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Westinghouse has been an electrical name since 1886. The iGen PRO generators are the workplace models in the range, with an RCD safety switch and IP66 rated outlets fitted from the factory rather than bolted on later. A mobile detailing van is a workplace, which is why these are the ones we stock.
All three are listed below with current pricing. This is the difference between them.
One machine at a time
One machine, large reserve
Compressor and washer together
The short version: the iGen4750PRO and the iGen7500PRO each run one machine at a time. The iGen10000PRO is the only model in the range we rate for a compressor and a pressure washer running together. If two machines at once is how your van works, that is the one.
Whichever model you choose, the outlet is the same 240V 15 amp IP66 socket, behind the same RCD safety switch, and a 10 amp plug fits it. Your leads and your machines plug in identically across the range. The iGen7500PRO and iGen10000PRO also carry a 32 amp socket, and both come with a 32 to 15 amp adaptor in the box, which turns it into a second standard 15 amp outlet. Almost nobody in a detailing van has any reason to use the 32 amp socket directly, and you never need to buy a special lead.
So the outlets are not the thing that separates these three generators. Capacity is.
In Australia a machine is either a 10 amp or a 15 amp machine. There is nothing in between. So a 15 amp Kranzle running alongside a 10 amp compressor needs 25 amps of supply, which is the iGen7500PRO's entire rating with nothing left over.
Running current is not what decides it. Starting current is. Pressure washers and compressors use induction motors, and an induction motor pulls a large surge for the moment it starts, several times its running current. A total stop pressure washer restarts every single time you pull the trigger. A compressor cuts in on its own pressure switch whenever tank pressure drops, without asking you first. So those surges are not a one off at the start of the day, they happen constantly, and each one lands on a generator that is already carrying the other machine.
| Model | Continuous output | Left over with a 15 A and a 10 A machine | What we rate it for |
|---|---|---|---|
| iGen4750PRO | 3,800 W / 15.8 A | Will not carry 25 A at all | One machine at a time |
| iGen7500PRO | 6,000 W / 25 A | Nothing. 25 A is its full rating | One machine at a time, with large reserve |
| iGen10000PRO | 8,200 W / 34.2 A | 9.2 A, enough to absorb a motor starting | Compressor and pressure washer together |
That spare capacity on the iGen10000PRO is the whole argument. It is not that the 7500PRO is a weak generator, it is that a 15 amp machine and a 10 amp machine together account for every amp it makes, before a single motor has even started.
Generator marketing talks in watts. Australian equipment is sold in amps. Mixing the two is how people end up with a generator that trips out halfway through a job.
Not everything you own, only what runs together. A pressure washer and a compressor running at once is two machines. A pressure washer, then a blower afterwards, is one. If the answer is two, you are looking at the iGen10000PRO and the rest of this is confirmation.
Australian machines come as 10 amp or 15 amp. Add the ratings of whatever runs at the same time. Two 10 amp machines is 20 amps. A 15 amp machine and a 10 amp machine is 25 amps.
| Machine | Motor | Supply it needs |
|---|---|---|
| Kranzle KHD7/122TS | Slow running 1400 rpm | 10 amp |
| Kranzle KHD10/122TS | 10 L/min, 30 to 110 bar | 10 amp |
| Kranzle KHD10/122 TST | 1.8 kW | 15 amp |
| Kranzle K1152TST | 2.8 kW intake, 2.0 kW output | 15 amp |
| BigBoi WashR Tradie | 1800 W peak brushless induction | 10 amp |
| BigBoi WashR Flo V2 | 1600 W peak induction | 10 amp |
| BigBoi BlowR PRO+ MKII | Two 1600 W motors | 10 amp |
| Chicago Pneumatic Whisper 2-50 | 1.5 kW | 10 amp |
| Chicago Pneumatic CPRC 2.5-50 | 1.86 kW | 10 amp |
Because of starting surge, a generator sized so the numbers just fit is a generator that trips. For a single machine, any of the three models has plenty in hand. For two machines running together, only the iGen10000PRO has enough left over to absorb a motor starting on top of an existing load.
They are the same thing at 240 volts, since watts equals volts times amps. But you use them for two different jobs.
Work the sockets in amps. A 15 amp outlet carries 15 amps and no more, whatever the generator behind it is rated at. That limit has nothing to do with generator size, and it is why the iGen4750PRO with its single socket is a one machine unit.
