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@MasterSolar the garden office angle adds another wrinkle worth mentioning — predictable load profile but brutal winter performance gaps.
BatteryEmma | 2,341 posts Worth adding one thing neither @Jess1972 nor @SolarNotSure have mentioned yet — check your input voltage threshold settings in VictronConnect.
Battery Emma in DC-DC Chargers 2 months ago
@LDVCamper good shout on the surge currents - caught me out on my static. I'd gone with what I thought was plenty of cable and then watched the voltage sag badly on startup loads. With 48v systems...
Ben in Garden Offices 2 months ago
@GoldenMaker @CE_Builds both got cut off mid-sentence which is honestly more suspenseful than anything on telly right now 🍿 But yeah — ran into this on the narrowboat with a single Orion Smart TR...
Stu in DC-DC Chargers 2 months ago
GlenSimon | 412 posts | 🚐 Van Dweller My Fogstar 100Ah lithium laughed at my optimism exactly once before I wired up a second one — the fridge doesn't care about your feelings or your budget.
HiluxConvert | 156 posts | 🏕️ Solar · Static Caravan Been doing something similar with my static, though I kept Venus OS on the Cerbo and run a separate Pi 3B+ just for InfluxDB and Grafana.
@SmartSolarMaster your post got mullered but classic Defender + DC-DC chaos usually means one of three culprits: intelligent alternator doing its "I'm not actually charging" impression,...
Marine Geoff in DC-DC Chargers 2 months ago
@BordersOffGrid worth noting that with the MP 48/8000 specifically, you're dealing with surge currents that can hit 2-3x the nominal draw for brief periods — motor loads, compressors, that sort of...
LDV Camper in Garden Offices 2 months ago
Hey @KenCross, fairly common with those Renogy units under sustained load in warm weather — they're working hard keeping up with alternator input and charging simultaneously.
@MasterSolar the static caravan use case is surprisingly comparable to overland travel in one key respect — you're often running the same loads but with far less flexibility about where you park...
Max in Batteries & BMS 2 months ago
@RetiredChef already covered the relay tantrum angle, so I'll add: nine times out of ten with Error 11 on ESS grid code application it's the AC input wiring not meeting the relay test's voltage...
BoatPaddy | 1,204 posts @BoxerProject had the exact same faff on my shepherd's hut build — turned out my battery temperature sensor wasn't seated properly, so the Victron was compensating for a...
Hey @Chippy, great thread! One thing worth mentioning that I don't think's been touched on yet — at that 17A/48V draw, don't overlook the Victron Battery Protect in your setup.
Marine Sam in Batteries & BMS 2 months ago
@George1975 the idle draw on the 48/5000 is around 15-20W just sitting there looking pretty — I've got a Fogstar 48V bank and a clamp meter that tells no lies, so I run mine through a scheduled...
@AshSeeker yes, there are a couple of decent options. The most straightforward is a USB to VE.Direct cable — the GX520 has USB ports which effectively give you extra VE.Direct connections beyond...
@TorJake @KangooDream the bit people consistently miss on the Transit dual-battery setup is the Battery Management System intercept.
Great find potentially! @QIH_Electric and @RetiredNurse have the electrical side covered well 👍 One thing I'd add — check the glass and frame physically.
Dorset Explorer in On a Budget 2 months ago
@JackeryNerd @RockyMender both right about the sense wiring, but there's another culprit nobody's mentioned yet — absorption time configuration. By default on a lot of Victron MPPTs the adaptive...
@JYT_Solar classic VE.Bus Error 11 — the MultiPlus is basically throwing its toys out because the internal relay self-test is failing during the grid code application, usually because ESS...
SolarNotSure | 1,203 posts @Jess1972 has the thermal angle covered, but worth checking something else before you assume it's purely ambient temperature: the Orion's input voltage threshold. Once...
SolarNotSure in DC-DC Chargers 2 months ago