If money were no object — dream off-grid setup?

Right, mine would be absolutely mental. Full 48V Victron setup obviously — LiFePO4 battery bank the size of a garden shed, easily 100kWh+. None of this penny-pinching with usable capacity.

Solar array covering every south-facing surface plus a decent chunk of the barn roof. We're talking 15-20kW of panels because why not. Throw in a proper wind turbine as backup — one of the good German ones, not some cheap eBay disaster.

Dual inverters for redundancy, MPPT controllers on everything, battery management that's basically overkill. Honestly just have Victron monitoring everything with colour screens the size of tablets in every room.

Heating? Ground source heat pump running off the battery. Hot water from solar thermal AND an air source backup. Never think about energy bills again.

The fun bit — full automation. Everything linked to Home Assistant. Batteries charge during cheap rate hours (hypothetically), load-shift automatically, solar diverted to immersion heater when it's sunny. Just set it and forget it.

And because money's no object, redundancy everywhere. Second battery bank offsite. Backup gennie that runs biodiesel. Multiple inverters so a failure doesn't kill the whole system.

What about you lot? Anyone else fantasising about battery banks that actually give you headroom instead of constantly monitoring state of charge at 85%? Or going full mad scientist with some exotic setup?

That's the dream, isn't it? Though I'd probably go a different route — less is more for my cabin setup.

I'd want a properly sized system that actually matches usage rather than just throwing money at it. Maybe 15-20kWh LiFePO4 with a solid Victron hybrid inverter, decent solar array that doesn't need constant monitoring, and crucially — a reliable backup gen for when you inevitably get a week of grey skies in November.

The real luxury would be proper battery management and monitoring that just works without tinkering constantly. And good thermal management so the batteries aren't sweating in summer.

What's driving your 100kWh spec, @MidlandsNomad? Year-round off-grid or just trying to eliminate any possibility of running short?

Fair point @GemmaStewart, though I reckon there's a sweet spot between the two approaches. A 100kWh bank sounds mental until you're genuinely running a workshop or running multiple appliances simultaneously — then it just becomes practical rather than excessive.

My actual setup sits somewhere middle: 15kWh usable LiFePO4 with a modest 6kW solar array. Covers the motorhome comfortably, but I'd absolutely go bigger if budget allowed. The thing about Victron gear is you're not just buying batteries; you're buying the infrastructure to expand without bodging it later.

The real luxury wouldn't be the size though — it'd be redundancy. Dual MPPT chargers, backup inverters, proper monitoring. Peace of mind costs more than raw capacity. That's what I'd splash out on, honestly. Less about the headline numbers, more about reliability when you're actually off-grid for months.

Right, I reckon the sweet spot depends entirely on your actual usage pattern rather than just throwing money at it. I've run a narrowboat off 16kWh usable for three years now, and honestly the constraint forces better habits — you actually think about consumption.

That said, if money's genuinely no object, I'd go 48V Victron with maybe 60kWh usable LiFePO4 (not 100+) paired with a proper 12kW solar array and a small petrol genset for winter. Anything larger becomes maintenance theatre — you're faffing with cell balancers, monitoring software, thermal management.

The real luxury spend would be the inverter/charger quality and redundancy. A Multiplus II paired with a Fronius or SMA inverter gives you actual peace of mind, not just capacity.

@MidlandsNomad — what's your winter sun like where you're based? That's usually what dictates whether you're oversized or sensibly sized.

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 below 40% — could've gone smaller tbh. The real win is good solar coverage and maybe a modest genset for winter backup rather than just stacking batteries.

That said, if money's genuinely no object? Probably go full 48V Victron with maybe 60kWh and a decent sized array facing south-west. Redundancy in the inverter side too — nobody wants their entire system dependent on one charger. Chuck in a heat pump or two since you're not worrying about parasitic loads anymore.

The sweet spot @Boycie mentions is spot on — depends what you're actually doing. Living aboard? Less battery needed than a stationary cabin running heating and appliances all winter.

What would really change things with unlimited budget is the install quality and future-proofing rather than just bigger numbers.

The issue with the "unlimited budget" scenario is that you still hit practical constraints pretty fast. Even on a narrowboat, where space is genuinely limited, I'd struggle to justify more than 50-60kWh usable without it becoming a dead weight that eats into your payload and cruising range.

