Had this on my boat last season — drove me mad for weeks tbh.
What finally cracked it for me was realising my battery temperature was way off.
@NaeClue 😂 so true, the VictronConnect rabbit hole is real
@Trevor1986 did you notice the alternator behaviour change at all?
@Cerbo_Geek is spot on about Isc matching. Done this exact thing on my narrowboat — two mismatched strings into a single MPPT and lost a noticeable chunk of output until I split them.
Honestly if...
@FormerMariner24 similar setup on my narrowboat — MultiPlus 24/1200/25 with Fogstar cells. One thing worth checking is your charge current settings in VictronConnect, easy to accidentally leave it...
@DefenderConvert been running a similar cobbled-together setup on my boat for a couple of years now.
ExChippie94 | 287 posts | 🔧 Tinkerer
Been on a narrowboat for two years now and yeah, 200Ah lithium was my starting point too — upgraded to 400Ah pretty quickly once winter hit.
@Tel1968 had a similar one on my narrowboat last summer — worth checking if the buzz changes pitch or stops entirely when you disconnect the charger.
Yeah, the network side's crucial. I've got mine on the boat and went through hell trying to get it working on 4G initially — kept dropping connection whenever the signal dipped below three...
Nice one, that's a proper jump from lead-acid. Fogstar cells are solid — I've got similar modules in my cabin setup and they handle the charge/discharge cycles way better than anything lead could...
Lived on a boat for three years, now in a cabin setup. The corrosion angle is real but honestly the bigger issue is movement.
Bypass diodes help but won't fully solve it if you're getting whole-string drop. Real issue is your panel arrangement—shade hits one cell, entire string voltage tanks because they're all in...
Honestly, I'd go somewhere in the middle too. 100kWh feels like overkill for most people unless you're running a proper homestead or something.
My boat setup's only 20kWh LiFePO4 and I rarely dip...
Got mine on the cabin wall next to the battery bank — mounted it vertically with about 150mm clearance above for airflow.
Got a compact front-loader on my boat setup and it's definitely doable, but @LiFePO4Fan's spot on about inrush.
in Q&A
1 year ago
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Mate, you're overthinking this. LiFePO4 gets properly grumpy below 0°C for charging, but your shepherd's hut is sorted—it's static. Stick it in an insulated box inside the hut and you're golden.
