
Diesel & Natural-Gas Generator Sets
20 – 30 kW generator sets commonly use 2.5 – 4.5 L engines. The H-900 is the recommended unit — heavy-duty industrial cabinet, 900 ml/min hydrogen output, rated up to 7.0 L. D-900 extends coverage up to 16.0 L for large stationary plant. Units feed directly from the generator starting battery at 12 / 24 V DC, avoiding the older AC-inverter arrangement.
PEM units suited to generator-set duty

A-900 PEM Engine Enhancement System
- Application
- 2.7 – 7.0 L
- Output
- 900 ml/min
- Voltage
- 12 – 24 V DC
- Power
- 170 W
Duties & taxes are included on most destinations. Select your country for the exact arrangement.

H-900 Heavy-Duty PEM Enhancement System
- Application
- Up to 7.0 L
- Output
- 900 ml/min
- Voltage
- 12 / 24 V DC
- Power
- 160 W
Duties & taxes are included on most destinations. Select your country for the exact arrangement.

D-900 Heavy-Duty PEM Enhancement System
- Application
- Up to 16.0 L
- Output
- 900 ml/min max
- Voltage
- 12 / 24 V DC
- Power
- 160 W
Duties & taxes are included on most destinations. Select your country for the exact arrangement.
Compact vehicle and light commercial duty cycles up to 7.0 L. Not specified as the primary genset unit — choose H-900 for continuous-duty installations.
Recommended unit for 20 – 30 kW generator sets. 900 ml/min output in an industrial cabinet — vibration-isolated, behind-cab / pad-mount, onboard ion-exchange polisher, continuous-duty packaging.
Large stationary plant and engines 7 – 16 L. 4 L reservoir for extended autonomy on continuous-duty industrial installations.
Model the economics for your generator set
Enter your L/hr, operating hours and the reduction you want to model. Scenario only — not a savings prediction.
Fuel Cost Scenario Calculator
Scenario modelling, not a savings prediction. You choose the assumed reduction — we never suggest a figure is typical or expected.
Scenario modelling — pick a reduction to evaluate. Not a prediction.
Recommended: H-900 for generator-set duty. Payback is calculated against sets × system delivered price.
Results are illustrative only. Actual performance depends on engine condition, duty cycle, fuel quality, installation and operating conditions.
Field evaluation is required before any commercial decision. Fleet Trial Programme →
Recommended generator-set trial protocol
- 01Instrument one generator set
- 02Baseline fuel burn at steady load
- 03Install one unit
- 04Compare fuel burn, smoke, combustion stability and operating condition
- 05Add a second unit in parallel only if response is below target
What the manufacturer test data shows
Manufacturer test data reports selected fuel-consumption reductions in the 15 – 20% range, reduced carbon accumulation and smoke, and improved combustion stability. Actual results vary materially with engine condition, duty cycle, load profile, fuel quality, installation and operating conditions. Field evaluation is required before commercial projection.
These are combustion-enhancement devices. No emissions-compliance or fuel-saving guarantee is expressed or implied. Professional installation and controlled field evaluation are recommended.
Free worldwide delivery. Duties & taxes included on most destinations; where pre-payment isn't permitted, the carrier collects them on arrival. 12-month manufacturer warranty. See Shipping & duties by country for the exact arrangement for your destination.