A truck you can build, fix and fuel yourself.

An extended cab on an eight-foot wooden flatbed with stake sides. The body is flat galvanized steel panels on a steel cab frame, folded in a sheet-metal brake and bolted on, so a damaged panel is cut again from its drawing.

Two electric motors, one for each axle, make it four-wheel drive with no transfer case — and if one drive fails, the other brings it home. Each motor has its own battery pack, like an old pickup’s two fuel tanks, with a switch on the dash to show either one.

Each motor rides on its own axle, above the differential — one under the hood, one under a hatch in the deck — so it is serviced from above and sits out of the road spray. A small two-speed gearbox at the axle's nose drives it: high range for the road, low range for a trailer or the field. No driveshaft.

The four battery boxes ride in two bays between the frame rails, one behind the front wheels and one ahead of the rear, and come out from underneath on a lift trolley.

Turn the truck in 3D — every part drawn: steer it to full lock, twist the axles, and lift the body off to see the frame, the battery boxes and the cab’s tube frame.

A diesel version for the road — a used Cummins 12-valve, a five-speed and a transfer case, heavy-duty pickup brakes and a 4,500 kg rating: the plated diesel truck in 3D.

And one for the desert — solid axles on long-travel links, a built 12-valve turned around behind the crew, and a steel-tube cage a home shop can MIG-weld, for about the price of a new Raptor in parts: the rally truck in 3D.

The Drumlin cell box is sixteen lithium iron phosphate cells in a stainless case: 51.2 volts, 14.3 kilowatt-hours, about 142 kilograms. There is no electronics inside it — the battery management lives in whatever it plugs into, so the box itself is cells, copper, a fuse and a connector.

The same box rides in the truck, sits in a leg of the tractor, or stands on a rack in the house as backup and solar storage. A lift trolley moves it: roll it under, pump the deck up with your foot until the guides catch, and four latches close with a flag you can see.

Watch a box dock — step through the lift, or hide the case to see the cells inside.

The track is a setting, not a fixture: change the bridge and the same machine straddles one wide bed or two narrow rows. The second tractor is one small articulated machine, 40 inches wide — the raspberry alley is four feet in spring — copied from the narrow vineyard tractors: four equal tall tyres, all driven, the operator in front, a low 100-gallon tank and vertical booms behind: the raspberry sprayer in 3D. A 600-gallon nurse trailer carries clean water to the field; the sprayer fills itself from it, so the trailer needs no pump and no power: the nurse trailer in 3D. For a spray drone there is a double-deck trailer — a landing deck on top, water, an inductor, a generator and a battery box below, under 7,000 pounds: the drone tender in 3D.

Every box bought for a machine is also storage for the house, and every box on the house rack is range for a machine. So independence grows slowly: a box and a few panels at a time, each step paying for itself before the next.

It is honest about winter. A kilowatt of panels here makes about a third as much in winter as in summer, and a battery holds hours, not seasons. Sun and batteries carry the summer and the daily loads — pumping, spraying, driving, the house’s evenings and outages. Winter heat stays with wood, stored heat and a heat pump, with the grid as backup.

Regional Wisconsin seasonal averages (profilesolar.com). Filling one battery box a day takes about 1.9 kW of panels in summer and 5.6 kW in winter.

Show as a table

Season	kWh per kW per day
Winter	2.32
Spring	5.14
Summer	6.64
Autumn	3.34

Every part is modelled as a solid and checked by machine before anyone trusts it: no two parts may pass through each other at any point of their motion, every contact has to seat, and every number on a page comes from the model itself. The whole truck — 330 parts — has been checked through full steering lock and full axle twist; the frame, the gearbox, the battery box, the lift trolley and both tractors each pass on their own.

Every safety system has a named standard before a drawing is trusted — the federal brake, roof, belt and high-voltage rules, and Wisconsin’s own inspection for a homemade vehicle — and where a standard cannot be met in a home shop, the plans say so.