Work the headroom in watts, and allow 2.5 times. An induction motor pulls far more than its rated power for the moment it starts. The accepted rule for sizing a generator is to allow two and a half times the motor's rating for that surge. A 1.8 kW pressure washer motor therefore needs around 4,500 watts available to start, not 1,800.
That is what the starting watts figure on a generator is for.
One exception worth knowing. An air compressor that starts against tank pressure, meaning it has no unloader valve or the valve has failed, is a much harder start than a pressure washer. Allow three times for those. On a 1.86 kW compressor that is 5,580 watts rather than 4,650, which puts it beyond the iGen4750PRO. If your compressor does not vent its head pressure when it stops, size on 3x.
| Model | Running watts | Starting watts | Largest motor it will start at 2.5x |
|---|---|---|---|
| iGen4750PRO | 3,800 W | 4,750 W | About 1.9 kW |
| iGen7500PRO | 6,000 W | 7,500 W | About 3.0 kW |
| iGen10000PRO | 8,200 W | 10,000 W | About 4.0 kW |
| Machine | Motor | Needed to start it | Smallest model that starts it |
|---|---|---|---|
| Chicago Pneumatic Whisper 2-50 | 1.5 kW | 3,750 W | iGen4750PRO, comfortably |
| BigBoi WashR Flo V2 | 1600 W peak | 4,000 W | iGen4750PRO, comfortably |
| Kranzle KHD10/122 TST | 1.8 kW | 4,500 W | iGen4750PRO, with little spare |
| BigBoi WashR Tradie | 1800 W peak | 4,500 W | iGen4750PRO, with little spare |
| Chicago Pneumatic CPRC 2.5-50 | 1.86 kW | 4,650 W, or 5,580 W at 3x | iGen4750PRO only if it starts unloaded, otherwise iGen7500PRO |
| Kranzle K1152TST | 2.8 kW intake | 7,000 W | iGen7500PRO. Too much for the iGen4750PRO |
Worth knowing before you buy: the Kranzle K1152TST is the one machine in our range the iGen4750PRO will not comfortably start. At 2.8 kW intake it needs around 7,000 watts on the 2.5 times rule, and the iGen4750PRO supplies 4,750. If that is your washer, start at the iGen7500PRO.
When a second machine starts while the first is already running, the generator has to supply the first machine's running load plus two and a half times the second machine's rating, at the same instant.
| 15 amp washer running, 10 amp compressor starting | Peak demand | Starting watts available | Spare |
|---|---|---|---|
| iGen4750PRO | 6,450 W | 4,750 W | Short by 1,700 W |
| iGen7500PRO | 6,450 W | 7,500 W | 1,050 W, and every amp of its socket capacity is used |
| iGen10000PRO | 6,450 W | 10,000 W | 3,550 W |
1,800 watts for the washer already running, plus 4,650 watts to start the compressor. On the iGen7500PRO that leaves about a thousand watts and no spare socket capacity at all, which is not enough margin to rely on when a total stop washer restarts on every trigger pull. On the iGen10000PRO it leaves three and a half thousand watts. That is why we rate the iGen10000PRO for two machines and the iGen7500PRO for one.
A 10 amp machine is the easiest kind of load for a generator to carry. It leaves more capacity in reserve for the surge each motor pulls when it starts, so the engine works less, the fuel lasts longer and nothing trips.
| Machine | Supply | Why it suits generator work |
|---|---|---|
| BigBoi WashR Tradie | 10 amp | BigBoi list it as compatible with generators and extension cords. 1800 W peak brushless induction motor, 1300 psi tuned, 8.8 L/min, and 19 kg, the lightest washer here. |
| BigBoi WashR Flo V2 | 10 amp | 1600 W peak induction motor, the smallest draw of any washer we stock. 2600 psi, 7 L/min max, 3 m power cable. |
| Kranzle KHD7/122TS | 10 amp | Slow running 1400 rpm motor and a 10 amp plug. German built, 26 kg, with a 5 year warranty on the unit and 10 years on the brass pump head. |
| Kranzle KHD10/122TS (10 amp model) | 10 amp | The most flow you can get from a 10 amp supply in the Kranzle range, at 10 L/min and 30 to 110 bar adjustable. |
| Kranzle KHD10/122 TST (15 amp model) | 15 amp | A 1.8 kW motor on a 15 amp supply. Still comfortable on any of the three generators as a single machine, it just uses more of the available capacity. |
| BigBoi BlowR PRO+ MKII | 10 amp | Two 1600 W motors on a 10 amp supply. Pairs with a washer on the iGen10000PRO, or runs on its own on any model. |
Simplest pairing: a 10 amp machine on the iGen4750PRO covers most mobile detailing, and the BigBoi WashR Tradie is the easiest of the lot on a generator. Step to the iGen7500PRO if you want that same machine barely loading the engine all day, and to the iGen10000PRO only when a compressor and a washer have to run together.
