When you start shopping for a pressure washer, the first fork in the road is petrol or electric. It is easy to assume petrol is simply the more serious, more powerful choice and electric is the budget option, but that is not how it works in practice. The two suit different jobs, and picking the wrong type for your work means either paying for power you never use or being left short on the day you need it.
This guide lays out what each type does best, what they cost to own, and how to decide, so you buy the machine that fits the way you actually work.
Buy an electric pressure washer if you usually have a socket nearby, which covers most home and light trade jobs: patios, cars, decking, render and van wash downs. Buy a petrol pressure washer if you regularly work away from mains power or need sustained high pressure over large areas, such as on farms, sites and big outdoor jobs. If you want to skip straight to specific machines, our guide to the best pressure washers in the UK compares six models across both types.
An electric machine wins on convenience and cost. It is lighter to carry and store, quieter to run, cheaper to buy and needs almost no maintenance beyond looking after the hose and lance. Plug it in and it starts every time, with no fuel to mix, no pull cord and no engine to service. For the vast majority of cleaning jobs around a home or a job with power on tap, that is exactly what you want.
The power is more than enough too. A good mains machine has the pressure and flow to lift patio grime, green algae and road dirt without fuss, and the better models take the same patio cleaner heads and accessories that make big jobs quick. Unless you are genuinely working off grid or cleaning at industrial scale, electric covers the work.
A petrol machine earns its place on power and independence. With no cable to worry about, it goes wherever the work is, which makes it the tool for farms, building sites, large yards and any job far from a socket. Petrol engines also tend to drive higher, more sustained pressure than domestic mains units, so for stripping render across a whole building or cleaning heavy plant, they keep going where a smaller electric machine would struggle.
That capability is specialist rather than universal. If your work does not take you away from power or demand that level of sustained pressure, the extra grunt largely sits unused while you carry the weight, noise and running costs that come with it.
This is where the everyday difference shows. An electric washer costs little to run and needs next to no upkeep, and it is quiet enough to use without annoying the neighbours or wearing ear defenders. A petrol machine costs more up front, burns fuel every time you use it, needs routine engine maintenance such as oil changes, and is loud. None of that rules petrol out, but it does mean you should only take it on if the job genuinely calls for it, because you pay for those engines in money, noise and effort long after the purchase.
For most homeowners and tradespeople, a strong mains electric pressure washer is the right buy, ideally one with a healthy flow rate and a patio cleaner head for the big jobs. Reserve petrol for genuine off grid work and large scale cleaning, and if you find you need both, many trades keep an electric machine for the everyday and a petrol one for the jobs that demand it. Decide by where you work and what you clean, not by the assumption that petrol always means better.
The right kit gets the job done. A sharp quote wins it in the first place. QuoteSmith helps UK tradespeople build and send professional quotes and proposals in minutes. See how it works.
Try QuoteSmithFor most people an electric pressure washer is better: it is cheaper, lighter, quieter and needs almost no maintenance, and it has plenty of power for patios, cars, decking and general cleaning. A petrol pressure washer is better only when you work away from mains power or need sustained high pressure over large areas, such as on farms, building sites and big outdoor jobs. Match the machine to where and how you work rather than assuming petrol means better.
No, most home and light trade jobs are handled comfortably by a mains electric machine, and a socket is usually within reach. You only need petrol when there is no power available or when the job demands the higher, more sustained pressure that petrol engines provide. If you rarely work off grid, an electric washer will serve you better day to day.
Generally yes. Petrol engines tend to drive higher pressure and flow than domestic mains machines, which is why they suit heavy commercial and agricultural cleaning. The catch is that this power comes with more noise, more weight, fuel costs and engine maintenance. For everyday patio and vehicle cleaning that extra power is rarely needed, so the practical winner for most buyers is a good electric machine.
An electric pressure washer costs very little to run beyond the water and the modest electricity it draws, and it needs almost no upkeep. A petrol machine adds the ongoing cost of fuel plus routine engine maintenance such as oil changes, and it is louder to run. Over a year of regular use the electric machine is clearly cheaper and simpler to own for most people.
It depends on the work. A tradesperson who cleans down at properties with power, washes a van and clears patios is well served by a strong mains electric machine, ideally one with a good flow rate and a patio cleaner head. A groundworker, farmer or anyone regularly cleaning on sites without power will get more from a petrol machine. Many trades own an electric washer and only reach for petrol on the jobs that truly need it.
More UK tool and home buying guides from QuoteSmith.