Where the money actually matters isn't bank size—it's redundancy and quality components. Multiple MPPT controllers, proper isolation monitoring, a bulletproof BMS, decent cabling throughout. A Victron Cerbo GX with all the bells on. A solid 10kW inverter that actually handles inductive loads without histrionics.

And frankly, once you've got good monitoring and sensible usage habits, you realise most people overestimate their winter requirements by about 40%. My setup runs fine on 15kWh usable during grey months because I actually understand where the power goes—not because I'm penny-pinching, but because it's more efficient than just throwing capacity at the problem.

If money were genuinely no object, I'd spec a proper dual-fuel backup system (LPG boiler, maybe a small

Mate, 100kWh is brilliant until you realise you've spent more on batteries than your actual house is worth. Then you're stood in your garden office at 2am worrying about cycle degradation like some sort of unhinged energy accountant.

That said, if money's genuinely no object, I'd go full Victron 48V into a

Fair points from @ExChippie94 and @RetiredElectrician, but I'd actually push back slightly on the "overkill" angle. If money genuinely weren't an object, the real question becomes what problem are you solving?

For me it's not about having massive reserves just sat there — it's about never compromising on the essentials. A proper 100kWh LiFePO4 bank means you could run a full work-from-home setup (multiple monitors, heating in winter, proper workshop tools) without constantly monitoring consumption or worrying about dodgy weather stretches.

The van conversion community tends to operate on tight constraints because we have to. But if constraints vanished? I'd want redundancy built in. Dual MPPT controllers, oversized solar array (say 15-20kW), enough battery capacity that you're genuinely cycling between 20-80% rather than thrashing it daily.

@RetiredElectrician's cost concern is valid though — at what point does the dream setup just become... showing off? Probably somewhere around 60-80kWh feels sensible even

The thing that gets me with unlimited budget scenarios is you'd actually start optimising for reliability rather than just raw capacity. I'd go Victron through and through — their redundancy options mean you're not sweating a single point of failure.

That said, @RetiredElectrician's got a point about diminishing returns. I've seen folk with massive battery banks running the same loads as someone with half the capacity — just costs them a fortune in charging losses and maintenance.

What I'd actually splurge on is the monitoring and control side. A proper SCADA setup, multiple inverter/charger units, battery management that actually learns your patterns. And decent cable spec throughout — copper prices being what they are, most people undersise out of cost.

My static caravan taught me that 15-20kWh of usable LiFePO4 covers almost everything if you're not daft about heating. Unlimited budget? I'd go 50kWh max and spend the rest on solar generation capacity instead. Winter's the killer anyway, not summer.

I'd be genuinely boring about it, which probably defeats the point of a "dream" scenario. The thing is, once you've got past about 15-20kWh of usable LiFePO4 and a properly sized array, the returns on additional spend collapse spectacularly.

What I'd actually splurge on is redundancy. Dual Victron Multis in parallel, two separate MPPT controllers feeding different battery strings, a backup generator that actually works (none of this cheap inverter-gen nonsense), and proper off-grid load management so you're not constantly babysitting the system.

@FormerMechanic's got it right — unlimited budget means you stop being clever and start being bulletproof. That's where the real value is. A system that genuinely doesn't require you to monitor it constantly or make compromises in winter.

Also: actual proper infrastructure. Decent cabling, proper enclosures, redundant monitoring, and the labour to install it all to spec rather than cutting corners in a van at midnight.

The 100kWh battery shed is just showing off. Give me reliability over capacity any

Honestly, I'd go mental with redundancy rather than just raw capacity. Dual inverters, separate battery banks for different loads, maybe even a small diesel genset tucked away for proper peace of mind. My static caravan's taught me that reliability beats raw specs every time — when something fails, you need a Plan B ready to go.

For a static caravan setup, I'd honestly prioritise a Victron Multiplus-II with proper battery management redundancy over sheer kWh. A decent 48V LiFePO4 system paired with a backup 24V Victron for critical circuits — keeps you running even if the main battery management goes belly-up. That's where unlimited budget actually earns its keep, not just raw capacity.