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Kohler 20.5EFKOZD Specs (Power | Consumption)

Written by Ernie Lo in Specs Last Updated August 18, 2026

The Kohler 20.5EFKOZD generator is listed with standby output of 20 kW, Diesel fuel, 50 Hz operation, 6 available voltage configurations, Single phase, and rated current of 78 A.

Kohler Generator Specifications

Generator • Diesel • 50 Hz • Single phase

Standby power: 20 kWVoltage options: 6 configurationsRated current: 78 ADry weight: 950 lb (431 kg)

Key specifications

20 kW Standby power
Diesel Fuel
6 configurations Voltage options
Single phase Phase
78 A Rated current
950 lb (431 kg) Dry weight
50 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Fuel consumption by load
How fuel use changes as generator load increases.
25% load

0.61 gal/hr

50% load

0.98 gal/hr

75% load

1.39 gal/hr

100% load

1.77 gal/hr

Power-to-weight
Standby output per 1,000 lb of dry weight versus similar-output Kohler models.
This model

21 kW

Peer average

23.7 kW

58th percentile
Power output
Low 20 kW High 20 kW
Standby

20 kW

Prime

20 kW

Model spec snapshot
Representative numeric specifications from this generator.
20 kWStandby
78 ACurrent
950.19 lbWeight

How the Kohler 20.5EFKOZD compares

This compares the supplied numeric specification with Kohler generators in the same broad standby-power class where enough comparable data exists.

Standby power
20 kW
4% below avg
49th percentile
Rated current
78 A
15% below avg
32nd percentile
Dry weight
950 lb
15% below avg
44th percentile
Oil capacity
2.91 gal
62% above avg
91st percentile
Standby power20 kW
Low 15 kWAverage 20.7 kWHigh 28.1 kW

About 4% below the similar-output Kohler average. Around the 49th percentile for this field.

Rated current78 A
Low 64 AAverage 92 AHigh 162 A

About 15% below the similar-output Kohler average. Around the 32nd percentile for this field.

Dry weight950 lb
Low 487 lbAverage 1,116 lbHigh 2,961 lb

About 15% below the similar-output Kohler average. Around the 44th percentile for this field.

Oil capacity2.91 gal
Low 0.5 galAverage 1.8 galHigh 2.92 gal

About 62% above the similar-output Kohler average. Around the 91st percentile for this field.

This model Peer average

Generator information

Manufacturer Kohler
Model 20.5EFKOZD
Generator type Generator
Fuel Diesel
Frequency 50 Hz

Electrical output

Standby power 20 kW
Prime power 20 kW
Standby kVA 20.0
Voltage options 110/190 V, 115/230 V, 120/208 V, 230/400 V, 240/416 V, 220/380 V
Phase Single phase
Rated current 78 A

Engine, cooling and controls

Oil capacity 2.91 gal (11 L)
Coolant capacity 1.16 gal (4.4 L)
Maximum ambient 77 °F (25 °C)
Controller Decision-Maker, Decision-Maker 3500
Alternator 4E5.0b

Physical specifications

Dry weight 950 lb (431 kg)
Dimensions (L × W × H) 44.8 × 22.7 × 27.3 in (1138 × 577 × 694 mm)

Battery

Battery cranking 650 CCA
Battery voltage 12 or 24 volt V

Fuel consumption

Standby 0.61 gal/h (2.3 L/h) @ 25%; 0.98 gal/h (3.7 L/h) @ 50%; 1.39 gal/h (5.2 L/h) @ 75%; 1.77 gal/h (6.7 L/h) @ 100%

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Kohler North America generator website.

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Ernie Lo

Ernie Lo is a qualified web designer and web developer. He works as an IT support technician and website manager at Benleigh Vending, and he also fixes vending machines.

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