Karcher K 3000 E
#3 in ElectricFull review
Karcher’s most powerful plug-in washer, for homeowners who want near gas cleaning on driveways and decks. It costs as much as many gas washers.
Amazon $449.98$449.98
The Karcher K 3000 E rates 3.5 among electric pressure washers; the Simpson Clean Machine 2900 PSI rates 3.0 among gas ones. The Simpson Clean Machine 2900 PSI costs $171.24 less ($278.74 vs $449.98).
Simpson Clean Machine 2900 PSI
#15 in GasFull review
A cheap, light gas washer for occasional deck and patio cleaning. Buyers who wash a lot of concrete will want more flow and a longer warranty.
Amazon $278.74$278.74
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different power source classes (electric and gas), and each is scored against the reference points for its own class, so a rating says how well each does among its own power source peers. How we rank explains each factor.
| Factor weight | Karcher K 3000 E | Simpson Clean Machine 2900 PSI |
|---|---|---|
| Overall rating | 3.5/5 | 3.0/5 |
| Value 35% | 13 $136.36 per 1,000 cleaning units ($449.98, 3,300) | 86 $40.05 per 1,000 cleaning units ($278.74, 6,960) |
| Cleaning power 30% | 100 3,300 cleaning units (3,000 PSI x 1.1 GPM) | 33 6,960 cleaning units (2,900 PSI x 2.4 GPM) |
| Hose 10% | 100 35 ft hose | 33 25 ft hose |
| Warranty 25% | 50 warranty not published (neutral score used) | 0 1-year warranty |
Specifications
| Karcher K 3000 E | Simpson Clean Machine 2900 PSI | |
|---|---|---|
| Cleaning | ||
| Pressure | 3,000 PSI | 2,900 PSI |
| Flow | 1.1 GPM | 2.4 GPM |
| Cleaning units | 3,300 | 6,960 |
| Nozzles included | 5 | 4 |
| Detergent | Onboard tank | Siphon tube |
| Power | ||
| Power | Electric | Gas |
| Engine or motor | 15 A, brushless | 170 cc (Simpson CT170) |
| Pump | - | Axial cam |
| CARB compliant | - | No |
| Build | ||
| Hose | 35 ft | 25 ft |
| Power cord | 35 ft | - |
| Weight | - | 50 lb |
| Warranty | - | 1 year |