NOVA-2000 generator is a high efficiency generator designed for multicopters and VTOL Fixedwings. NOVA-2000 generator is only 4kg which is much lighter than any other generators that produce 2000w output power, so NOVA generator is five times the efficiency of other generators. The continuous power output  of generator is 1800w. An internal combustion engine consumes gasoline and spins a generator to ensure a 48V output. Besides this, a 12S lipo battery package is also needed to be installed onboard to offer emergency back-up power for quick climbing and quick maneuvering. 
With this generator, the max take-off weight can reach 21kg(according to your power system), and the max flight time is about 5 hours. This NOVA generator is the heart of GAIA 160-hybrid hexacopter which is the world record keeper by crossing sea bay in 175 minutes. As an onboard 2000w generator, NOVA offers plenty of power to motors to ensure a long flight time. And someone has equipped M600 with this NOVA-2000 generator, the flight time is up to 1 hour with 2L gasoline. But currently GAIA 160-Hybrid is the most efficient multicopter that equipped with NOVA hybrid generator, the max flight time is up to 5 hours.
NOVA-2000 generator is suitable for those multicopters whose power is still lower than 1800w even with 6kg generator system(including generator, fuel tank and 1L gasoline). As for the fuel, the auto gasoline is available. When the generator running, its noise level is about 80 dBA. But the noise has no effect if you talk 10 meters away from the drone. We also provide the silencer if you need which could reduce the noise to 60 dBA.
Also maintenance is necessary for NOVA-2000 to keep its high performance. The maintenance cycle is 50 hours. And we will also provide the accessories for generator maintenance.

Specifications:
Generator weight: 4kgVoltage: 48VGenerator output: 1.8kw(continuous), 2kw(max)Recommanded Max take-off Weight: 18kg for Quadcopter, 21kg for HexacopterFuel tank: 3.5LFuel consumption: 1.5L/H(Max)Service temperature: -20 ~ 40°CApplicable UAV types: Multicopters, VTOL Fixedwings