Cummins QuietConnect RS25 25kW Liquid-Cooled vs Kohler 26RCA 26kW
The Kohler 26RCA 26kW is the more powerful unit: 26,000 running watts against 25,000 — about 4% more capacity for the Kohler 26RCA 26kW. The Cummins QuietConnect RS25 25kW Liquid-Cooled is the quieter of the two (64 dBA vs 67 dBA — though manufacturers measure noise at different loads and distances). Warranty favors the Kohler 26RCA 26kW: 5 years vs 2.
| Cummins QuietConnect RS25 25kW Liquid-Cooled | Kohler 26RCA 26kW | |
|---|---|---|
| Price (MSRP) | — | $7,445 |
| Type | home-standby | home-standby |
| Fuel | natural-gas, propane | natural-gas, propane |
| Running watts (gas / LP for standby) | 25000 W | 26000 W |
| Running watts (propane) | 25000 W | 26000 W |
| Running watts (natural gas) | 25000 W | 24000 W |
| Noise level | 64 dBA | 67 dBA |
| Output voltage | 120/240V | 120/240V |
| Automatic transfer switch included | No | No |
| Main-line circuit breaker | 125 A | — |
| Start type | automatic | automatic |
| Engine | — | Kohler CH1006 |
| Engine displacement | 2400 cc | 999 cc |
| NG use at half load | 185.7 ft³/h | 180 ft³/h |
| Propane use at half load | 2.1 gal/h | 2.34 gal/h |
| Weight | 1109 lb | 625 lb |
| Warranty | 2 yr | 5 yr |
Frequently asked questions
Which is more powerful, the Cummins QuietConnect RS25 25kW Liquid-Cooled or the Kohler 26RCA 26kW?
The Kohler 26RCA 26kW, at 26,000 running watts on its best fuel versus 25,000 W. Remember that dual-fuel and natural-gas ratings are lower than gasoline ratings — the comparison table shows the published per-fuel figures.
Which costs less to run, the Cummins QuietConnect RS25 25kW Liquid-Cooled or the Kohler 26RCA 26kW?
Estimated fuel for 24 hours at about 50% load: $67 on natural gas for the Cummins QuietConnect RS25 25kW Liquid-Cooled vs $65 on natural gas for the Kohler 26RCA 26kW, at national average prices. These are spec-sheet-derived estimates — the assumptions are on the methodology page, and different fuels make this a cost comparison, not an efficiency ranking.
Where do these specifications come from?
Every record on BackupAtlas is hand-curated from manufacturer documentation and spec sheets, and each generator page links to its source document.