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So I've been down this exact rabbit hole recently with my garden office setup, and thought it worth sharing for anyone else taking the plunge into Victron's newer LiFePO4 ecosystem. I picked up a...
Watt Nick in Batteries & BMS 4 months ago
Great thread idea @MoorCamper! These Victron setups can definitely throw some curveballs. One thing worth checking that catches people out - make sure your DVCC settings are properly configured in...
Noticed the same thing creeping in over the past couple of billing periods. Worth breaking down what's actually happening here because there are a few separate issues at play. The standing charge...
Bazza60 in General Chat 4 months ago
Had exactly this with my 100/20 on the shepherd's hut last summer. Turned out the default absorption time was set far too short relative to my battery bank size — I was running 200Ah of Fogstar...
So I'm mid-way through my van build and I've hit a bit of a wall with the solar sizing. Currently running a single 200W panel into a Victron SmartSolar 75/15 but I'm upgrading to a 400W panel...
Ray Powell in Q&A 4 months ago
@OakSoul one thing worth double-checking with the Cyrix-CT 120 in that arrangement — it's a current-sensing relay, not a proper DC-DC isolator.
Really interesting thread, been following this as I've got a similar situation brewing with my own setup. One thing nobody's mentioned yet — what's your Peukert exponent set to in the SmartShunt?
Mike in Batteries & BMS 4 months ago
@RetiredNurse and @RelayDream have covered the cycling behaviour well, so I'll add the numbers. A 60L chest freezer in a cool ambient (say 15°C garage) will likely average 15–20Wh/hour — call it...
Devon Dweller in Q&A 4 months ago
@BorderOffGrid classic one this. Check your remote on/off wire if you've got one connected — caught me out badly on my motorhome build.
Had this exact issue with my 100/30 last summer. Turns out the default absorption voltage was set slightly low for my Fogstar Drift LiFePO4 cells — the BMS was reporting full before the cells had...
Been running a similar setup on my narrowboat for a couple of years now, so this topic is close to home (literally). I've got a Victron Phoenix 12/1200 handling most of my onboard AC loads, fed by...
Been troubleshooting something on my garden office setup that I suspect others here might have encountered, so thought I'd post and see if anyone's had similar. My EasySolar II 24/3000/70 GX threw...
Interesting timing on this thread — I've been down a similar rabbit hole recently with my cabin setup. Been trialling a sodium-ion battery (not the Biwatt, but a similar chemistry unit from a...
@ThistleTel running VenusOS on a Pi is basically how I accidentally became a data nerd in my static caravan — one minute you're checking SOC, next minute you've got Grafana dashboards at 2am...
@BoatPaddy had almost this exact thing with my garden office last spring — MPPT looked happy, batteries barely moving. Turned out my cable run from the panels was just long enough to introduce...
@OakSeeker I actually did a rough comparison on my boat last summer — ran a cheap PWM unit alongside a Victron SmartSolar 75/15 on identical panels for about a fortnight.
Nicola Taylor in On a Budget 4 months ago
@Cleggy worth noting that the 200mm rule @LochLover mentioned gets really murky when your roof pitch is shallow — which most garden offices and shepherd's huts are.
OffGrid Tel in Garden Offices 4 months ago
Running a small chest freezer overnight is something I've been trying to figure out for my setup before committing to buying additional battery capacity. Currently running a 200Ah LiFePO4 (Fogstar...
QIH_Electric in Q&A 4 months ago
Been mulling this one over as it's relevant to my own tiny house setup. I've got a Victron SmartSolar MPPT 75/15 feeding into a secondary Fogstar Drift lithium battery, with a Cyrix-CT 120A...
Got a Fogstar Drift 200Ah sitting in my cabin and wondering if it'll cope with running a small chest freezer overnight without completely tanking the battery. The freezer is a Subcold Pro 35 —...
Fogstar_Fan in Q&A 4 months ago