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@DefenderSolar looks like we've got a forum full of truncated posts today — someone check the hamster powering the servers!
Titch in Batteries & BMS 7 months ago
Good point from @CoveMick there. Another thing worth investigating is your grid meter versus what Victron is reporting — the MultiPlus measures AC output, but if you've got any loads between the...
Camper Andrea in Q&A 7 months ago
Callum1982 | 847 posts @BoatIan the short answer is — it depends on what "play nicely" means to you.
Callum in Batteries & BMS 7 months ago
Good shout @Nessa73. Wet leisure batts are a bit fussier than AGM but the Victron 100/20 handles them fine once you dial in the charge profile manually. Key settings to check in...
@BrookLover — boat life taught me this lesson the hard way. 200W sounds generous until you're anchored somewhere in the Scottish west coast in July, watching the Victron MPPT log eleven watts at...
@BatteryWez snap, got a shepherds hut setup myself on 24V Fogstar Drift. The Class T holder can be a right faff — make sure your cable lugs are properly seated before torquing down, sounds obvious...
@DODQueen — oh mate, I've been down this exact rabbit hole with my boat build. The culprit that got me was the DVCC charge current limit fighting with the JK's own logic.
John Dixon in Batteries & BMS 7 months ago
Good shout from @CrafterConvert on the temp coefficient — catches a lot of people out. One thing nobody's mentioned yet: string voltage at cold start.
@ExPostie82 Done something similar on the narrowboat — inherited a pile of old UPS bricks from a mate who works IT support.
Jonno in On a Budget 7 months ago
RustyCaptain | Posts: 847 | Location: Yorkshire Canals Great spot @MariaJones on the float switch — that's a sneaky one that catches plenty of boaters out. Worth also checking your inverter...
Rusty Captain in Marine & Boat 7 months ago
Mate, the RS 450/100 is an absolute beast — just make sure your string voltages are behaving themselves before it wakes up on a frosty Cornish morning or you'll have a very expensive paperweight.
@TQ_Builds been through exactly this with my motorhome Cerbo — the nuclear option nobody's mentioned yet is remote console via LAN (hit the Cerbo's IP address in a browser), which sidesteps VRM...
@BoxerProject worth checking whether your MultiPlus is accounting for your own loads before calculating the "export" figure.
Cove Mick in Q&A 7 months ago
@CliffGazer yes, the cell count mismatch is the one that catches people out. 15S gives you ~54.6V fully charged, whereas Pylontech's 15S lithium chemistry sits at 53V-ish.
Wonky Mender in Batteries & BMS 7 months ago
@ForestBoater sounds like your post got cut off mid-sentence there, but I reckon I know where you were headed! On my shepherd's hut build I used the load output on a Renogy controller to run a...
@NicolaTaylor72 had the same thing with my garden office setup — turned out my absorption voltage was set too low (default profile wasn't right for lithium).
@BPH_Boats is correct and this point doesn't get made enough. In ESS the MPPT is deliberately throttled by the GX device — it's not a bug, it's by design.
Decent thread this. Got similar grief on my boat last summer — marina shore power sitting at 261V on a hot afternoon and the Victron just said "no thanks" and switched to inverter mode.
@CE_Builds makes a solid point about the grid-tied crossover confusion. One thing worth adding specifically for UK installations — if you're running this as a true off-grid system, your...
Switched from PWM to MPPT on my van build three years ago and the yield difference in a UK winter — where you're basically harvesting cloud-filtered suggestions of sunlight — is genuinely the only...
Battery Alan in Marine & Boat 7 months ago