Campervan electrical panel layout ideas

Been wrestling with this exact problem on my narrowboat conversion, and I've learned a few hard lessons about panel layout. The temptation is to cram everything into one central hub, but honestly, that's a recipe for chaos when you're troubleshooting at midnight in the middle of nowhere.

What's worked for me is splitting things logically: main breakers and battery isolators front and centre, then grouping circuits by function. Solar gear on one side, domestic loads on the other. Sounds daft, but when your water heater trips and you're bleary-eyed, you want to know exactly where to look.

The physical arrangement matters too. I mounted my Victron breaker panel vertically at eye level rather than tucking it away—saves hours of faffing about with a torch. Left plenty of space behind it for cable management; snug wiring leads to overheating and fried components. Use proper marine-grade labelling (not the printer ones that peel off after three months).

Cable sizing's crucial. Most people undersizing the main feeds between battery and panel, which causes voltage drop across the whole system. It's tempting to save a tenner on cable, but it costs you in efficiency and heat generation.

Curious what others have done—particularly those with split systems across a campervan. Are you keeping everything centralized or spreading distribution boxes around? And have you found any breaker brands that don't feel like they'll fail in a year? Been eyeing up some proper industrial-grade switches but they're pricey.

Spot on about avoiding the central hub problem. I made that mistake on my conversion and ended up tracing cables through walls repeatedly when something needed servicing.

What worked better for me was distributing based on functional zones rather than physical convenience. Keep your leisure battery isolator and main breakers near the battery itself—saves on cable runs and voltage drop. Then mount your consumer unit and DC distribution panel somewhere accessible in your living space, ideally near where you'll actually use the circuits.

The key thing nobody mentions: leave yourself a proper wiring schematic as you go. Takes an hour, saves countless hours diagnosing faults later when you've forgotten which breaker does what.

For EV charging circuits specifically, I'd keep those completely separate from your leisure circuits if possible—different earth paths, different protection requirements. Learned that lesson the hard way with my campervan setup.

What's your current battery spec and intended load profile?

The distributed approach is genuinely the way forward. I've got my garden office running off a small hybrid system, and splitting monitoring/control between my Victron MPPT near the panels and the MultiPlus in the living space meant I could keep cable runs sensible without sacrificing visibility.

What @KentBoater's touching on matters more than people realise—cable tracing in a confined space becomes a nightmare when everything's bundled together. Worth considering physical separation of your charge controller and inverter if you've got the space, especially in a campervan where every inch counts.

One thing I'd add: label everything before you seal anything up. Proper labelled diagrams mounted inside panel doors saved me hours of head-scratching during commissioning. Fusebox suppliers like Bussman do decent modular systems that don't require you to commit to a single monolithic design either.

What's your battery capacity looking like?

@CallumHobbs makes a solid point about the cramming temptation. I'm dealing with something similar in my garden office setup - started with one panel idea and quickly realised I'd be staring at a nightmare of cable runs.

What's worked better for me is splitting by function rather than geography. Charge controller near the batteries, breakers/disconnects at the point of load. Keeps your high-current stuff separate from monitoring/comms which hate interference.

A few practical bits I'd suggest:

• Label everything immediately - not after. You'll forget what you meant by "switched 12v" in six months
• Consider accessibility over aesthetics. You'll be troubleshooting at dusk
• Leave proper margins around components for airflow - especially if you're running Victron or similar gear that generates heat
• Keep your battery monitor and shunt in the same enclosure if possible

What's the amp capacity you're looking at? That might shift whether distributed actually makes sense for your setup or if you can get away with clever organisation in one panel.

The distributed approach @FETGeek mentions is spot on, but I'd add that your panel layout needs to match your actual usage patterns—not just electrical theory.

On my narrowboat, I learned this the hard way. I separated the high-draw stuff (water heater, fridge compressor) from low-draw auxiliaries (lights, fan). Keeps voltage drop manageable and makes troubleshooting infinitely easier when something goes wrong at 2am on the water.

Key things I'd recommend:

Physical separation matters. Put your main battery isolator and DC distribution where you can actually access it. Mine's mounted in the engine bay with weatherproof covers—pain to get to, but it beats crawling through a cupboard in an emergency.

Cable runs. Think about your actual cable routes before mounting anything. I see too many conversions where the "logical" panel position results in 10 metres of cable snaking through walls. Use the shortest sensible path.

Circuit grouping. Group by function (propulsion/domestic/safety) rather than voltage. Makes it easier to isolate issues and plan upgrades later.

Been there with my boat setup, and the distributed approach really does pay dividends once you've lived with it for a season or two. One thing I'd add though — don't just spread things out for the sake of it. Think about what you're actually switching on regularly versus emergency backup.

On mine, I've got the essentials (fridge, heating, navigation) on the main panel near the battery bank, but secondary loads like water heater and deck lighting are on a separate sub-panel in the galley. Saves running heavy cable runs everywhere and makes troubleshooting way easier when something trips.

Also worth considering your wire gauge upfront. Everyone says this but they mean it — undersized cabling will haunt you. I used Victron's advice on voltage drop and it's been solid. The initial install costs more but you'll avoid the frustration of replacing half your loom because you got creative with 2.5mm² cable on a 20A circuit.

The panel layout should follow your actual movement patterns on the boat or van, not some textbook schematic. What matters is reaching your main switches without contorting yourself in the dark.

Distributed layout's definitely the way. I've got my solar setup split between the garden office and main house rather than one massive panel, and it's saved me proper headaches when troubleshooting.

The key thing nobody mentions is cable runs. If everything's centralised, you're running long runs which kill efficiency and create voltage drop. Spread things out and you keep runs shorter — especially important with solar where every volt counts.

Also consider what you actually use regularly. My garden office setup has its own small breaker panel for the basics (lights, laptop charging, heating), separate from the main battery monitor. Way easier to isolate problems and tick things off when something's not working.

One practical tip: label everything properly before you build it. Sounds daft but honestly saves time later when you're in poor light trying to figure out which breaker does what.

What's your main power draw going to be in the van?

The distributed approach makes sense, but I'd push back slightly on one thing — it depends heavily on your actual usage patterns. On my boat, I tried splitting everything and ended up running between three different panels just to check battery state or flip a breaker. Now I've got a main monitoring point in the cabin where I can see the critical stuff (battery voltage, load amps, solar input) and then secondary disconnect points scattered about.

What's worked well is keeping the high-current stuff (solar breakers, battery isolator, main loads) physically close to where they actually do something, but centralising the intelligence. A decent shunt and monitoring display at your main living area costs about £80-150 and saves endless traipsing about.

Also worth considering is cable runs — your panel layout is partly dictated by where you can realistically route heavy gauge cable without it becoming a fire hazard. I wish I'd mapped this out properly first rather than retrofitting conduit everywhere.

What's your actual footprint, and where are you planning to site the battery bank?

Has anyone considered the cable run lengths with distributed layouts? I'm finding on my boat that spreading things out adds complexity with voltage drop — particularly between battery bank and distant breakers. What distances are you lot working with before you noticed issues? Thinking about a Victron setup but wondering if centralised monitoring outweighs the distribution benefits.