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Three Westinghouse generators, chosen for mobile detailers and detailing vans. Not the full Westinghouse range, just the part of it we would put in a working van. Each one has an RCD safety switch and IP66 weatherproof outlets fitted at the factory, and produces pure sine wave power.
All three are listed below with current pricing. This is the difference between them.
One machine at a time
One machine, large reserve
Washer and compressor together
The short version: the iGen4750PRO and iGen7500PRO each run one machine at a time. The iGen10000PRO is the only one we rate for a pressure washer and an air compressor running together. If two machines at once is how your van works, that is the one.
Because power at a customer's place is somebody else's problem until it becomes yours.
| Model | Starting power | Running power | Start type | Runtime | Best for |
|---|---|---|---|---|---|
| iGen4750PRO | 4,750 W | 3,800 W | Electric, wireless remote, recoil backup | 14 h at 1/4 load4.2 h at full load, 12 L tank | Solo operator, one machine at a time. 36 kg dry, the only one here a single person can load without a ramp |
| iGen7500PRO | 7,500 W | 6,000 W | Electric, wireless remote, recoil backup | 14.6 h at 1/4 load4.6 h at full load, 15 L tank | One machine, never worked hard. Two 15 amp outlets and reserve to start a larger pressure washer |
| iGen10000PRO | 10,000 W | 8,200 W | Electric, wireless remote, recoil backup | 19.8 h at 1/4 load7.3 h at full load, 30 L tank | Two machines together, or a two person crew. 85 kg dry, so it stays mounted in the van |
All three are digital inverter generators with pure sine wave output, an RCD safety switch and IP66 rated outlets. Figures are from the Westinghouse spec sheet for each model.
Suits a solo detailer running one machine at a time, which describes most mobile operations. A single 15 amp outlet makes it genuinely a one machine unit: you cannot run a washer and a vacuum together on it regardless of wattage.
Its advantage is weight. At 36 kg dry with wheels and an extendable handle, it is the only one of the three a single person can load without a ramp. Choose it if the generator comes out of the van at every job.
Also rated for one machine at a time, but with 25 amps behind it instead of 15.8. A 15 amp pressure washer uses well under half its capacity, so the engine never works hard, which means less noise, less fuel and less wear. A second 15 amp outlet, via the adaptor supplied in the box, takes lights and chargers.
Its advantage is headroom. Choose it over the iGen4750PRO for a larger pressure washer, a bigger tank, or simply to avoid a generator sitting near its limit all day. At 60 kg dry it is a two person lift.
The only model here we rate for two machines at once, which in practice means a pressure washer and an air compressor, or two operators on opposite ends of a car. It has enough spare capacity to absorb a second motor starting while the first is already running, which is the moment a smaller generator trips.
Its advantage is reserve, plus a 30 litre tank that covers a full day without refuelling. At 85 kg dry it lives in the van permanently, so check your payload before fitting it.
The continuous power a machine draws once it is up and running, and the figure to add together for everything operating at the same time. That total needs to sit comfortably below the generator's running watts, not level with it.
The extra power an electric motor needs for the moment it starts, which is considerably more than it uses afterwards. A generator sized only on running watts will trip the first time a motor kicks in, which is why both figures are published.
Add the running watts of everything operating together, then add a starting allowance for the largest motor in that group. A common rule is around two and a half times a motor's rating, and closer to three times for an air compressor that starts against tank pressure. Where a manufacturer publishes a starting requirement, use their figure instead.
Worth knowing: a socket carries its rated current no matter how big the generator behind it is, so check outlet count as well as wattage. A 10 amp plug fits a 15 amp socket, so most detailing equipment connects without an adaptor.
This is the load that decides the generator for most detailers. A pressure washer is usually the largest motor in the van and the one that restarts most often: a total stop machine shuts down when you release the trigger and restarts when you pull it, so the surge happens every single time rather than once at the start of the job.
An air compressor is the other one to watch, because it cuts in on its own pressure switch whenever tank pressure drops. It can start without warning while the washer is already running, and that combination is exactly what separates the iGen10000PRO from the two smaller models.
| Check | Why it matters |
|---|---|
| The machine's running wattage | Or its plug rating, if the wattage is not published |
| Its starting requirement | This is the figure that actually sizes the generator, not the running one |
| The generator's starting watts | Running watts alone will not tell you whether the motor will start |
| Anything else connected | Every other load reduces what is left available for the surge |
We sell both sides of this equation, so we can check them together rather than guessing. Browse our pressure washers, the Kranzle range or our Chicago Pneumatic air compressors, and tell us what you have. We will not confirm a particular generator runs a particular machine without looking at both sets of figures.
It depends on what runs at the same time, not on what you own. Most solo detailers use one machine at a time, so the requirement is set by the largest single item, usually the pressure washer, plus its starting surge. If a second machine runs alongside it, the requirement roughly doubles. Send us your equipment list and we will size it properly.
