Take a look at the chart below to quickly see the differences:
Cost - Electric washers may be less expensive initially, but that's because they are designed to be lightweight and aimed at the occasional user. When you invest in a gas pressure washer, you get professional results with more cleaning power, high quality (replaceable) parts, and a significantly longer life.
Durability - By putting a high demand on an electric unit, you'll quickly see the hidden costs — making you and your wallet work harder over time. A gas-powered pressure washer is a much more versatile and substantial machine.
Gasoline models employ specially engineered metal pumps and components that are interchangeable and replaceable, making maintenance easy. With proper care, you can expect your gas-powered investment to last for years and years.
Electricity and Water Don't Mix - Gas units can be used virtually anywhere outdoors without pesky extension cords getting in your way. Being cordless avoids the risk of electric shock, and lets you work without being limited by the distance from your nearest plug.
Attachments - Gas machines have an arsenal of accessories available to tackle a variety of jobs. Surface cleaners and more cleaning tips make easy work out of grimy, large driveways. Durable longer wands will make cleaning your second story a breeze. With longer hoses available too, no corner of your yard will be out of reach. There’s a tool for every job using a gas unit!
Power - Electric units just can't muster the strength and results that a gas machine can. Getting the right power washer saves you both time and frustration.
Gas-powered washers can operate at a much higher PSI, which is essential when you need to clean stubborn stains on surfaces like a driveway or sidewalk. PSI can be the difference between "rinsing" and "washing" your surfaces.
After making the switch, the only question you'll have is why you didn't get one sooner.
Pressure Washer Considerations
Cleaning Units - CU measurements provide an estimate of the efficiency and performance of the washer. You can calculate CU by multiplying PSI x GPM. More cleaning units mean higher power, broader spread, and a faster clean.
Pounds per Square Inch - PSI is the measure of pressure that a compressor can produce (in pounds) per square inch of space.
Gallons Per Minute - GPM measures the volume of water your washer is pumping every minute, also known as a flow rate. GPM is one of the most important metrics you need to know when buying a pressure washer.
PSI won't matter much for cleaning if your water source's GPM is too low to supply enough water to your washer. The average household will handle 2.5 GPM without problems. Make sure your water supply can handle the listed flow rate of your pressure washer or risk damaging the motor.
Pro Tip:You can determine your GPM by how fast you can fill up a 5-gallon bucket. 5 / Time (seconds) X 60 = GPM
The Bottom Line
Electric pressure washers are fine for light, occasional use around the home. But, if you want to take on the toughest grime with ease, do yourself a favor and invest in a gas-powered pressure washer.