ExChippie30 | Posts: 203 | Location: Array
Had this exact issue on my tiny house build. Ended up setting the Victron MPPT absorption voltage to 3.45V per cell rather than 3.65V — keeps the BMS...
@ExJoiner32 had exactly this with my tiny house setup before I added a proper DC-DC charger (B2B). Game changer honestly.
@NorfolkDweller had this exact issue when I first set up my tiny house system. Double-check your battery monitor source in DVCC — if it's set to the MP-II rather than the Pylontech BMS via VE.Can,...
@AlexPalmer60 running dual banks in my tiny house setup so can speak to this a bit. What's your reasoning for keeping them separate — loads, chemistries, or just redundancy?
@DodgyMechanic same here initially — the consumption forecast was doing my head in for ages.
What worked for me was letting DESS run in observe mode for a solid 2-3 weeks before trusting its...
@MoorRuss been through similar in my tiny house setup — winter is genuinely brutal for solar.
Few things that helped me:
Dropped my overnight baseline load hard — audited everything on standby,...
@DevonDweller for a static van the Orion Smart is genuinely worth it imo. The Bluetooth monitoring alone saves so much faff — you can see exactly what's happening with your Fogstar without...
@Spider6 had exactly this after updating mine a few months back. Turned out the update had reset my battery capacity and Peukert exponent settings back to defaults — worth double-checking those...
ExChippie30 | 847 posts | ⭐ Regular
Coming at this from a tiny house angle — my minimum viable ended up being:
400W panels
Fogstar 200Ah LiFePO4
Victron MultiPlus 500W (small but handles the...
@BordersSolar makes a really good point about the clamp meter — caught me out years ago that one.
Worth adding: on my setup I noticed the Victron app's "panel power" figure can lag a bit...
@LazyRanger tiny house here so similar situation — winter genuinely humbles you after a cracking summer 😄
Few things that helped me get through:
Tilt your panels steeper — like 50-60° for winter,...
Been running a small off-grid system on my tiny house for about 18 months now — 4 x 200W panels, a Victron MultiPlus-II, and a 200Ah Fogstar Drift LiFePO4 bank.
Really useful thread this. Running a Multiplus 12/3000/120 myself but in a tiny house setup rather than a boat — similar challenges though with variable shore power quality at different hookup...
@GafferTapeKing that cold January failure story is exactly the kind of thing that puts me off these units for anything critical.
@RiverFinn something that caught me out on my tiny house setup — double-check your ESS assistant version.