| Specification | iGen4750PRO | iGen7500PRO | iGen10000PRO |
|---|---|---|---|
| What we rate it for | One machine | One machine, large reserve | Compressor and washer together |
| Maximum starting power | 4,750 W | 7,500 W | 10,000 W |
| Continuous running power | 3,800 W | 6,000 W | 8,200 W |
| Continuous running current | 15.8 A | 25 A | 34.2 A |
| 15 amp outlets in practice | One | Two | Two |
| Receptacles on the panel | 1 x 15 A IP66 | 1 x 32 A IP66, 1 x 15 A IP66 | 1 x 32 A IP66, 1 x 15 A IP66 |
| 32 to 15 A adaptor supplied | Not applicable | Yes | Yes |
| 12V DC output | Not listed | Not listed | 12V, 8 A, 100 W, IP44 |
| RCD safety switch | Yes | Yes | Yes |
| Waveform | Pure sine wave, THD under 2.5% | Pure sine wave, THD under 2.5% | Pure sine wave, THD under 2.5% |
| Alternator | Brushless permanent magnet | Brushless permanent magnet | Brushless permanent magnet |
| Engine displacement | 190 cc | 298 cc | 457 cc |
| Maximum engine speed | 4,500 rpm | 4,000 rpm | 3,600 rpm |
| Fuel tank | 12 litres | 15 litres | 30 litres |
| Run time, 1/4 load | 14 hours | 14.6 hours | 19.8 hours |
| Run time, full load | 4.2 hours | 4.6 hours | 7.3 hours |
| Noise, 1/4 load at 7 m | 57 dB(A) | 57 dB(A) | 58 dB(A) |
| Noise, full load at 7 m | 67 dB(A) | 67 dB(A) | 68 dB(A) |
| Oil capacity | 600 mL | 650 mL | 1.1 litres |
| Starting | Electric, remote and recoil | Electric, remote and recoil | Electric, remote and recoil |
| Battery | 12V maintenance free | 12V maintenance free | 12V lithium-ion |
| Generator dimensions (mm) | 660 x 374 x 574 | 690 x 530 x 550 | 767 x 630 x 675 |
| Weight, dry | 36 kg | 60 kg | 85 kg |
| Weight, wet | 46 kg | 73 kg | 109 kg |
| Product code | WP iGen4750PRO | WP iGen7500PRO | WP iGen10000PRO |
| Warranty | 2 year domestic use | 2 year domestic use | 2 year domestic use |
A cheap open frame generator and one of these both make 240 volts. The difference is what that 240 volts looks like, what protects you from it, and what happens after a hundred jobs.
| Point of difference | Typical budget open frame unit | Westinghouse iGen PRO |
|---|---|---|
| Power quality | AVR regulated fixed speed alternator. Total harmonic distortion is frequently not published at all. | Digital inverter, pure sine wave, total harmonic distortion published at under 2.5%. |
| Alternator | Commonly brushed, with brushes as a wear item. | Brushless permanent magnet. No brushes to wear or replace. |
| Electrical safety | RCD protection often not fitted, left to the user to add with a lead. | RCD safety switch fitted to the panel on every PRO model, approved for workplace use. |
| Outlet protection | Ingress rating often unstated. | IP66 rated 240V outlets on all three models. |
| Engine speed | Fixed speed regardless of load. | Engine speed follows demand, with an ECO throttle switch. |
| Published data | Often headline watts and little else. | Noise at quarter and full load, run time at quarter and full load, dry and wet weight, continuous running current, THD, GTIN. |
| Fuel use over a day | Fixed speed burns similar fuel whether loaded or idling. | Up to 14 to 19.8 hours at quarter load depending on model. |
| Support | Often no local parts or service path. | Australian distributor with a parts and service network. |
That last row is worth more than it looks. A generator that cannot be serviced is a generator you replace, and a mobile detailer whose generator is out of action is not working that week. The specification transparency matters for the same reason: every figure on this page comes from the manufacturer's published spec sheet, including the unflattering ones like full load noise and wet weight.
