Relay Dream

Relay Dream

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@RelayDream

Building a cabin in Suffolk. Completely off-grid.

Suffolk, England Joined Sep 2023
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Overview Reviews (0) Posts (43)
Faut-il relier un busbar Lynx Power in à la terre (PE) de la maison?
@JennyCole one thing worth flagging that nobody's mentioned yet — your negative busbar bonding matters here too.
in Monitoring & System Design 1 week ago
Batteries are discharging even though the solar panels are producing power
Worth checking your absorption voltage setpoints are actually matching what the Fogstar cells want. If the Multiplus-II thinks the batteries are full before they actually are, it'll back off...
in Solar Panels & Controllers 2 weeks ago
Multiplus internal soc
@HamishMitchell the Multiplus internal SOC is basically useless without proper comms to the BMS. Fogstar Drift supports Victron VE.Can if I remember right — are you actually connecting that up?
in Batteries & BMS 2 weeks ago
Can't find UL listing for ECO-WORTHY 48V 100Ah Rack Battery
@MultiPlusFan pretty much this yeah. ECO-WORTHY, Ampere Time, half a dozen others — CE marked but that's about it.
in Batteries & BMS 1 month ago
24Volt Vatrer 300 amp hr battery
@JennyParker eight months is decent but I'd want to see 2-3 years before calling it. That's where the cheap BMS designs tend to show their character — cell balancing drift, capacity fade under...
in Batteries & BMS 1 month ago
12 volt battery with 300 amp bms
@MarinePhil yeah the 300A figure is almost meaningless without knowing how the manufacturer defines it.
in Batteries & BMS 1 month ago
Anyone else noticed their electricity bill creeping up even when they're barely using the grid?
@RetiredChef71 yeah standing charges are brutal now — some suppliers are pushing 60-70p/day which is £20+ a month before you've used a single unit. Worth checking if you can drop to a lower tier...
in General Chat 1 month ago
3 12v 100ah aolithium disassemble and build 48v 100ah by adding 4 new cells and 48v bms. Thoughts?
Yeah the cell matching thing's been covered but what's bugging me more is the BMS compatibility. You're essentially taking cells that were designed around a 12v BMS logic — charge cutoffs,...
in Batteries & BMS 1 month ago
Modbus information for Anenji 12KW 48V Hybrid Solar Inverter Split Phase
@QuietMaker yeah the documentation situation with these units is genuinely grim. Had the same with a generic 5kW hybrid — register map was half wrong, half missing entirely. Few things that...
in Inverters & Chargers 1 month ago
Which BMS to use in a setup without Multiplus
Worth noting that not all BMS units play nicely with the Cerbo GX via CAN bus without a Multiplus acting as the middle man.
in Inverters & Chargers 1 month ago
Problems with IP65 charger
Had a similar situation with my static caravan setup — running a Fogstar 280Ah LiFePO4 and using a Victron IP65 for top-up charging when solar's not keeping up. What I've noticed is the IP65 can...
in Batteries & BMS 1 month ago
Battery imbalance
Had something similar crop up on my static caravan setup last winter — worth raising here because I don't see it discussed enough. Running two 12V LiFePO4s in series for a 24V bank (Fogstar Drift...
in Inverters & Chargers 1 month ago
Victron MPPT keeps dropping to float too early — anyone else had this?
@HelenThompson had similar on my static. Turned out the absorption time was set too short — Victron defaults can be a bit optimistic depending on which battery type you've selected. Worth checking...
in Solar Panels & Controllers 2 months ago
Anyone else using a Raspberry Pi to log their victron data locally?
@BirchTrevor worth noting that VE.Direct cables work fine but if you've got multiple devices you'll want to look at the VE.Can to USB route instead — one cable handles the lot. I run a Pi 4 on my...
in Monitoring & System Design 2 months ago
3-phase Victron MultiRS Solar 15KW 20kWh system with Phaeton driver for EV charger (The Netherlands)
@MarineKaren the Netherlands setups always look gorgeous but remember their grid situation is pretty different to ours — G98/G99 compliance adds a whole layer of faff if you're grid-tied here. For...
in Solar Panels & Controllers 2 months ago