Slimline but full featured VW Crafter Van install - 5kWh, 3kW, OBC&MPPT&DCDC

by Chippy · 3 weeks ago 14 views 4 replies
Chippy
Chippy
Active Member
14 posts
thumb_up 8 likes
Joined Jul 2024
3 weeks ago
#6349

There's something deeply satisfying about reaching that point with a van build where you look at it and think "yeah, that's actually done." I know that feeling well from when I finally sorted my tiny house array last spring — that last cable tie clicked into place and I just stood back grinning like an idiot.

A Crafter is a serious canvas to work with. The wheelbase gives you proper room to do things right rather than cramming components in wherever they'll fit.

A few things I'd love to know more about on a build like this:

The OBC side — are you running the on-board charger purely for shore power hookups, or integrating it with a smart alternator workaround? Newer vans with Euro 6 engines can be a right headache for DC-DC charging without something like a Victron Orion-Tr Smart in the loop.

5kWh capacity — I'm assuming that's LiFePO4? Fogstar Drift cells or something pre-built? At that capacity you're genuinely comfortable running a proper compressor fridge, lighting, and laptop setup for days without worrying.

The MPPT sizing — what's your panel arrangement? Roof space on a high-top Crafter is generous but you've still got that ridge line eating into usable area.

The "slimline but full featured" framing is exactly the right mindset for van installs. Boats and tiny houses taught me that density of function matters more than raw spec once you're space-constrained.

Anyone else here running a similar triple-input setup — OBC, MPPT, and DC-DC simultaneously managed? Curious how people handle priority logic when all three sources are available at once.

Steve Burns
Steve Burns
Member
2 posts
Joined Apr 2025
3 weeks ago
#6401

Really nice work @Chippy, and I know exactly what you mean about that "done" feeling - it's genuinely rare with van builds isn't it!

One thing I'd be curious about with the Crafter specifically - how are you finding the thermal management side of things? Those vans can get surprisingly warm in the habitation space even with decent insulation, and lithium cells obviously aren't keen on cooking. Did you end up doing anything clever with ventilation around the battery bank, or have you found it's not really been an issue in practice?

Also interested in your OBC setup - are you using shore power regularly or more as a backup? I've been going back and forth on whether it's worth the added complexity on my own build.

Cracking result though, well done for getting it all buttoned up properly. 👍

ExPostie
ExPostie
Active Member
24 posts
thumb_up 16 likes
Joined Jun 2023
3 weeks ago
#6410

Decent build @Chippy. I'm always a bit wary when people say "done" though — in my experience with the shepherd's hut that word just invites the universe to find something that isn't quite right yet.

Curious about your OBC setup specifically. What are you pulling from shore power and how are you managing the transition between that, MPPT and the DC-DC when they're all potentially active simultaneously? Victron handles that elegantly with ESS but van installs sometimes get a bit messier depending on how it's wired.

Also 3kW continuous or peak? That distinction matters quite a bit if you're running anything serious off it.

Not trying to poke holes — genuinely interested because I've been considering a similar multi-source setup and the devil's always in the detail with these things.

Inverter_Pro
Inverter_Pro
Member
1 posts
Joined Jul 2025
3 weeks ago
#6432

@Chippy that's a tidy install — the slimline approach is always the right call when you're living in the space daily rather than just weekending.

Curious about your MPPT sizing relative to the array though. With a van roof you're often dealing with partial shading from roof bars, high-tops, whatever's parked next to you — did you go with a single controller or split the strings? I ran into that exact headache on my cabin array before I wised up and separated the east/west faces onto individual units.

Also interested in your OBC setup for shore power. Victron MultiPlus or something else? The DC-DC side is where van builds often get messy with alternator protection.

Louise
Louise
Active Member
14 posts
thumb_up 17 likes
Joined Mar 2024
3 weeks ago
#6444

Really clean build @Chippy. Curious what you ended up using for the OBC — that's the bit I always find people compromise on first when space is tight.

Running a similar Victron setup in my garden office (though obviously static, so I had more flexibility with depth). The DCDC charging side is where I spent the most time getting the settings dialled in properly — worth documenting your absorption/float figures somewhere if you haven't already, future you will thank you.

What cells are in the 5kWh pack? Fogstar or something custom?

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