Carbon monoxide: Petrol generators produce carbon monoxide, which has no smell and no colour. Run the generator outdoors in open air, well away from doors, windows and the vehicle you are working in. This is the single most important rule of operating one.
The iGen10000PRO. It is the only model in the range we rate for two machines. A 15 amp Kranzle at 11 amps and a 10 amp compressor is 21 amps against a 34.2 amp continuous rating, leaving 13 amps of headroom to absorb the surge when either motor starts. The iGen4750PRO and iGen7500PRO are one machine generators.
Because running current is not the whole load. Induction motors draw several times their running current for the moment they start, a total stop washer restarts on every trigger pull, and a compressor cuts in whenever tank pressure drops. At 21 amps of running load the iGen7500PRO has about four amps in hand, which is not enough to absorb that surge reliably.
The PRO models have an integrated RCD safety switch approved for workplace use, along with IP66 rated outlets. Standard iGen models do not. If the generator is being used for paid work, that is the range to be looking at.
No. The iGen7500PRO and iGen10000PRO come with a 32 to 15 amp adaptor in the box, so the 32 amp socket becomes a standard 15 amp outlet and everything plugs in with ordinary 15 amp plugs.
Yes. Every PRO model uses the same 240V 15 amp IP66 socket behind the same RCD safety switch, and a 10 amp plug fits a 15 amp socket. Your leads and machines work identically on any of them. What changes is how many outlets there are and how much capacity sits behind them.
Yes. The 15 amp KHD10/122 TST draws 11 amps from a 1.8 kW motor, so all three PRO models have the capacity for it as a single machine. What decides the model is whether anything else runs at the same time.
Reserve, run time and portability trade-offs. A 15 amp Kranzle uses under half the iGen7500PRO's capacity, so the engine never works hard, which means less noise, less fuel and less wear. You also get a bigger tank and a second 15 amp outlet for lights and chargers. The iGen4750PRO's advantage is that it is 24 kg lighter and $1,000 less.
57 to 58 dB(A) at quarter load and 67 to 68 dB(A) at full load, measured at 7 metres. Under a working pressure washer, expect something between those figures. They are inverter units with variable engine speed, so they are meaningfully quieter than a fixed speed open frame generator of the same output.
Not by connecting it to your switchboard yourself. These units are not suitable for connection to a fixed multiple earthed neutral installation and are designed for standalone plug and socket use. A licensed electrician and the correct changeover equipment are required for any connection to fixed wiring.
Unleaded petrol, 91, 95 or 98 RON. Ethanol blends such as E10 are not recommended by the manufacturer.
Yes, and for a purchase this size it is worth it. Send us the make and model of every machine you plan to run, and whether any of them run at the same time, and we will tell you which generator fits.
Generator specifications on this page are supplied by Westinghouse Outdoor Power Equipment and are subject to change without notice. Equipment supply figures are the published requirements for each machine. Suitability guidance is general and not a performance guarantee: actual results depend on your equipment, lead length and condition, ambient temperature, altitude and duty cycle. Comparisons with budget generators describe general characteristics of that category and are not directed at any particular brand or model. Always read the instruction manual and follow the safety instructions supplied with your generator.
Tell us what you run and we will tell you which one you need. Current pricing and stock are on the product listings below.
Get a Recommendation Browse Pressure WashersWestinghouse has been an electrical name since 1886. The iGen PRO generators are the workplace models in the range, with an RCD safety switch and IP66 rated outlets fitted from the factory rather than bolted on later. A mobile detailing van is a workplace, which is why these are the ones we stock.
All three are listed below with current pricing. This is the difference between them.
One machine at a time
One machine, large reserve
Compressor and washer together
The short version: the iGen4750PRO and the iGen7500PRO each run one machine at a time. The iGen10000PRO is the only model in the range we rate for a compressor and a pressure washer running together. If two machines at once is how your van works, that is the one.
