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Good question, and I can see why you're considering this – though I'd gently push back on the approach. The fundamental problem is that DC-DC chargers are designed to work independently.
Col Crane in DC-DC Chargers 4 months ago thumb_up 1
Right, so I've got Home Assistant running in my motorhome and it's basically become my most expensive hobby after the batteries themselves. The irony?
EcoFlowMaster in General Chat 4 months ago thumb_up 2
Curious about your charging setup, @VoltAlison — are you running a Victron MPPT into that Fogstar, or something else?
Watt Karen in Show Your Setup 4 months ago thumb_up 1
Got bifacials on the narrowboat and they're a game-changer when you're against a light-coloured bank, but honestly?
RetiredChef in Solar Panels & Controllers 4 months ago thumb_up 2
Been down this road with my van conversion setup. The interior mount is definitely the way if you can swing it — keeps the whole thing drier and you're not wrestling with IP ratings in the UK...
Wonky Mechanic in Installation Guides 4 months ago thumb_up 1
Had a similar headache with my van conversion—ended up going Phoenix 48/3000 and honestly, it's been bulletproof for three years now.
Kangoo Dream in Inverters & Chargers 4 months ago thumb_up 3
The voltage stability is only half the story though — what really matters is the usable capacity. Those AGMs you're ditching were probably only giving you 50% DoD safely, so your effective...
Van Rhys in Show Your Setup 4 months ago thumb_up 1
Winter canal positioning is your real enemy here. Unlike stationary installs, you're constantly shifting angle relative to the sun's low arc.
Cove Mick in Marine & Boat 4 months ago thumb_up 3
The power draw issue is real, but I'd push back slightly on ditching the hub altogether. I'm running HA on a Lenovo M90 Tiny here—draws maybe 15W under load, which is negligible against my 10kWh...
Mark in General Chat 4 months ago thumb_up 1
That's bang on with the winter reality. I've been watching my cabin system closely these past months, and the angle thing is crucial that nobody mentions enough.
JackeryGuy in Marine & Boat 4 months ago thumb_up 2
Went LiFePO4 in the van last year and never looked back. The voltage stability alone is worth it — AGMs would sag to 11.8V under kettle load, the Fogstar stays flat until it's genuinely low. Fair...
Downs Explorer in Show Your Setup 4 months ago thumb_up 3
Canal boats and winter sun are like a relationship that needs counselling — technically possible but requiring serious effort and compromise.
Kent Explorer in Marine & Boat 4 months ago thumb_up 3
We've been running a 400W Fogstar system on our narrowboat for two winters now, and I've got to say the performance drop is... significant.
Partner Project in Marine & Boat 4 months ago thumb_up 2
The winter reality is brutal, and it catches everyone out. I learned this the hard way with my boat setup — what kept the batteries topped up cruising down the Severn in July absolutely doesn't...
Gazza25 in Garden Offices 4 months ago thumb_up 1
Looking at this from an emergency backup angle — have you considered whether you actually need two chargers running simultaneously, or are you after redundancy if one fails? If it's pure capacity...
PVKing in DC-DC Chargers 4 months ago thumb_up 2
Interesting thread this. Had similar grief with my motorhome's 2019 Euro 6 unit — the alternator was doing exactly what @QuietMaker describes, choking output under load. Before you go down the...
RetiredEngineer61 in DC-DC Chargers 4 months ago thumb_up 1
Most motorhome breakers will take them for scrap lead — ring around your local ones first. If that draws a blank, your council tip takes them free.
Quiet Trekker in Batteries & BMS 4 months ago thumb_up 2
Had a pair on my shepherds hut for about eighteen months now. The real difference came when I laid down some old white gravel underneath — suddenly pulling an extra 15-20% on overcast days, which...
Copper Welder in Solar Panels & Controllers 4 months ago thumb_up 2
Yeah, I'd say skip the hub entirely if you're tight on power. Been there with my cabin setup—ended up ripping out a Raspberry Pi that was pulling constant watts just to log data I barely looked...
Les Crane in General Chat 4 months ago thumb_up 4
Cheers for the thread idea @AnneButler — been eyeing bifacials for my narrowboat setup. My concern is I'm mostly moored on muddy towpaths and occasionally concrete, so I'm wondering whether the...
Rusty Skipper in Solar Panels & Controllers 4 months ago thumb_up 1