Ford Transit Solar Calculator
The Transit is the value pick, and its flat-ish roof takes panels easily. High-roof extended builds have space for 600 W or more. Transit AWD winter rigs should plan for the cold-weather LiFePO4 penalty and a heated battery. A mid-size 200–300 Ah bank suits most Transit conversions running a fridge, fan, lights, and a mobile office.
Roof space: Around 60–90 sq ft depending on wheelbase and roof height, typically 400–700 W.
Fitting panels to a Ford Transit
Transit roof area swings a lot between the regular and extended wheelbase and between mid and high roof, so measure before buying panels rather than trusting a spec sheet. The roof has pronounced ribs, which is good news: they give solid mounting lines for brackets and let air move under the panels. That airflow is worth real output, because a panel pressed flat to a hot roof loses efficiency as it heats.
Solar alone, or solar plus alternator?
Transits are common as both weekend and full-time builds, so the right charging mix varies more than on other models. Weekend builds are usually fine on solar alone. Full-time Transits with a laptop and Starlink land around 1,200–1,500 Wh a day, which is the point where a second charging source stops being optional.
A representative Ford Transit build
Based on the preset loads below (1,365 Wh/day at 4.5 peak sun hours).
- Daily energy
- 1,365 Wh
- Solar array
- 405 W
- Battery (LiFePO4)
- 285 Ah
- MPPT
- 50 A
- Wire & fuse
- 2 AWG · 175 A
- Est. cost
- $1,491–$4,317
Adjust the preset below for your exact appliances, location, and cold-weather needs. The calculator recomputes everything live.
Quick start with a profile:
Your daily loads
Add each device with its watts and hours per day.
No loads yet. Add your fridge to start, or pick a profile above.
Solar array
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Add loads to size your array.
Show the math
Battery bank
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Show the math
Charge controller (MPPT)
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Show the math
Inverter
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Show the math
Battery-to-inverter wire & fuse
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Show the math
Estimated cost
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Budget street price → premium brands.
Itemized breakdown
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Free to use on your own site — just keep the credit link. Sizing and options.
Next steps for your Ford Transit
- Compare battery chemistry in the LiFePO4 vs AGM guide.
- Check your region's sun with the location pages.
- Get the wire right with wire gauge sizing.
- Work through the full pre-purchase checklist.