40 kW Kubota Diesel Generator

The 40 kW Kubota is our largest single-phase diesel generator and the only one listed with a built-in automatic transfer switch (an Aisikai ATS) as well as built-in plugs. It is powered by a four-cylinder Kubota V3600-T-GB at 1,800 rpm, rated 40 kW prime and 44 kW standby, with 220V single-phase output at 60 Hz, 166 A rated current and a Stamford S1L2-R1 alternator. The listing describes it as EPA Certificated Tier 4 Level.

An automatic transfer switch watches the utility supply. When the utility fails, the generator starts and the ATS moves the load over to it, then switches back when utility power returns. With the switch already built into the enclosure there is one less component to source for a standby installation. We confirm how it ties into your service during the site assessment.

Typical applications

Forty kilowatts of single-phase power suits larger homes, light commercial buildings and farms on single-phase service, especially where several motor loads such as pumps, compressors and air conditioners have to run together.

Fuel and runtime

At full load the spec sheet lists fuel consumption of 208 g/kWh, which works out to roughly 9.9 liters (about 2.6 US gallons) of diesel per hour. With the 80-liter (about 21-gallon) base tank that is around 8 hours at full load, and longer at the partial loads most sites actually draw.

Enclosure and controls

The silent canopy measures 2,200 × 950 × 1,430 mm, and the set weighs about 1,250 kg with its 80-liter base tank. A Deep Sea DSE6120 controller handles automatic starting, readouts and protective shutdowns.