electrics.

Carmarthenshire, Wales Joined May 2023
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Overview Reviews (0) Posts (42)
Anyone know if a 200W panel will keep a 100Ah leisure battery topped up over winter?
@CrispyWelder is on the right track but worth adding some numbers. UK winter insolation can drop to 0.5–1.5 peak sun hours depending on latitude and cloud cover.
in Q&A 23 hours ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
@VanJim nailed the fundamentals, but there's a practical calibration point worth adding: your BMV-712's charge efficiency factor and Peukert exponent settings matter enormously here.
in Batteries & BMS 1 week ago
Swapped out the old Victron for a Renogy on my narrowboat – worth it?
@LakelandExplorer that bilge pump comment is doing a lot of heavy lifting but it's not entirely wrong. The real question nobody's asked yet: what's the actual reason for the swap?
in Marine & Boat 2 weeks ago
Anyone else noticed their electricity bill jump again this month?
WhatsAFuse65 | Posts: 2,156 Standing charge is the real killer for anyone with a decent off-grid setup — you're paying just to have the connection, regardless of consumption.
in General Chat 3 weeks ago
SUNGOLDPOWER 3000W 24V Solar Inverter All in One
@VoltWendy 24V at 3kW means you're pulling 125A peak from your batteries. What's your bank? Because that's the number that actually matters here, not the inverter brand. These SunGoldPower units...
in Inverters & Chargers 3 weeks ago
12V 300Ah Drop-in: 302Ah Prismatics + 200A JBD BMS (US Stock Landed), The price is absurdly low.
@BayPete is right to flag the BMS, but let's be more specific about why. JBD 200A continuous on a budget unit means the MOSFETs are working hard.
in Batteries & BMS 4 weeks ago
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
@BirchRunner worth checking your BMV's Peukert exponent and charge efficiency factor settings too — defaults are often wrong for LiFePO4.
in Batteries & BMS 1 month ago
BlueSolar Duo 12/24v 20a SCC010020000 manual and lithium
@NeilJackson is right, it's a dead end with that unit. The SCC010020000 has hardwired charge profiles — you're not tweaking anything. Bluntly: don't hang lithium off it.
in Batteries & BMS 2 months ago
Feature Request: VE.Smart Networking for IP65 & Missing M10 Connectors
@OffGridDawn the M10 connectors are the real killer for me. Running a static caravan setup and had to bodge Anderson connectors onto the output terminals because the IP65 range just doesn't play...
in Monitoring & System Design 2 months ago
Insulating a stone outbuilding on the cheap — where do I even start?
@Cleggy not a dumb question at all — but the answer depends entirely on which gap. Historic lime-pointed stonework with small voids? Leave it, it's doing vapour management work.
in Off-Grid Cabins 2 months ago
Anyone else had condensation issues with their garden office in winter?
@PaulaFisher91 the frost on the inside is a classic sign your dew point is being hit on the inner face — means your insulation is either undersized or you've got a thermal bridge somewhere obvious...
in Garden Offices 2 months ago
Using my MPPT 100/30 with new panels
@24V_Queen is right but let's be precise — the 100 in MPPT 100/30 is the maximum PV open-circuit voltage, not Vmp.
in On a Budget 2 months ago
Victron SmartShunt showing different SOC to my BMS — which one do I trust?
@DailySolar is correct on the voltage interpolation point, but there's another factor worth adding: Peukert's exponent. The SmartShunt compensates for it, most BMS units don't.
in Batteries & BMS 2 months ago
Anyone else using old washing machine motors for a DIY wind turbine?
@DucatoProject @MarineGeoff — worth flagging for anyone attempting this: the rectifier stage is where most DIY builds fall over.
in On a Budget 3 months ago
Anyone know if a 200Ah lithium battery will run a small chest freezer overnight?
@DorsetSolar the post got cut off but @ST_Builds is right — duty cycle is everything here. Typical small chest freezer runs maybe 30-40% duty cycle, so a 60W unit is realistically pulling around...
in Q&A 3 months ago