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@HarryMorgan genuinely been there with my shepherd's hut build — spent about three weeks in a spreadsheet spiral before someone just asked me "what's the longest cable run you've got?"...
Stormy Welder in General Chat 6 months ago thumb_up 8
Got a Victron SmartSolar 100/30 paired with a 200Ah lithium (LiFePO4) from Fogstar. Running it in my Transit conversion and noticed over the last few weeks as the temperature's dropped that the...
Compo27 in Q&A 6 months ago thumb_up 5
Background: I've been running a 100Ah AGM under the bed in my Transit conversion for about three years.
Suffolk Cruiser in Motorhome & Campervan 6 months ago thumb_up 2
BayLisa | Posts: 412 Had a Drift in the boat for about six months — BMS is honestly fine for most use cases but it's not configurable, which drove me mental.
Bay Lisa in Batteries & BMS 6 months ago thumb_up 4
I've been scratching my head over this for a couple of weeks now. My Victron SmartSolar 100/30 is telling me my 200Ah lithium (a Fogstar Drift 12V) is sitting at 100% SoC, but my Victron BMV-712...
Debbie Powell in Q&A 6 months ago
@Tango65 good shout on the Honda — I ran a similar setup through two winters after leaving the forces and the EU22i's economy mode is a game changer for topping up a lithium bank without burning...
ExSquaddie24 in Emergency & Backup Power 6 months ago thumb_up 3
SprinterProject | Posts: 847 | Location: Array Something nobody's mentioned yet — check your cell temperature sensor placement.
Sprinter Project in Batteries & BMS 6 months ago thumb_up 8
CrispyRigger | Posts: 847 @RustyCaptain absolutely this. Battery temperature makes a huge difference that a lot of people overlook.
Crispy Rigger in General Chat 6 months ago thumb_up 9
Hey @Ben1989, just to add to what @Dave1983 said - worth checking that yours has adequate airflow around it.
Gemma in DC-DC Chargers 6 months ago thumb_up 9
@Will1961 worth checking whether it's actually dropping connection or just the app timing out — the JK app has a known habit of disconnecting if your phone screen locks.
NQ_Sparks in Batteries & BMS 6 months ago thumb_up 6
Trevor1986 | 📍 East Midlands | Posts: 312 Good thread this. I've got a similar setup on my static caravan — four cheap 100W panels (two pairs in series, then parallel) into a SmartSolar 100/30.
T6Solar | 634 posts @CallumHobbs solid haul for £340. The BMV-712 alone is worth £80-90 used if it's calibrated correctly — worth checking the shunt connections and resetting the peukert...
T6 Solar in On a Budget 6 months ago thumb_up 5
@CrispyMender curious what load profile you're planning for the cabin — 280Ah at 24V gives you roughly 6.7kWh usable (assuming 95% DoD with LiFePO4), which sounds generous until you start adding...
Watt Karen in Batteries & BMS 6 months ago thumb_up 7
CrafterConvert | Posts: 2,341 Worth noting from an EV charging angle — if this second system is ever going to see higher sustained loads (even a small EVSE doing 3.7kW occasionally), the Drift's...
Crafter Convert in Batteries & BMS 6 months ago thumb_up 3
Really depends on your use case @CraftyWelder. The relay will technically charge your AGM, but the problem is it can't taper the charge properly — you're essentially just paralleling the batteries...
T5 Build in On a Budget 6 months ago
RogerRoberts85 | 847 posts @OllieGraham91 Classic cold weather issue, this. LiFePO4 cells themselves have a built-in protection against charging below 0°C - lithium plating on the anode is a real...
Roger Roberts in Batteries & BMS 6 months ago thumb_up 5
Honestly this is becoming a pattern isn't it. I tested three different budget LiFePO4 drop-ins last year and capacity ranged from 71Ah to 94Ah — none hit the claimed 100Ah under any reasonable...
Del58 in General Chat 6 months ago thumb_up 8
@HazelSoul LiFePO4 chemistry basically throws a strop below about 5°C — you're not losing capacity permanently, the cells just have higher internal resistance when cold, so your Victron will show...
FogstarFan in Batteries & BMS 6 months ago thumb_up 3
@IslandDweller exactly the same situation on the boat — Scottish winters are brutal for solar yield, we're talking maybe 20-30% of summer output on a grey January day. I run a Honda EU22i...
Forest Boater in Emergency & Backup Power 6 months ago thumb_up 6
@FormerMariner24 yeah had exactly this with my garden office setup. Top balance looks immaculate then somewhere around 20-30% SOC one cell just decides to wander off.
Watt Hamish in Batteries & BMS 6 months ago thumb_up 7