For a solo operator running one machine at a time, the iGen4750PRO, mainly because at 36 kg it is the only one a single person can load without a ramp. If you want the same job done with the generator barely working, the iGen7500PRO. If a pressure washer and a compressor run together, the iGen10000PRO is the only one here we rate for it.
Yes, provided the generator has enough starting capacity for the washer's motor. The catch is that a total stop pressure washer restarts every time you pull the trigger, so the surge happens constantly rather than once. Check the washer's starting requirement against the generator's starting watts, not its running watts. Tell us which washer you have and we will check it.
Only on a generator sized for two machines, and only if it has two outlets to feed them. Of the three here, we rate the iGen10000PRO for two machines running together. The iGen4750PRO has a single 15 amp outlet, so it is one machine regardless of wattage. In practice a solo detailer rarely needs both at once, since you can only operate one at a time.
Running watts is the continuous power a machine draws once it is operating. Starting watts is the much larger, very short burst an electric motor needs to get turning. A vacuum or pressure washer might run happily on its rated power but demand several times that for the instant it starts, which is why sizing on running watts alone leads to a generator that trips.
List only the equipment that runs at the same time. Add up their running watts. Identify the largest motor in that group and add a starting allowance on top, commonly around two and a half times its rating. Then check the generator has enough outlets at the right rating to feed everything, since a 15 amp socket carries 15 amps whatever the generator behind it makes.
Weight and restraint first. These range from 36 kg to 85 kg dry, and more with oil and fuel, so check your payload. Decide whether it comes out at every job or stays mounted, because that changes which model suits. Petrol and fumes need thought too: a generator must be run outdoors in open air, never inside the van, and fuel carried in an approved container.
Usually, but it depends on the specific machines. All three produce pure sine wave power, so equipment with electronic controls is safe to run. What decides it is capacity: the running load of what operates together, plus the starting surge of the biggest motor. Send us your equipment list and we will tell you which model covers it.
Specifications are supplied by Westinghouse Outdoor Power Equipment and are subject to change without notice. Sizing guidance on this page is general and not a performance guarantee: actual results depend on your equipment, lead length and condition, ambient temperature, altitude and duty cycle. Petrol generators must be operated outdoors in open air, never inside a van, garage or any enclosed space. Always read the instruction manual supplied with your generator.
Tell us what you run and we will tell you which one you need.
Get a Recommendation Browse Pressure WashersThree Westinghouse generators, chosen for mobile detailers and detailing vans. Not the full Westinghouse range, just the part of it we would put in a working van. Each one has an RCD safety switch and IP66 weatherproof outlets fitted at the factory, and produces pure sine wave power.
All three are listed below with current pricing. This is the difference between them.
One machine at a time
One machine, large reserve
Washer and compressor together
The short version: the iGen4750PRO and iGen7500PRO each run one machine at a time. The iGen10000PRO is the only one we rate for a pressure washer and an air compressor running together. If two machines at once is how your van works, that is the one.
Because power at a customer's place is somebody else's problem until it becomes yours.
| Model | Starting power | Running power | Start type | Runtime | Best for |
|---|---|---|---|---|---|
| iGen4750PRO | 4,750 W | 3,800 W | Electric, wireless remote, recoil backup | 14 h at 1/4 load4.2 h at full load, 12 L tank | Solo operator, one machine at a time. 36 kg dry, the only one here a single person can load without a ramp |
| iGen7500PRO | 7,500 W | 6,000 W | Electric, wireless remote, recoil backup | 14.6 h at 1/4 load4.6 h at full load, 15 L tank | One machine, never worked hard. Two 15 amp outlets and reserve to start a larger pressure washer |
| iGen10000PRO | 10,000 W | 8,200 W | Electric, wireless remote, recoil backup | 19.8 h at 1/4 load7.3 h at full load, 30 L tank | Two machines together, or a two person crew. 85 kg dry, so it stays mounted in the van |
All three are digital inverter generators with pure sine wave output, an RCD safety switch and IP66 rated outlets. Figures are from the Westinghouse spec sheet for each model.
Suits a solo detailer running one machine at a time, which describes most mobile operations. A single 15 amp outlet makes it genuinely a one machine unit: you cannot run a washer and a vacuum together on it regardless of wattage.
Its advantage is weight. At 36 kg dry with wheels and an extendable handle, it is the only one of the three a single person can load without a ramp. Choose it if the generator comes out of the van at every job.
Also rated for one machine at a time, but with 25 amps behind it instead of 15.8. A 15 amp pressure washer uses well under half its capacity, so the engine never works hard, which means less noise, less fuel and less wear. A second 15 amp outlet, via the adaptor supplied in the box, takes lights and chargers.
Its advantage is headroom. Choose it over the iGen4750PRO for a larger pressure washer, a bigger tank, or simply to avoid a generator sitting near its limit all day. At 60 kg dry it is a two person lift.
