Hi all — narrowboat solar upgrade planned

Found myself browsing this forum for months before finally signing up—figured it was time to jump in properly.

I'm currently living on a narrowboat (well, technically moored on a canal near Birmingham, though I spend half my time at a shepherd's hut site in Shropshire). Bit of an unconventional setup, I know. The narrowboat's been my main residence for about three years now, and I've managed to keep it running on a modest solar array—four 400W panels and a Victron MPPT controller—but honestly, it's been tight during winter.

The real driver for an upgrade is my EV charging situation. I've got a Nissan Leaf that I'm desperate to charge properly off-grid rather than queuing at public points constantly. I've been looking at dedicated EV charging infrastructure and realised my current system just won't cut it. So the plan is to roughly double my solar capacity, upgrade the battery bank (probably going lithium—Fogstar or similar), and potentially add a small wind turbine to the boat for winter months.

The shepherd's hut complicates things because I'm not ready to commit to permanent wiring there yet, but it's actually forcing me to think modularly. Interested in portable solar solutions alongside the boat's fixed installation.

Would love to hear from anyone else juggling renewable energy across multiple properties, or folks with experience integrating EV charging into off-grid systems. Suspect there's a fair bit of trial and error ahead of me, so any lessons learned would be brilliant.

Brilliant, welcome aboard! Narrowboat solar is a cracking project — you'll get loads of good advice here. The canal community is pretty sound too.

What's your current setup like? Battery bank, leisure battery only, or starting from scratch? There's quite a few of us running boats with decent solar systems — the space constraints are a bit tricky but absolutely doable. Victron kit tends to be popular for boats given how robust it is, though Renogy have some decent panels these days.

Birmingham's a good spot for it actually — you'll get reasonable sun most of the year once you're sorted. The moorage situation can be a nightmare for south-facing positioning, but you'd be surprised what angle you can squeeze out sometimes.

Stick around and drop your specific requirements in the Solar forum when you're ready — folks here are genuinely helpful with the technical bits.

That's exciting! I've been looking at solar for my van conversion and the fundamentals are similar to what you'll need on the boat — though you've got the advantage of more roof space, obviously.

A few quick questions before you dive in: what's your current power setup like? Are you running a leisure battery already, or starting from scratch? And crucially — how much are you actually trying to power? That'll determine whether you need a modest 200W system or something beefier.

The canal near Birmingham is decent for solar generation, though winter can be grim. Worth thinking about whether you'll need a backup petrol generator or shore power for those dark months.

What batteries are you considering? Lithium or sticking with lead-acid? That choice will massively affect your budget and system design. Happy to swap experiences as you get planning — always useful hearing what actually works in practice rather than theory.

Narrowboat solar is a rewarding setup—I've been running a similar system on my static caravan for three years now and the principles translate well to canal living. The main consideration you'll face is shading from trees and bridges, which can absolutely tank your generation on certain stretches.

For a narrowboat specifically, roof space is obviously premium. I'd recommend Renogy or Fogstar panels if you're weight-conscious—they're lighter than some alternatives and perform decently in partial shade. A quality MPPT controller (Victron's SmartSolar range is worth the investment) makes a genuine difference with inconsistent light conditions.

What's your current battery setup? And are you planning to upgrade to lithium or sticking with lead-acid? That decision massively impacts controller choice and overall system design. Also worth considering: canal-side mooring locations vary wildly for solar exposure—some spots are genuinely dire.

Happy to walk through specific component recommendations once you've got more details sorted.

What's your current power situation like on the boat? Are you running off leisure batteries already, or straight from the mooring's shore power?

I'm curious about your roof space constraints—narrowboat roofs are notoriously tricky with the curved design and all the vents/chimneys. I've been eyeing up a similar setup for my shepherd's hut and keep running into the same problem, just in a different form.

How many amps are you typically drawing? That'll make a big difference to whether you go with rigid panels mounted permanently or something more flexible. Also worth asking: are you planning to stay at this mooring long-term, or do you move about? That affects whether it's worth the installation hassle.

@DorsetExplorer's spot on about the advice here—I've already learned loads about battery management from folks on this forum. Victron gear seems to be the consensus recommendation for narrowboats from what I've gathered.

Are you looking to go fully off-grid from shore power, or just supplement it?

Narrowboats are brilliant for solar actually — you've got decent roof space and minimal shading issues if you're moored sensibly. The key thing is managing your water usage alongside power, since both are finite on the move.

I'd ask: are you planning to stay put most of the time or cruise regularly? That changes your approach quite a bit. If you're semi-static, a larger array makes sense. If you're moving weekly, you'll want something robust that won't get damaged by frequent repositioning.

Also worth considering — what's your current leisure battery bank? If it's old lead-acid, you might be better replacing it with LiFePO4 at the same time. The solar payback works much better with decent battery storage. A Victron MPPT controller is worth the investment too, especially in our cloudy climate.

The canal community tends to have good experience sharing on this stuff. Definitely chat with neighbours — you'll find someone running a similar setup within a few locks.

What size array are you thinking?

Brilliant to have another narrowboat person join up. @DaleVicky, the canal near Birmingham's got some solid sun exposure compared to what you'd think — I've been running a setup on mine for about five years now and the winter output's still decent enough to keep things ticking over.

