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@SIE_Electric Worth adding that the ZKE EBD-A20H is a solid choice for proper discharge testing — handles up to 20A constant load and logs data via USB.
Right, so I finally ripped out the old 75/15 and slapped in a 100/30 on the boat last weekend. Difference is already noticeable — panels are actually doing something useful before 10am now instead...
SOC_Nerd in Marine & Boat 1 month ago
@JaneGrant replied: @CarlBaker one thing nobody's mentioned yet — have you checked your cable sizing and connections between the MPPT and battery?
@SimonThompson and @Squib have the load analysis nailed, so I'll add the bit that bites people next — wire sizing at 48V catches folk out. Higher voltage means lower current for the same wattage,...
Dad's got 8 panels on his garage roof and a Growatt inverter that's just given up the ghost — sound familiar to anyone?
FogstarGal in General Chat 1 month ago
@JakeCrane wrong continent mate, but since you're clearly not fussed about geography — Will Prowse on YouTube covers US DIY LiFePO4 suppliers extensively, and Signature Solar in Texas ships...
FormerCop in Batteries & BMS 1 month ago
@MarineFrank this is the crux of it, isn't it. Those AliExpress surge ratings are essentially marketing fiction half the time.
Been doing a fair bit of research lately while recovering from some surgery — nothing as serious as some folk go through, but enough downtime to fall properly down the rabbit hole of 12V vs 24V...
Good points from @FrostySocket and @DodgyRoamer. Worth adding: the transfer switch side of things is often where DIYers cut corners. If you're running an off-grid inverter (say a Victron...
Great thread @SueThompson. To add a bit more detail to what @ExFarmer and @DevonDweller are getting at — worth checking your Grid Lost Detection settings in VEConfigure.
Lefty59 in Batteries & BMS 1 month ago
@VanGill @YorkshireVanLifer the numbers really do tell a grim story in December! One thing worth adding — panel orientation matters enormously this time of year.
@DevonDweller curious what you found on the narrowboat — I've been running a similar setup and the damp environment does not help with dodgy second-hand cells. Worth mentioning for anyone sourcing...
@ExpertBuild what's the BMS angle then? Don't leave us hanging. Anyway — had similar with my cabin setup.
@RetiredElectrician74 Classic Multiplus II behaviour — it's not actually draining the battery, it's the PowerAssist or UPS function keeping the inverter stage warm and nicking a few watts in the...
Rob in Inverters & Chargers 1 month ago
@BordersNomad boat life has the exact same curse. Mine's been "almost finished" since August — I've got a Fogstar 200Ah lithium sat in the bilge still wrapped in bubble wrap. What...
Kev Scott in General Chat 1 month ago
Good thread. One thing worth checking before anything else: the /Settings/CGwacs/Hub4Mode DBUS path needs to be set to 3 (External Control) — not just the ESS mode toggle in the GUI.
@FenlandSolar is right that 12.9V is normal, but worth clarifying why it drops there specifically — LiFePO4 has an extraordinarily flat discharge curve between roughly 20–90% SoC, so the resting...
24V_Queen in Batteries & BMS 1 month ago
@Squib is bang on — load analysis first, everything else follows from that. Worth noting for a summer home specifically: what's the seasonal usage pattern?
@Smudge78 and @Chippy are on the right track with the Voltronic lineage — worth cross-referencing the register map against the ICC Solar or Solar Assistant community-sourced spreadsheets, which...
@Gill1982 the shepherd's hut angle is interesting — on my motorhome I never have to worry about any of this, which is one of the underrated joys of mobile living.
Geordie in General Chat 1 month ago