The only model here we rate for two machines at once, which in practice means a pressure washer and an air compressor, or two operators on opposite ends of a car. It has enough spare capacity to absorb a second motor starting while the first is already running, which is the moment a smaller generator trips.
Its advantage is reserve, plus a 30 litre tank that covers a full day without refuelling. At 85 kg dry it lives in the van permanently, so check your payload before fitting it.
The continuous power a machine draws once it is up and running, and the figure to add together for everything operating at the same time. That total needs to sit comfortably below the generator's running watts, not level with it.
The extra power an electric motor needs for the moment it starts, which is considerably more than it uses afterwards. A generator sized only on running watts will trip the first time a motor kicks in, which is why both figures are published.
Add the running watts of everything operating together, then add a starting allowance for the largest motor in that group. A common rule is around two and a half times a motor's rating, and closer to three times for an air compressor that starts against tank pressure. Where a manufacturer publishes a starting requirement, use their figure instead.
Worth knowing: a socket carries its rated current no matter how big the generator behind it is, so check outlet count as well as wattage. A 10 amp plug fits a 15 amp socket, so most detailing equipment connects without an adaptor.
This is the load that decides the generator for most detailers. A pressure washer is usually the largest motor in the van and the one that restarts most often: a total stop machine shuts down when you release the trigger and restarts when you pull it, so the surge happens every single time rather than once at the start of the job.
An air compressor is the other one to watch, because it cuts in on its own pressure switch whenever tank pressure drops. It can start without warning while the washer is already running, and that combination is exactly what separates the iGen10000PRO from the two smaller models.
| Check | Why it matters |
|---|---|
| The machine's running wattage | Or its plug rating, if the wattage is not published |
| Its starting requirement | This is the figure that actually sizes the generator, not the running one |
| The generator's starting watts | Running watts alone will not tell you whether the motor will start |
| Anything else connected | Every other load reduces what is left available for the surge |
We sell both sides of this equation, so we can check them together rather than guessing. Browse our pressure washers, the Kranzle range or our Chicago Pneumatic air compressors, and tell us what you have. We will not confirm a particular generator runs a particular machine without looking at both sets of figures.
It depends on what runs at the same time, not on what you own. Most solo detailers use one machine at a time, so the requirement is set by the largest single item, usually the pressure washer, plus its starting surge. If a second machine runs alongside it, the requirement roughly doubles. Send us your equipment list and we will size it properly.
For a solo operator running one machine at a time, the iGen4750PRO, mainly because at 36 kg it is the only one a single person can load without a ramp. If you want the same job done with the generator barely working, the iGen7500PRO. If a pressure washer and a compressor run together, the iGen10000PRO is the only one here we rate for it.
Yes, provided the generator has enough starting capacity for the washer's motor. The catch is that a total stop pressure washer restarts every time you pull the trigger, so the surge happens constantly rather than once. Check the washer's starting requirement against the generator's starting watts, not its running watts. Tell us which washer you have and we will check it.
Only on a generator sized for two machines, and only if it has two outlets to feed them. Of the three here, we rate the iGen10000PRO for two machines running together. The iGen4750PRO has a single 15 amp outlet, so it is one machine regardless of wattage. In practice a solo detailer rarely needs both at once, since you can only operate one at a time.
Running watts is the continuous power a machine draws once it is operating. Starting watts is the much larger, very short burst an electric motor needs to get turning. A vacuum or pressure washer might run happily on its rated power but demand several times that for the instant it starts, which is why sizing on running watts alone leads to a generator that trips.
List only the equipment that runs at the same time. Add up their running watts. Identify the largest motor in that group and add a starting allowance on top, commonly around two and a half times its rating. Then check the generator has enough outlets at the right rating to feed everything, since a 15 amp socket carries 15 amps whatever the generator behind it makes.
Weight and restraint first. These range from 36 kg to 85 kg dry, and more with oil and fuel, so check your payload. Decide whether it comes out at every job or stays mounted, because that changes which model suits. Petrol and fumes need thought too: a generator must be run outdoors in open air, never inside the van, and fuel carried in an approved container.
Usually, but it depends on the specific machines. All three produce pure sine wave power, so equipment with electronic controls is safe to run. What decides it is capacity: the running load of what operates together, plus the starting surge of the biggest motor. Send us your equipment list and we will tell you which model covers it.
Specifications are supplied by Westinghouse Outdoor Power Equipment and are subject to change without notice. Sizing guidance on this page is general and not a performance guarantee: actual results depend on your equipment, lead length and condition, ambient temperature, altitude and duty cycle. Petrol generators must be operated outdoors in open air, never inside a van, garage or any enclosed space. Always read the instruction manual supplied with your generator.
Tell us what you run and we will tell you which one you need.
Get a Recommendation Browse Pressure Washers