Whichever model you choose, the outlet is the same 240V 15 amp IP66 socket, behind the same RCD safety switch, and a 10 amp plug fits it. Your leads and your machines plug in identically across the range. The iGen7500PRO and iGen10000PRO also carry a 32 amp socket, and both come with a 32 to 15 amp adaptor in the box, which turns it into a second standard 15 amp outlet. Almost nobody in a detailing van has any reason to use the 32 amp socket directly, and you never need to buy a special lead.
So the outlets are not the thing that separates these three generators. Capacity is.
In Australia a machine is either a 10 amp or a 15 amp machine. There is nothing in between. So a 15 amp Kranzle running alongside a 10 amp compressor needs 25 amps of supply, which is the iGen7500PRO's entire rating with nothing left over.
Running current is not what decides it. Starting current is. Pressure washers and compressors use induction motors, and an induction motor pulls a large surge for the moment it starts, several times its running current. A total stop pressure washer restarts every single time you pull the trigger. A compressor cuts in on its own pressure switch whenever tank pressure drops, without asking you first. So those surges are not a one off at the start of the day, they happen constantly, and each one lands on a generator that is already carrying the other machine.
| Model | Continuous output | Left over with a 15 A and a 10 A machine | What we rate it for |
|---|---|---|---|
| iGen4750PRO | 3,800 W / 15.8 A | Will not carry 25 A at all | One machine at a time |
| iGen7500PRO | 6,000 W / 25 A | Nothing. 25 A is its full rating | One machine at a time, with large reserve |
| iGen10000PRO | 8,200 W / 34.2 A | 9.2 A, enough to absorb a motor starting | Compressor and pressure washer together |
That spare capacity on the iGen10000PRO is the whole argument. It is not that the 7500PRO is a weak generator, it is that a 15 amp machine and a 10 amp machine together account for every amp it makes, before a single motor has even started.
Generator marketing talks in watts. Australian equipment is sold in amps. Mixing the two is how people end up with a generator that trips out halfway through a job.
Not everything you own, only what runs together. A pressure washer and a compressor running at once is two machines. A pressure washer, then a blower afterwards, is one. If the answer is two, you are looking at the iGen10000PRO and the rest of this is confirmation.
Australian machines come as 10 amp or 15 amp. Add the ratings of whatever runs at the same time. Two 10 amp machines is 20 amps. A 15 amp machine and a 10 amp machine is 25 amps.
| Machine | Motor | Supply it needs |
|---|---|---|
| Kranzle KHD7/122TS | Slow running 1400 rpm | 10 amp |
| Kranzle KHD10/122TS | 10 L/min, 30 to 110 bar | 10 amp |
| Kranzle KHD10/122 TST | 1.8 kW | 15 amp |
| Kranzle K1152TST | 2.8 kW intake, 2.0 kW output | 15 amp |
| BigBoi WashR Tradie | 1800 W peak brushless induction | 10 amp |
| BigBoi WashR Flo V2 | 1600 W peak induction | 10 amp |
| BigBoi BlowR PRO+ MKII | Two 1600 W motors | 10 amp |
| Chicago Pneumatic Whisper 2-50 | 1.5 kW | 10 amp |
| Chicago Pneumatic CPRC 2.5-50 | 1.86 kW | 10 amp |
Because of starting surge, a generator sized so the numbers just fit is a generator that trips. For a single machine, any of the three models has plenty in hand. For two machines running together, only the iGen10000PRO has enough left over to absorb a motor starting on top of an existing load.
They are the same thing at 240 volts, since watts equals volts times amps. But you use them for two different jobs.
Work the sockets in amps. A 15 amp outlet carries 15 amps and no more, whatever the generator behind it is rated at. That limit has nothing to do with generator size, and it is why the iGen4750PRO with its single socket is a one machine unit.
Work the headroom in watts, and allow 2.5 times. An induction motor pulls far more than its rated power for the moment it starts. The accepted rule for sizing a generator is to allow two and a half times the motor's rating for that surge. A 1.8 kW pressure washer motor therefore needs around 4,500 watts available to start, not 1,800.
That is what the starting watts figure on a generator is for.
