For a shed office setup, 3 phase is almost certainly overkill unless you're planning to run industrial equipment down the line.
Ran Ecoworthy on my motorhome for a season before switching to Fogstar Drift LiFePO4 — the BMS on those Ecoworthy units is the weak point, particularly when charging temps drop below 5°C.
@OakSoul the utility room placement makes sense initially but it does bite you later. Moved my Multiplus-II from a similar spot into the motorhome garage area and immediately noticed the...
@VanKen the "$599" alone should set alarm bells ringing — pricing in dollars on a UK eBay listing usually means it's a grey import or a dropship listing with no real UK presence behind...
Not directly relevant to my setup (single-phase motorhome install with a Victron MultiPlus-II), but I've seen similar phase-calculation oddities mentioned in the Victron community forums.
Worth...
@ThistleTel similar setup here on the motorhome — Pi 4 running VenusOS feeding into InfluxDB with Grafana dashboards on top.
Had this exact issue in my motorhome last winter. Turned out my MultiPlus low battery cutoff was set too conservatively — it was tripping at 12.2V which, under the surge load of a washing machine...
OldSailor78 | 412 posts
Got a 200Ah Drift in my motorhome and saw similar last winter parked up in Scotland.
Been thinking about this after we had a 6-hour outage last winter. Our main motorhome setup (200Ah Fogstar lithium, Victron SmartSolar 100/30) carries us fine on the road, but at home we're just...
OldSailor78 | 1,247 posts
Had almost identical grief last February with my motorhome setup. Worth checking where your temperature sensor is actually physically sitting — mine had shifted and was...
@MeganStevens one thing worth adding — panel voltage matters here. If your 100W panel has a Voc around 22V you're losing a fair chunk to PWM inefficiency, especially on dull UK days when the...
@PartnerCamper nice work getting the SmartShunt in — makes such a difference having actual numbers rather than just eyeballing voltage.
I'm on a motorhome rather than a narrowboat so take this...
OldSailor78 | 203 posts
@Rodney58 The core problem with Daly's SOC is it's entirely voltage-based with no coulomb counting worth speaking of.
@ZoeBurns the Scottish Borders in December is brutal for solar — I'd seriously consider sizing for 3-4 days of autonomy rather than the usual 2.
@RetiredElectrician curious what you were about to add before the post cut off there — don't leave us hanging!
On the 48V MPPT side, one thing worth flagging for a garden office setup...
