Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
| Specification | Generac #8947 iQ5200DF | Yamaha EF4500iSE |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | No |
| RV ready | No | No |
| Running watts | 3900 W | Winner: Winner: 4000 W |
| Starting watts | Winner: Winner: 5200 W | 4500 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 58 dB |
| Weight | Winner: Winner: 107 lbs | 209 lbs |
| Run time @50% load | Winner: Winner: 9 h | Not available |
| Run time @25% load | 15 h | 15.2 h |
| Fuel tank | 3.2 gal | 4.5 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 24.6 x 20.3 x 22.5 | 30.7 x 24.3 x 27.2 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 5 | Not available |
| GFCI outlets | Yes | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | 3 % |
| Engine | ||
| Engine | 223 cc OHV 4-stroke | Yamaha MZ360 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Electric |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3900 W | 4000 W |
| Starting watts | 5200 W | 4500 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 | 9 h | Not available |
| Run time @25% load | 15 h | 15.2 h |
| Propane | Not available | Not available |
| Running watts | 3500 W | Not available |
| Starting watts | 4700 W | Not available |
| 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 h | Not available |
| Run time @25% load | 20 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | true |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Floating |
| UPC | 696471104509 | 765053833196 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3900 | 4000 |
| Running Watts (Propane) | 3500 | Not available |
| Starting Watts (Gasoline) | 5200 | 4500 |
| Starting Watts (Propane) | 4700 | Not available |
| Runtime @ 50% Load (Gasoline) | 9 | Not available |
| Runtime @ 50% Load (Propane) | 11 | Not available |
| Runtime @ 25% Load (Gasoline) | 15 | 15.2 |
| Runtime @ 25% Load (Propane) | 20 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R) | 1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 223 | 357 |
| Engine Oil Type | 10W-30 / SAE 30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 15 | 15.2 |
| Runtime @ 50% Load (Gasoline) | 9 | Not available |
| Runtime @ 50% Load (Propane) | 11 | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection, CO monitoring |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Oil, funnel, tool kit, propane hose, and battery | Not available |
| Included Accessories | Oil, funnel, tool kit, propane hose, and battery | Battery |
| Warranty & identification | ||
| Part Number | 8947, 8945 | EF45ISEZ |
| Additional specs | ||
| Summary | The Generac iQ5200DF is a 3,900-watt dual-fuel inverter generator that bridges emergency home backup and recreational use. At this output level, it powers essential circuits like refrigerators, sump pumps, and window air conditioners simultaneously, but not a full house or central HVAC. The dual-fuel design lets owners switch between gasoline and propane based on availability, a genuine advantage when supply chains break down during extended outages. Because the iQ5200DF produces electronically regulated current with less than 3% THD, laptops, flat-screen TVs, CPAP machines, and smart home devices run safely without voltage-related risk. | The Yamaha EF4500iSE is a 4500-watt inverter generator designed for maximum efficiency and minimal noise, suitable for emergency backup, recreational use, and DIY projects. |
