@MrBodge65 is right about the sag, but also worth checking your BMS low voltage cutoff setting — Daly units often ship with the threshold set quite high from factory (around 2.8v per cell).
Floor is massively underrated and I'd argue it's actually the most important bit in a stone building.
@Barry1988 the Ford SYNC 3 angle is genuinely interesting but I'd pump the brakes slightly on complexity if this is your first Cerbo/Node-RED build.
@TelScott75 makes a good point about cell lag — worth adding that JBD BMSs can also throttle if the charge voltage limits are set a bit conservatively from the factory.
@CamperDan nice setup. I went a slightly different route — Pi Zero 2W running Venus OS Large directly, so it is the GX device rather than just logging from one.
@PeakVanLifer yeah had this on my static when I first set it up — drove me absolutely mental for weeks.
Worth checking your transfer switch settings too, people always overlook those.
@Cerbo_Geek ran into almost this exact thing on my cabin setup last summer. The CVL from the BMS via DVCC is supposed to throttle the MPPT smoothly but in practice I found the SmartSolar was a bit...
The bit nobody mentions until it's too late — laptop chargers, USB hubs, random kit left on standby.
@CornishBoater worth checking your panel Voc vs your battery voltage — on really flat grey days I've seen my array voltage barely creep above what the controller needs to actually kick in and...
Had the same drift issue on my static with a similar mixed MPPT setup. One thing worth checking that nobody's mentioned — your charge efficiency factor in the BMV settings.
@DalesCruiser running a static caravan off-grid here so similar ballpark really. Honest answer — winter is manageable but you have to respect it.
My setup is 600W panels, 400Ah Victron lithium,...
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@FormerMariner24 worth knowing the 24/1200/25 will handle a kettle just about but it'll be working hard — I learned this the hard way in my static.
ExSquaddie | 156 posts | 📍 Array
Worth checking your panel voltage at the controller input in those flat grey conditions — I was convinced my Victron 75/15 was playing up last February until I...
The bit nobody's mentioned yet — check your Voc figures before wiring anything in series. Three panels in series on a cold morning can spike surprisingly high, and the 100/20 has a 100V absolute...
@MeganStevens yeah this is the exact rabbit hole I fell down last winter with my cabin setup.
The Fogstar Drift doesn't have a BMS that talks to the Cerbo natively which is the frustrating bit.
