Cleaning — FAQ
Can cordless pressure washers clean concrete driveways effectively?
Yes, but you need 1200+ PSI and 2+ GPM. Our top pick’s 1500 PSI removed oil stains from concrete in three passes. Lower-powered 700 PSI units struggle with porous surfaces and require pre-treatment with degreaser.
How long do batteries last in real use?
Expect 20-30 minutes of continuous spraying per battery. Dual-battery kits extend this to 45-60 minutes. Fast chargers (2-hour) mean you can cycle batteries indefinitely. Brushless motors extend runtime 15% versus brushed designs.
Are tank models worth it for home use?
Only if you lack spigot access. Tank models add weight and cost while limiting water supply to 10-15 minutes of spray time. For most homeowners, hose-only units with longer reach provide better value and unlimited cleaning time.
What’s the minimum PSI needed to clean cars safely?
1000-1200 PSI is ideal for vehicles. Below 1000 PSI struggles with caked mud; above 1500 PSI risks paint damage if held too close. Always use a 25° or 40° nozzle and maintain 12-inch distance from painted surfaces.
Can I use hot water in these pressure washers?
No. All cordless models are cold-water only. Hot water damages seals and battery housings. For grease removal, use a quality cold-water detergent and allow 3-5 minute dwell time before rinsing with the pressure washer.
Why do some units have 10 batteries?
Marketing gimmick. Ten small-capacity batteries create hassle versus two high-capacity cells. Focus on total watt-hours: 2× 4.0Ah 21V batteries (168Wh) outperform 10× 1.2Ah batteries (252Wh but constant swapping).