One exception worth knowing. An air compressor that starts against tank pressure, meaning it has no unloader valve or the valve has failed, is a much harder start than a pressure washer. Allow three times for those. On a 1.86 kW compressor that is 5,580 watts rather than 4,650, which puts it beyond the iGen4750PRO. If your compressor does not vent its head pressure when it stops, size on 3x.
| Model | Running watts | Starting watts | Largest motor it will start at 2.5x |
|---|---|---|---|
| iGen4750PRO | 3,800 W | 4,750 W | About 1.9 kW |
| iGen7500PRO | 6,000 W | 7,500 W | About 3.0 kW |
| iGen10000PRO | 8,200 W | 10,000 W | About 4.0 kW |
| Machine | Motor | Needed to start it | Smallest model that starts it |
|---|---|---|---|
| Chicago Pneumatic Whisper 2-50 | 1.5 kW | 3,750 W | iGen4750PRO, comfortably |
| BigBoi WashR Flo V2 | 1600 W peak | 4,000 W | iGen4750PRO, comfortably |
| Kranzle KHD10/122 TST | 1.8 kW | 4,500 W | iGen4750PRO, with little spare |
| BigBoi WashR Tradie | 1800 W peak | 4,500 W | iGen4750PRO, with little spare |
| Chicago Pneumatic CPRC 2.5-50 | 1.86 kW | 4,650 W, or 5,580 W at 3x | iGen4750PRO only if it starts unloaded, otherwise iGen7500PRO |
| Kranzle K1152TST | 2.8 kW intake | 7,000 W | iGen7500PRO. Too much for the iGen4750PRO |
Worth knowing before you buy: the Kranzle K1152TST is the one machine in our range the iGen4750PRO will not comfortably start. At 2.8 kW intake it needs around 7,000 watts on the 2.5 times rule, and the iGen4750PRO supplies 4,750. If that is your washer, start at the iGen7500PRO.
When a second machine starts while the first is already running, the generator has to supply the first machine's running load plus two and a half times the second machine's rating, at the same instant.
| 15 amp washer running, 10 amp compressor starting | Peak demand | Starting watts available | Spare |
|---|---|---|---|
| iGen4750PRO | 6,450 W | 4,750 W | Short by 1,700 W |
| iGen7500PRO | 6,450 W | 7,500 W | 1,050 W, and every amp of its socket capacity is used |
| iGen10000PRO | 6,450 W | 10,000 W | 3,550 W |
1,800 watts for the washer already running, plus 4,650 watts to start the compressor. On the iGen7500PRO that leaves about a thousand watts and no spare socket capacity at all, which is not enough margin to rely on when a total stop washer restarts on every trigger pull. On the iGen10000PRO it leaves three and a half thousand watts. That is why we rate the iGen10000PRO for two machines and the iGen7500PRO for one.
A 10 amp machine is the easiest kind of load for a generator to carry. It leaves more capacity in reserve for the surge each motor pulls when it starts, so the engine works less, the fuel lasts longer and nothing trips.
| Machine | Supply | Why it suits generator work |
|---|---|---|
| BigBoi WashR Tradie | 10 amp | BigBoi list it as compatible with generators and extension cords. 1800 W peak brushless induction motor, 1300 psi tuned, 8.8 L/min, and 19 kg, the lightest washer here. |
| BigBoi WashR Flo V2 | 10 amp | 1600 W peak induction motor, the smallest draw of any washer we stock. 2600 psi, 7 L/min max, 3 m power cable. |
| Kranzle KHD7/122TS | 10 amp | Slow running 1400 rpm motor and a 10 amp plug. German built, 26 kg, with a 5 year warranty on the unit and 10 years on the brass pump head. |
| Kranzle KHD10/122TS (10 amp model) | 10 amp | The most flow you can get from a 10 amp supply in the Kranzle range, at 10 L/min and 30 to 110 bar adjustable. |
| Kranzle KHD10/122 TST (15 amp model) | 15 amp | A 1.8 kW motor on a 15 amp supply. Still comfortable on any of the three generators as a single machine, it just uses more of the available capacity. |
| BigBoi BlowR PRO+ MKII | 10 amp | Two 1600 W motors on a 10 amp supply. Pairs with a washer on the iGen10000PRO, or runs on its own on any model. |
Simplest pairing: a 10 amp machine on the iGen4750PRO covers most mobile detailing, and the BigBoi WashR Tradie is the easiest of the lot on a generator. Step to the iGen7500PRO if you want that same machine barely loading the engine all day, and to the iGen10000PRO only when a compressor and a washer have to run together.
