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Sun Joe SPX3000 vs Kärcher K4 - The Differences

Further down the page, you'll find some explanations regarding the key similarities and differences between the Kärcher K4 and the Sun Joe SPX3000.

But before checking out explanations regarding their power, design, and features here's a table that summarizes the main pros of each of these 2 pressure washers:

Kärcher K4Sun Joe SPX3000
Kärcher K4Sun Joe SPX3000
  • Induction motor
  • Longer pressure hose
  • Higher PSI
  • Higher GPM
  • Higher Cleaning Units
  • Lighter
  • Dual soap tank system
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As the Sun Joe SPX3000 and the Kärcher K4 have different manufacturers, their overall build and technology in use can vary.

Power Comparison

  • Fuel: Both units are electric pressure washers.
  • Engine & Pump: The Kärcher K4 and the Sun Joe SPX3000 both use an axial-type pump to put water under pressure. The former's pump is manufactured by N-COR. Two main factors differentiate the motors used in these 2 units. To start with, the Kärcher K4's pump is powered by a 13-amp motor, while the Sun Joe SPX3000 uses a 14.5-amp one. But it should also be noted that, while the former is a standard, universal motor, the latter is an induction motor and thus, more energy-efficient, quiet and durable.

The following charts are provided to show you at a glance how the main specs of the Karcher K4 compare to the Sun Joe SPX3000.

  • Pressure: With a maximum reachable pressure of 2030 PSI, the Sun Joe SPX3000 provides a somewhat higher force to blast off dirt and grime than the 1900 PSI of the Kärcher K4.
  • Water Flow: When operating at low pressure, the Sun Joe SPX3000 can generate a much higher maximum volume of water than the Kärcher K4. It can deliver up to 1.76 GPM (gallons per minute), whereas the Kärcher K4 offers a maximum water flow of 1.5 GPM. The former should thus allow you to rinse away dirt and debris with significantly better efficiency and speed.
  • Cleaning Power: With its 3572.8 C.U. (Cleaning Units = PSI x GPM), the Sun Joe SPX3000 offers a much higher overall cleaning efficiency than the Kärcher K4 and its 2850 C.U.

Design Comparison

  • Design: With their compact design, both units are constructed with a strong focus on portability in mind.
  • Weight: At 23.4 lbs, the SPX3000 is somewhat lighter than the 26.5 lbs of the K4.
  • Maneuverability: Both products benefit from a set of wheels, which greatly contributes to their maneuverability. Both offer a handle, which improves your grip when you wish to move them.

Feature Comparison

  • Soap Addition: Both washers allow for the addition of chemical detergent solutions to the water. For that, the Sun Joe SPX3000 has an advantage over the Kärcher K4. The latter offers a single soap tank, whereas the former benefits from a dual soap tank system that lets you easily store and use 2 different cleaning solutions.
  • Trigger Gun & Wand: While each of these 2 units comes with a fairly standard ergonomic trigger gun, the Kärcher K4 sports a VPS wand, while the Sun Joe SPX3000 has a classic one.
  • Nozzles: The Kärcher K4 doesn't come with any nozzles (its aforementioned wand removes the need for any), but the Sun Joe SPX3000 is supplied with five (0°, 15°, 25°, 40°, and a soap nozzle).
  • Reach: With its included 25 ft high-pressure hose, the Kärcher K4 will allow you, out of the box, to move farther away from the unit than the Sun Joe SPX3000 and its 20 ft high pressure hose. As both units feature a 35 ft power cord, their maximum allowable placement from an electrical outlet is the same.
  • Storage: The K4 and SPX3000 both offer onboard storage that allows you to neatly keep the accessories you need at hand. Both washers feature a set of hooks to help you neatly store their high pressure hoses when not in use.
  • Accessories: In addition to the usual set of included accessories, the Kärcher K4 also comes with dirt blaster and detergent tank.

TL;DR

Kärcher K4Sun Joe SPX3000
Kärcher K4Sun Joe SPX3000
  • Induction motor
  • Longer pressure hose
  • Higher PSI
  • Higher GPM
  • Higher Cleaning Units
  • Lighter
  • Dual soap tank system
Show all offers
Show all offers
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