• Cummins, 90 hp, 500 hour durability Test
• Cummins L-10, 300 hp
• Detroit Diesel Series 50, 240 hp
• Cummins 5.9 liter, 230 hp
• Cat 3406, 600 hp, 1500 hour durability (2 units)
• Cat 3406, 400 hp in Class 8 truck
• Cummins M11, 375 hp in Class 8 truck

Stationary Systems in Operation:

Georgia

• Cat 3516B, 2600 hp, peak shaving (2 units)
• Detroit Diesel DDC16V-149T, peak shaving (4 units)

Illinois

• Cat 3512, (1 unit)

New Jersey

• Cat G-3406, 460 hp 3000 hours estimated
• Mack T9, 1500 hours estimated
• Cat C-12, 1500 hours estimated
• Cummins KTA19-G4, (1 unit)
• Cummins LTA-10-G1 (1 unit)
• Cummins KTA19-G4 (2 units)

Pennsylvania

• Cat 3516, Peak Shaving (5 units)

Rhode Island

• Cat 3512B, Prime Power (1 unit)
• Cat 3516B, Prime Power (1 unit)
• Cat 3516B, Prime Power (1 unit)

Texas

• Cummins NTA 855 G3, Crane (1 unit)

Washington

• Cummins QSK60-G5, 2319 hp, diesel (16 units)
• Cat 3516B, 2593 hp, (2 units)
• Cummins QSK60-G5, 2140 hp, (5 units)

Systems in Engineering/Installation/Startup:

California

• Cat 3406, Duel Fuel, 401 hp, (1 unit)
  

Georgia

• Cat 3512, 1400 hp, peak shaving (1 unit)
• Detroit Diesel DDC 16V149T, diesel (4 units)
  

Illinois

• Cat 3516, (1 unit)
  

Nevada

• Cummins QSK60-G6, 2922 (18 units)
  

New Jersey

• Cat 3512, (3 units)
• Cat 3516, (4 units)
  

New York

• Cooper Bessmer, GMVH-8, (2 units)

Washington

• Cummins QSK45-G4 1622 hp, prime power (20 units)
• Cat 3512B, 1500 hp, diesel, (1 unit)
• Cat 3516B, (12 units)