The GENMAX GM8000iETC is the better inverter generator overall, rated 3.8 to 3.3. The GENMAX GM8000iETC leads on value and fuel options. The Honda EU7000iS wins on run time. The GENMAX GM8000iETC costs $3,399.01 less ($1,499.99 vs $4,899).
A mid-priced tri-fuel inverter for home backup through a transfer switch, especially for houses with a natural gas line. Auto start, app control and CO shutoff are unusual at this price.
Amazon $1,499.99For homeowners who want a quiet, fuel-injected 240V Honda for backup power and will pay a large premium for it. Cheaper dual-fuel inverters offer more watts for the money.
Amazon $4,899 Amazon (50-state EU7000ISNAC) $4,999Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every large inverter generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | GENMAX GM8000iETC | Honda EU7000iS |
|---|---|---|
| Overall rating | 3.8/5 | 3.3/5 |
| Value 30% | 66 $0.25 per running watt | 0 $0.89 per running watt |
| Quiet 20% | 62 62 dBA at light load, maker rating | 100 52 dBA at light load, maker rating |
| Run time 15% | 29 10 hours on a tank at 25% load | 71 16 hours on a tank at 25% load |
| Fuel options 10% | 100 gasoline, propane or natural gas | 0 gasoline only |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 100 shuts off when carbon monoxide builds up |
| Warranty 10% | 50 3-year warranty | 50 3-year warranty |
| Starting 5% | 100 electric start with a remote fob or app | 100 electric start with a remote fob or app |
| GENMAX GM8000iETC | Honda EU7000iS | |
|---|---|---|
| Output | ||
| Gasoline | 6,000 W running, 8,000 W starting | 5,500 W running, 7,000 W starting |
| Propane | 5,500 W running, 7,250 W starting | - |
| Natural gas | 4,800 W running | - |
| Outlets | 2 × 120 V, L5-30, USB | 4 × 120 V, L5-30, L14-30 |
| Parallel capable | Yes | Yes |
| Total harmonic distortion | under 3% | - |
| Price per watt | $0.25 | $0.89 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline |
| Tank | 3.6 gal | 5.1 gal |
| Run time (gasoline) | 10 hr at 25% load | 16 hr at 25% load |
| Engine | 312 cc | 389 cc |
| Noise and safety | ||
| Rated noise (light load) | 62 dBA | 52 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | - | Yes |
| Build | ||
| Starting | Remote, electric and recoil | Remote, electric and recoil |
| App | Yes | Yes |
| Wheels | Yes | Yes |
| Dimensions | 24.0 x 18.5 x 21.1 in | 33.4 x 27.6 x 28.4 in |
| Weight | 144.6 lb | 263.2 lb |
| Warranty | 3 years | 3 years |
