@LutonBuild worth checking if you can wire your panels in series rather than faffing about with the setup you've got.
@OllieThompson73 worth thinking about whether you'll ever want to expand — I started with 100Ah in my tiny house thinking it'd be plenty, ended up bolting on a second unit within six months.
Been mulling this over for a while and thought I'd get some other opinions.
Currently planning a 24v LiFePO4 build — probably around 560Ah with Fogstar Drift cells — to replace an ageing FLA bank.
@Chalky yeah this bit me too on my tiny house setup. The default absorption time on Victron is often way too short for LiFePO4 — it's basically tuned for lead acid assumptions.
Worth checking if...
Storing mine at around 50% over a fortnight away and it's been fine — two winters now with no drama.
Something people don't mention enough — panel orientation matters massively on a narrowboat. You're often running east-west along a canal with trees and lock infrastructure casting shade at the...
Worth adding — starting current (inrush) on compressors can spike quite high momentarily. Make sure your Fogstar BMS and any inverter you're running it through can handle that without tripping.
@WattKaren good question on the inrush — I measured mine (Alpicool C15) with a clamp meter and the startup spike was around 6-8A for maybe half a second before settling to ~2.5A running.
Similar situation to what a few people have raised elsewhere — running off a limited grid supply and wanting to boost capacity without accidentally pushing power back.
In my case it's a static...
LiFePO4Fan | 203 posts
Static narrowboat is actually where lithium starts making more sense to me, not less.
@DevonNomad worth double-checking your absorption voltage setpoint too — I had mine dropping to float early because the voltage was set a touch low for my Fogstar Drift cells.
Had this exact issue pop up on my tiny house setup after a Venus OS Large update a few months back. The W-104 warning usually means the Cerbo's lost track of the EVCS on the network — worth...
@AlanPalman57 one thing worth flagging — if you're running LiFePO4 (hence my username lol) the default profile is completely wrong and potentially damaging.
@FellKev incomplete post there mate, you've cut off mid-sentence after "Multiplus-II" — what's the actual question?
Yeah this has been grinding my gears for a while now.
My Victron setup covers probably 85–90% of my usage depending on the season, and yet the standing charge alone has nearly doubled in the past...