FIRMAN T09275
#18 in LargeFull review
A large tri-fuel generator for homes with a natural gas line that want transfer-switch backup without storing fuel, at a premium price.
Amazon $1,707.66$1,707.66
The FIRMAN T09275 is the better portable generator overall, rated 4.0 to 3.0. The FIRMAN T09275 leads on fuel options, value and run time. The FIRMAN T09275 costs $4,291.34 less ($1,707.66 vs $5,999).
Honda EB10000
#25 in LargeFull review
A commercial generator for contractors and rental fleets who run it every day and need it to last. For home backup, consumer tri-fuel models deliver the same power for a fraction of the price.
Amazon $5,999$5,999
Prices were last checked October 28, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the FIRMAN T09275 for fuel options (gasoline, propane or natural gas vs gasoline only), value ($0.19 per running watt vs $0.67 per running watt) and run time (11 hours on a tank at 50% load vs 7.9 hours on a tank at 50% load).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large portable generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | FIRMAN T09275 | Honda EB10000 |
|---|---|---|
| Overall rating | 4.0/5 | 3.0/5 |
| Value 30% | 38 $0.19 per running watt | 0 $0.67 per running watt |
| Run time 15% | 70 11 hours on a tank at 50% load | 39 7.9 hours on a tank at 50% load |
| Fuel options 15% | 100 gasoline, propane or natural gas | 0 gasoline only |
| Home hookup 15% | 100 240 V outlet for a transfer switch | 100 240 V outlet for a transfer switch |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 100 shuts off when carbon monoxide builds up |
| Warranty 10% | 67 3-year warranty | 67 3-year warranty |
| Starting 5% | 80 push-button electric start | 80 push-button electric start |
Specifications
| FIRMAN T09275 | Honda EB10000 | |
|---|---|---|
| Output | ||
| Gasoline | 9,200 W running, 11,400 W starting | 9,000 W running, 10,000 W starting |
| Propane | 8,300 W running, 10,400 W starting | - |
| Natural gas | 6,900 W running, 8,650 W starting | - |
| Outlets | 2 × 120 V, L5-30, L14-30, 14-50 | 4 × 120 V, L5-30, L14-30, L14-50 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Price per watt | $0.19 | $0.67 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline |
| Tank | 9 gal | 8.2 gal |
| Run time (gasoline) | 11 hr at 50% load | 7.9 hr at 50% load |
| Engine | 459 cc | 688 cc |
| Noise and safety | ||
| Rated noise | 76 dBA | 71 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | - | No |
| Build | ||
| Starting | Electric and recoil | Electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 31 x 29.4 x 27 in | 41 x 27.7 x 35.1 in |
| Weight | 217.5 lb | 403 lb |
| Warranty | 3 years | 3 years |
| Released | 2022-09 | 2012-01 |