One thing worth considering that doesn't always get mentioned: canal boats move. Even if you're semi-permanent moored, you might shift for a pump-out or heading south for winter. I went with four rigid panels on the roof originally, but honestly, the vibration from engine and traffic meant I ended up retrofitting some of them with extra fixings. If you're planning an upgrade, check your roof structure now — some boats aren't built to handle the weight distribution brilliantly.

What's your current battery bank like? That's usually the real limiting factor. I'm running a Victron setup with two 200Ah LiFePO4 in series and it's transformed how I live on board. Makes a proper difference to not rationing power in December.

What kind of usage are you looking at?

Nice one, welcome aboard. Birmingham's actually decent for solar given you're not surrounded by tall buildings on the cut.

Few things worth knowing upfront — roof space on narrowboats is genuinely good, but you'll want to think about weight distribution and wind loading. I've got 400W across my boat and it makes a noticeable difference to my leisure battery setup.

What's your current battery bank like? That's usually the limiting factor rather than panel output. If you're still on old lead-acid, upgrading to a decent LiFePO₄ system (Victron or similar) will transform how much you can actually use from your panels. The charge controller matters too — MPPT rather than PWM if you can stretch to it.

One quirk with narrowboats specifically — you'll need to consider canal-side vegetation. Even decent sun exposure can get shaded seasonally, particularly in winter. Worth scoping your mooring location across a few months if possible.

What's your power consumption like currently? That'll shape whether you need 400W or 1kW+ to make it worthwhile.

Decent that you've taken the plunge and joined properly, @DaleVicky. Narrowboats are genuinely one of the better setups for solar if you can sort the roof space.

Quick question though — how much battery capacity are you working with currently? That's usually the limiting factor on boats rather than panel output. The reason I ask is because roof real estate is precious, so you want to make sure your system's actually balanced. I've seen folks bolt on panels without upgrading their batteries and end up with wasted generation potential.

Also worth checking what your current consumption looks like — heating, water pump, fridge, all that adds up quick on a boat. Once you know that, you can work backwards to figure out whether you need 400W or 1200W of panels.

What's your rough budget looking like for the upgrade? That'll shape whether you're looking at Victron kit (bulletproof but pricey) or something like Renogy for better value. And are you planning to stay moored in one spot or cruise about? Makes a difference with orientation and shading issues.

Brilliant to have you here mate. Narrowboat solar's where it's at really — you've got space for panels, decent battery setups, and no grid bills to worry about.

Since you mentioned Birmingham specifically, you're in decent territory. I've got a boat setup myself and the key thing nobody mentions until you're doing it is the shading issue — trees, bridges, other boats. Worth a proper site survey before committing to panel placement.

What're you looking at for capacity? A lot of narrowboats end up with around 400-600W depending on usage patterns. Battery-wise, LiFePO4's become much more sensible than it was five years ago, though initial cost stings a bit.

The community here's proper helpful with narrowboat specifics — loads of people running everything from charging phones to actual EV trickle charging off their roof. Ask away when you get stuck.

Right, welcome to the forum properly @DaleVicky. Narrowboats are genuinely ideal for off-grid living — you've already got the hull structure sorted, which is half the battle.

What's your current power setup? Most narrowboat owners I've encountered are running 100-200W of panels into a basic MPPT controller, which honestly isn't enough if you're wanting to run much beyond LED lighting and phone charging. The real advantage you've got is roof space and the ability to add more panels without planning headaches that house dwellers face.

Battery capacity is where most people go wrong though. Lithium's become far more affordable in the last few years — worth ditching the old lead-acid if you're upgrading. Something like a Victron LiFePO4 system scales nicely on a boat, and their monitoring via VRM is brilliant for keeping tabs on everything remotely.

Canal-side mooring near Birmingham should give you reasonable solar exposure once the winter months pass. You'll lose a fair bit of generation October through February regardless of setup, but that's just the reality in this country.

What's your power budget looking like? That'll

@DaleVicky — welcome aboard properly. Good timing on the introduction, especially with solar upgrade plans in mind.

What's your current setup looking like? Are you working with leisure batteries already, or starting from scratch? I'm asking because narrowboats present some interesting constraints that don't always come up with static installations.

The roof space is definitely an advantage compared to what I'm managing in my garden office, but canal-side mooring can mean shading issues depending on how many trees you've got overhead and which direction you're facing. Worth checking your actual winter solar yield potential before speccing panels.

Which area near Birmingham are you on? That'll affect your insolation figures too. Also — have you looked into the weight distribution aspect? Extra battery capacity and panel mounting needs careful planning on a boat, unlike my setup where I could just bolt things to the structure without worrying as much.

What's your power consumption looking like currently? That'll drive whether you're looking at a modest Victron setup or something more substantial. The narrowboat community on here tends to have some solid experience with space-constrained solar, so you're in the right place for it.

@DaleVicky welcome aboard. Narrowboats are genuinely brilliant for solar — roof space is often underutilised. Before you spec anything, worth knowing: what's your current battery capacity and inverter setup? Canal location matters too (shading from trees, winter light angles). That'll determine realistic kWh generation and whether you need additional charging (wind turbine, alternator upgrade). Happy to dig into specifics once you've got those details sorted.

I lived aboard a narrowboat for three years before moving to the shepherds hut—solar was genuinely transformative for reducing engine hours. The roof space is perfect for panels, though weight distribution matters more than people realise. What's your current battery setup? That'll dictate everything else about the upgrade. The canal community here tends to favour Victron kit, which plays well with narrowboat systems.