
Comparing the Genmax GM2200i and Champion 201317 inverter generators. See how they differ on runtime, noise, warranty, and real-world use cases.
These two portable inverter generators sit in the same lightweight class, but the Champion 201317 edges ahead in several practical areas. It delivers 1850 running watts and 2500 starting watts compared to the Genmax GM2200i's 1800 running watts and 2200 starting watts, giving it a meaningful 300-watt advantage on startup surges. That extra headroom matters when you're firing up a small air conditioner or a power tool with a motor.
The Champion is also noticeably quieter at 53 dB versus the Genmax's 58 dB, which is a real difference to your ears since decibels are measured on a logarithmic scale. It weighs slightly less at 39.7 lbs compared to 41.9 lbs, and it runs significantly longer at quarter load, stretching to 11.5 hours versus the Genmax's 8 hours. Perhaps most importantly, Champion backs its unit with a 3-year warranty, tripling the Genmax's 1-year coverage.
The Genmax GM2200i does hold a slightly higher overall score of 5.72 compared to the Champion's 5.44, which may reflect pricing or value considerations. Buyers who prioritize brand familiarity, longer warranty protection, and quieter operation will lean toward the Champion, while those looking for a budget-friendly inverter generator may find the Genmax appealing.
Choose the Genmax GM2200i if you're shopping on a tight budget and need a basic inverter generator for occasional use. Its 1800 running watts will handle essentials like charging devices, running lights, and powering a small TV or fan. The 8-hour runtime at 25% load is respectable for weekend camping trips or short tailgating sessions. If you don't plan to rely on the generator heavily and want to spend less upfront, the GM2200i gets the job done. Just keep in mind that the 1-year warranty means you're on your own sooner if something goes wrong, so this is a better fit for light, infrequent use rather than a workhorse role.
Choose the Champion 201317 if you want a more well-rounded package with fewer compromises. The 2500 starting watts give you a better shot at running small appliances with motors, like a compact RV air conditioner or a sump pump during a power outage. At 53 dB, it's quiet enough to use at a campsite without drawing complaints from neighbors, and the 11.5-hour runtime at quarter load means you can run it overnight without refueling. The 3-year warranty from Champion, a well-established brand in the portable power space, adds a layer of confidence that's hard to ignore.
For RV owners, the Champion's combination of lower noise, lighter weight, and longer runtime makes it the more practical travel companion. For home emergency backup, the extra starting watts and extended warranty tip the scales in the same direction. The Genmax is best suited for buyers who need something simple and affordable for light-duty tasks where long runtimes and robust after-sale support aren't top priorities.
If your priority is getting the lowest possible price on a functional inverter generator for light, occasional use, the Genmax GM2200i is a reasonable pick. It covers the basics and keeps things simple.
If you value quieter operation, longer runtime, stronger surge capacity, and a warranty that actually lasts, the Champion 201317 is the stronger overall package. It gives you more watts, more hours per tank, less noise, and three times the warranty coverage, all while weighing about two pounds less.
For most buyers, the Champion represents the better long-term investment. But if budget is the deciding factor and your power needs are modest, the Genmax still earns its place as a capable entry-level option.
Last updated July 13, 2026


| Specification | Genmax GM2200i | Champion Power Equipment 201317 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | No | No |
| Running watts | 1800 W | Winner: Winner: 1850 W |
| Starting watts | 2200 W | Winner: Winner: 2500 W |
| Noise (lower limit) | 58 dB | Winner: Winner: 53 dB |
| Weight | 41.9 lbs | Winner: Winner: 39.7 lbs |
| Run time @50% load | Winner: Winner: 6 h | Not available |
| Run time @25% load | 8 h | 11.5 h |
| Fuel tank | 1 gal | 1.05 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 18.9 x 11.4 x 17.3 | 17.6 x 12.6 x 18.1 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 5 | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | <3% % |
| Engine | ||
| Engine | 79.7 cc Dinking OHV 4-stroke | 80 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 1 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 1800 W | 1850 W |
| Starting watts | 2200 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 | 6 h | Not available |
| Run time @25% load | 8 h | 11.5 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | EPA, ANSI/PGMA G300-2023 | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | Floating |
| UPC | 738349925141 | 817198027173 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 1800 | 1850 |
| Starting Watts (Gasoline) | 2200 | 2500 |
| Runtime @ 50% Load (Gasoline) | 6 | Not available |
| Runtime @ 25% Load (Gasoline) | 8 | 11.5 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) | 1x Duplex 120V 20A (5-20R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Dinking OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 79.7 | 80 |
| Engine Oil Type | 10W-30 | 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 8 | 11.5 |
| Runtime @ 50% Load (Gasoline) | 6 | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Included Accessories | Funnel and tool kit | Oil, funnel, and tool kit |
| Additional specs | ||
| Summary | The GENMAX GM2200i is a 2200-watt gasoline inverter generator featuring a 79.7cc engine, CO detection, and parallel capability, designed for quiet and efficient power supply. | The Champion Power Equipment 201317 is a 2500-watt portable inverter generator featuring CO Shield® carbon monoxide auto shutoff system, designed for camping, tailgating, and backup power for essentials. |