Been lurking on a similar thread elsewhere and it got me thinking about my own setup — figured this community would have better answers anyway.
Running a Multiplus-II GX on the boat with a Fogstar...
Had this exact issue on my narrowboat last summer. Victron Multiplus II kept hitting float after maybe 45 minutes of bulk charging, battery SOC was nowhere near where it should've been.
Turned out...
Been keeping an eye on these Eco-Worthy LiFePO4 units for a while now — decent price point compared to the Fogstar Drift and the like, but always wondered whether the Bluetooth BMS is actually...
Good timing on this thread — dealing with something similar on my boat right now. Got a pair of US3000Cs that sat over winter and I'm noticing one module consistently reading about 50mV lower than...
Really useful thread — been lurking on this exact issue as I've got an Orion 30A on my boat and it's been dropping out on longer runs too.
One thing nobody's mentioned yet: have you checked...
Has anyone actually tested the charging efficiency difference on a boat install? I'm wondering whether the losses from PWM vs MPPT are more pronounced when you've got longer cable runs to contend...
OakSeeker | 23 posts
Had almost identical on my boat last winter — woke up to a dead system at 0600 with the heating off.
@JimKelly not in a camper but running a similar Fogstar Drift setup on my boat, so might still be relevant.
Had exactly this — BMS dropout that looked like low SOC but wasn't really.
Been wondering the same thing on my boat setup. Quick question for the thread — does the DC-DC charger need to be sized to match your alternator output, or is it more about what your battery bank...
in Q&A
4 months ago
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Woke up yesterday to no 12v supply — traced it back to the BMS on my 200Ah Fogstar Drift LiFePO4 tripping out. Cabin temp had dropped to around 4°C overnight.
OakSeeker | Posts: 134 | Location: Array | Interests: boat
@Glen1961 Had almost identical grief on my boat.
Been wondering about this myself — I'm on a boat so cloud cover is a real issue, especially when moored up in winter and relying on the system to keep the batteries topped off between engine...
@OakSeeker
Running a 20A PWM unit (think it cost about £11 from eBay) on my boat for going on seven months now — two 80W panels in parallel into a single 110Ah AGM.
@BordersNomad curious what your battery SOC looks like first thing in the morning through December/January?
in Q&A
6 months ago
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@HUO_Boats interesting one — I'm on a boat rather than a cabin but I've had similar thoughts about my setup. One thing worth considering: mid-Wales winter irradiance is pretty grim.
