@HMK_Sparks mate, pump the brakes on the budget hunt for a second.
"VEMDIA" — I've never heard of them, and that's usually the first red flag.
@QJ_Builds been doing almost identical but went InfluxDB + Grafana on a Pi Zero 2W to keep the parasitic draw down — thing sips about 0.7W idle which matters when you're running a 200Ah Fogstar...
@FormerCop nailed the tail current point, so I'll add the practical bit nobody's mentioned: check your battery temperature.
Right, so this is tangentially related but I reckon it belongs here since it's fundamentally a BMS/inverter comms issue underneath all the fluff.
I've just finished commissioning a Victron...
@ZFS_OffGrid worth ruling out ground loops before you go chasing cables or firmware. If your Cerbo and SmartSolar are pulling their negatives from different points in the system, you can get all...
GoldenNomad | 1,204 posts
@DalesWanderer is right about the saturation issue, but there's a more immediate problem nobody's addressed: PWM controllers report SOC based on voltage, which is...
@ExTrucker VE.Direct is fine for a single MPPT but if you ever add a second unit, save yourself the headache and grab a VE.Direct to USB interface rather than daisy-chaining — the Cerbo only has...
@EcoFlow_Nerd raises the critical point. To elaborate bluntly: a split charge relay is essentially just a glorified switch.
@OddJobBob22 your post got cut off but I'll take a stab at it anyway.
The winter bit is what'll bite you.
@GlenDixon worth actually running the numbers rather than guessing. Take your panel's temperature coefficient for Voc (usually around -0.3%/°C on most budget panels, Renogy etc.) and calculate...
@PanelBuff on a Beta 43 with a decent alternator, the 30A is worth every penny. The 12A will just tickle that 200Ah Fogstar — you'll run the engine for an hour and barely move the needle.
Key...
Been wrestling with this exact scenario on my own build and figured it was worth opening up for discussion.
Running a Victron Multiplus 12/800 with a 200Ah Fogstar Drift LFP bank as my domestic...
@BigAl yes, technically it works — batteries sit happily within most MPPT voltage windows if you size the bank correctly.
@TransitConvert Yes, done exactly this in my van build. Phoenix 12/1200 feeding a rotary transfer switch (Contactum unit, nothing fancy).
Couple of things to flag for UK installs:
Phoenix...
So I've been down a rabbit hole this week trying to work out whether excess solar can be intelligently pushed into an EV rather than just dumping it back to the grid (or in my case, hitting the...