Compare Generators Side-by-Side
Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Cat RP12000 E
- Aceup Energy AI2500S
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Cat RP12000 E | Aceup Energy AI2500S |
|---|---|---|
| General | ||
| Product type | Generator | Not available |
| Fuel | Gasoline | Gasoline |
| Inverter | No | Yes |
| Parallel capable | No | Yes |
| RV ready | Yes | Yes |
| Running watts | Winner: Winner: 12000 W | 1900 W |
| Starting watts | Winner: Winner: 15000 W | 2500 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 58 dB |
| Weight | 350 lbs | Winner: Winner: 44 lbs |
| Run time @50% load | Winner: Winner: 11.7 h | Not available |
| Run time @25% load | Not available | 10 h |
| Fuel tank | 13.2 gal | 1.32 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 35.7 x 32.7 x 35.8 | Not available |
| Electrical | ||
| Voltage (AC) | 120/240 | 120V |
| Voltage (DC) | 12 | 12V |
| GFCI outlets | Yes | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | No |
| THD | 5 % | 1.5 % |
| Engine | ||
| Engine | 670 cc Rato OHV V-Twin | 79.8cc 4-Stroke OHV Engine |
| Alternator | Not available | Not available |
| Starting system | Electric | Recoil Start |
| Warranty | ||
| Warranty | 2 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 12000 W | 1900 W |
| Starting watts | 15000 W | 2500 W |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 11.7 h | Not available |
| Run time @25% load | Not available | 10 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | true |
| Compliance | CARB, EPA | EPA Compliant |
| Security | Not available | Not available |
| Spark arrestor | Yes | No |
| Neutral | true | Not available |
| UPC | 815683023891 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 12000 | 1900 |
| Starting Watts (Gasoline) | 15000 | 2500 |
| Runtime @ 50% Load (Gasoline) | 11.7 | Not available |
| Runtime @ 25% Load (Gasoline) | Not available | 10 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 2x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) | One 120V 5-20R 20A Outlet |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 670 cc Rato OHV V-Twin | 4-Stroke OHV |
| Engine Displacement | 670 | 79.8 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 10 |
| Runtime @ 50% Load (Gasoline) | 11.7 | Not available |
| Controls & display | ||
| Display Type | Not available | Intelligent Gauge |
| Idle Control System | Not available | Eco Mode |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | No | No |
| Included equipment | ||
| Starting Components | Battery, Battery Charger, Wheel Kit | Not available |
| Included Accessories | Oil, funnel, tool kit, battery charger, battery, and wheel kit | Not available |
| Warranty & identification | ||
| Residential Warranty | Not available | 2 |
| Part Number | 502-3700 | AI2500S |
| Additional specs | ||
| Summary | The Cat RP12000 E is a 12,000-watt gasoline generator built for job sites, construction crews, and homeowners who need sustained power for multiple heavy tools or appliances simultaneously. The 15,000-watt peak output handles startup surges from air compressors, circular saws, and welders without stalling. At 350 pounds, this is a stationary or semi-portable unit. It ships with a wheel kit, battery charger, and full tool set, meaning users can operate it immediately without additional purchases. | The Aceup Energy AI2500S is a gasoline-powered inverter generator with a rated wattage of 1900 watts and a peak wattage of 2500 watts. |
- Most PowerfulCat RP12000 E12000W running
- QuietestAceup Energy AI2500S58 dB
- Longest RuntimeCat RP12000 E11.7h at 50% load
Where to buy
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Cat RP12000 E
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Aceup Energy AI2500S
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