Cleaning — FAQ
Are cordless pressure washers powerful enough for tough jobs?
Modern brushless models delivering 1400-1500PSI and 2.0+ GPM handle most residential tasks effectively. They clean cars, patios, decks, and driveways comparably to light-duty corded units, though gas pressure washers remain superior for heavy commercial grime.
How long do batteries last in cordless pressure washers?
Expect 20-30 minutes of continuous trigger time per 4.0Ah battery. Most kits include two batteries, providing nearly an hour of work. Intermittent use (typical for detailing) extends total job time to 90+ minutes.
Can I use hot water in a cordless pressure washer?
No. All cordless models are cold-water only. Using hot water above 104°F (40°C) damages seals and voids warranties. For greasy stains, use a soap nozzle with cold water and a dedicated degreaser detergent instead.
What’s the difference between PSI and GPM?
PSI (pounds per square inch) measures pressure or cleaning force. GPM (gallons per minute) measures water volume or cleaning speed. Higher GPM cleans faster; higher PSI cleans deeper. Optimal performance requires balancing both metrics.
Are cordless pressure washers safe for car paint?
Yes, when using 25° or 40° nozzles at 1200-1500PSI. Hold the wand 12+ inches from the surface. Avoid 0° nozzles—they can strip paint. Always test on an inconspicuous area first and use the lowest effective pressure.
Can I draw water from a bucket or lake?
Most cordless models support self-priming from standing water sources. Use a filter to prevent debris intake. Suction height is limited to 3-5 feet, so place the unit close to your water source. Gravity-fed systems work best.
