A spray drone trailer carries everything that keeps the drone flying: a generator and charger, cooled battery storage, a water nurse tank with a transfer pump, a mixing station for chemicals, and room for the drone itself. The goal is a loop where one battery flies, one cools and one charges while the tank is refilled in under a minute. For an Agras T50, DJI's D12000iE generator charges a battery in about 9 to 12 minutes in lab conditions, which sets the pace for the whole setup.
Power: generator and charging
- Generator. The D12000iE runs on unleaded gasoline, has a 30 L fuel tank and a 9,000 W DC charging output, plus a 12 V supply for DJI's air-cooled heat sink and a small AC outlet (120 V, 750 W in the US). The T100 pairs with the larger D14000iE, which weighs about 87 kg.
- Grid charging. The C10000 charger can run on shore power, but on 100 to 120 V input its output is limited to 3,000 W, so it's slower than the generator.
- Placement. Mount the generator at the back or side of the trailer with exhaust pointing away from the crew and the mixing area. Keep fuel cans separate from chemicals.
Battery handling and cooling
Batteries come off the drone hot, and DJI's manual says to put them in an air-cooled heat sink to charge, or charging may be disabled. Keep at least 30 cm between the charger and charging batteries, never charge on flammable surfaces, and never cool a battery with water. The T50's DB1560 weighs about 12.1 kg, so mount racks at a comfortable lifting height. Plan for three to four batteries per drone so you never wait on a charge.
Water and mixing
- Nurse tank: sized for a full day or half day of spraying at your typical application rate. Remember each T50 load is 40 L; a T100 takes 100 L.
- Transfer pump with a hose that reaches the drone where it lands, plus a flow meter if you mix by volume.
- Mixing station: an inductor or mixing tank, measuring containers, and clean water for rinsing. Follow every product label for mixing order and rates.
- Clean water tank separate from the mix, for handwashing, eyewash and emergency rinsing.
Layout that works
- Landing area on one side, clear of the trailer and people.
- Refill and battery swap point next to the landing area.
- Charging and cooling station behind it.
- Generator farthest from the crew, downwind if possible.
- Chemical storage locked and separate from fuel.
Truck beds, flatbed skids and enclosed trailers all work. Many crews use a small dolly or cart to move the drone and batteries around the field.
Safety and compliance
- Carry PPE required by the pesticide labels, a spill kit and fire extinguisher.
- Follow your state's rules for transporting and storing pesticides, and DOT rules for hauling fuel and batteries.
- Keep application records your state requires.
See spray drone license for the FAA and state approvals.
Daily cleanup
DJI's manual calls for rinsing the spray system with clean or soapy water three times at the end of each spraying day and soaking the sprinklers and tank strainer. Build a rinse station into the trailer. More in spray drone maintenance.
Specs and rules current as of October 2026. This is general information, not legal advice.
Need an Agras quote with generator and batteries? Contact us or compare the Agras T50 and Agras T100.
Related guides
- Spray drone batteries and generators: how many do you need?
- How much does a spray drone cost? DJI Agras prices
- Spray drones for US farms
- DJI Agras T100 vs Agras T50: which spray drone fits your operation?
- Financing a spray or thermal drone: loans, leasing and grants
- How agricultural spray drones work
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