Champion 26kW fleX
#1 in Over 22 kWFull review
For larger homes that want 26 kW in a rust-proof aluminum housing with the longest warranty in its class.
AP Electric $7,499$7,499
The Champion 26kW fleX is the better standby generator overall, rated 3.8 to 3.3. The Champion 26kW fleX leads on warranty and value. The Briggs & Stratton PowerProtect+ 26kW wins on noise. The Champion 26kW fleX costs $570 less ($7,499 vs $8,069).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Briggs & Stratton PowerProtect+ 26kW
#2 in Over 22 kWFull review
For larger homes that want the most output and the longest full service warranty among the big brands.
Norwall $8,069 Signature Solar $8,069$8,069
Which should you buy?
- Choose the Champion 26kW fleX for warranty (10-year warranty vs 7-year warranty) and value ($288 per kW ($7,499 with transfer switch, 26 kW on propane) vs $310 per kW ($8,069 with transfer switch, 26 kW on propane)).
- Choose the Briggs & Stratton PowerProtect+ 26kW for noise (67 dBA rated in normal operation vs 68 dBA rated in normal operation).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 22 kw standby generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Champion 26kW fleX | Briggs & Stratton PowerProtect+ 26kW |
|---|---|---|
| Overall rating | 3.8/5 | 3.3/5 |
| Value 35% | 32 $288 per kW ($7,499 with transfer switch, 26 kW on propane) | 20 $310 per kW ($8,069 with transfer switch, 26 kW on propane) |
| Transfer switch 15% | 100 includes a 200 A transfer switch | 100 includes a 200 A transfer switch |
| Noise 15% | 33 68 dBA rated in normal operation | 42 67 dBA rated in normal operation |
| Power quality 10% | 83 under 5% THD | 83 under 5% THD |
| Warranty 25% | 100 10-year warranty | 57 7-year warranty |
Specifications
| Champion 26kW fleX | Briggs & Stratton PowerProtect+ 26kW | |
|---|---|---|
| Output | ||
| Rated output, propane | 26 kW | 26 kW |
| Rated output, natural gas | 23.4 kW | 24 kW |
| THD | Under 5% | Under 5% |
| Engine | 999 cc | 993 cc |
| Engine speed | 3,600 rpm | 3,600 rpm |
| Install | ||
| Transfer switch | Included, 200 A | Included, 200 A |
| Load management | No | No |
| Remote monitoring | No | Yes |
| Enclosure | Aluminum | Aluminum |
| Dimensions | 57.4 x 29.5 x 43.9 in | 46 x 27 x 28 in |
| Weight | 642.7 lb | 545 lb |
| Noise and warranty | ||
| Noise, normal operation | 68 dBA | 67 dBA |
| Noise, weekly self-test | - | 62 dBA |
| Warranty | 10 years | 7 years |
| Released | - | 2026-05 |