An 1800-watt electric pressure washer uses a powerful 1800W electric motor to pressurize water from a garden hose, producing roughly 1,800 to 2,150 PSI (pounds per square inch) at a flow rate of 1.2 to 2.0 GPM (gallons per minute). It acts as a versatile mid-range cleaning tool designed to blast away dirt, grime, moss, and stains much faster and using less water than a standard garden hose.