| Specification | iGen4750PRO | iGen7500PRO | iGen10000PRO |
|---|---|---|---|
| What we rate it for | One machine | One machine, large reserve | Compressor and washer together |
| Maximum starting power | 4,750 W | 7,500 W | 10,000 W |
| Continuous running power | 3,800 W | 6,000 W | 8,200 W |
| Continuous running current | 15.8 A | 25 A | 34.2 A |
| 15 amp outlets in practice | One | Two | Two |
| Receptacles on the panel | 1 x 15 A IP66 | 1 x 32 A IP66, 1 x 15 A IP66 | 1 x 32 A IP66, 1 x 15 A IP66 |
| 32 to 15 A adaptor supplied | Not applicable | Yes | Yes |
| 12V DC output | Not listed | Not listed | 12V, 8 A, 100 W, IP44 |
| RCD safety switch | Yes | Yes | Yes |
| Waveform | Pure sine wave, THD under 2.5% | Pure sine wave, THD under 2.5% | Pure sine wave, THD under 2.5% |
| Alternator | Brushless permanent magnet | Brushless permanent magnet | Brushless permanent magnet |
| Engine displacement | 190 cc | 298 cc | 457 cc |
| Maximum engine speed | 4,500 rpm | 4,000 rpm | 3,600 rpm |
| Fuel tank | 12 litres | 15 litres | 30 litres |
| Run time, 1/4 load | 14 hours | 14.6 hours | 19.8 hours |
| Run time, full load | 4.2 hours | 4.6 hours | 7.3 hours |
| Noise, 1/4 load at 7 m | 57 dB(A) | 57 dB(A) | 58 dB(A) |
| Noise, full load at 7 m | 67 dB(A) | 67 dB(A) | 68 dB(A) |
| Oil capacity | 600 mL | 650 mL | 1.1 litres |
| Starting | Electric, remote and recoil | Electric, remote and recoil | Electric, remote and recoil |
| Battery | 12V maintenance free | 12V maintenance free | 12V lithium-ion |
| Generator dimensions (mm) | 660 x 374 x 574 | 690 x 530 x 550 | 767 x 630 x 675 |
| Weight, dry | 36 kg | 60 kg | 85 kg |
| Weight, wet | 46 kg | 73 kg | 109 kg |
| Product code | WP iGen4750PRO | WP iGen7500PRO | WP iGen10000PRO |
| Warranty | 2 year domestic use | 2 year domestic use | 2 year domestic use |
A cheap open frame generator and one of these both make 240 volts. The difference is what that 240 volts looks like, what protects you from it, and what happens after a hundred jobs.
| Point of difference | Typical budget open frame unit | Westinghouse iGen PRO |
|---|---|---|
| Power quality | AVR regulated fixed speed alternator. Total harmonic distortion is frequently not published at all. | Digital inverter, pure sine wave, total harmonic distortion published at under 2.5%. |
| Alternator | Commonly brushed, with brushes as a wear item. | Brushless permanent magnet. No brushes to wear or replace. |
| Electrical safety | RCD protection often not fitted, left to the user to add with a lead. | RCD safety switch fitted to the panel on every PRO model, approved for workplace use. |
| Outlet protection | Ingress rating often unstated. | IP66 rated 240V outlets on all three models. |
| Engine speed | Fixed speed regardless of load. | Engine speed follows demand, with an ECO throttle switch. |
| Published data | Often headline watts and little else. | Noise at quarter and full load, run time at quarter and full load, dry and wet weight, continuous running current, THD, GTIN. |
| Fuel use over a day | Fixed speed burns similar fuel whether loaded or idling. | Up to 14 to 19.8 hours at quarter load depending on model. |
| Support | Often no local parts or service path. | Australian distributor with a parts and service network. |
That last row is worth more than it looks. A generator that cannot be serviced is a generator you replace, and a mobile detailer whose generator is out of action is not working that week. The specification transparency matters for the same reason: every figure on this page comes from the manufacturer's published spec sheet, including the unflattering ones like full load noise and wet weight.
Carbon monoxide: Petrol generators produce carbon monoxide, which has no smell and no colour. Run the generator outdoors in open air, well away from doors, windows and the vehicle you are working in. This is the single most important rule of operating one.
The iGen10000PRO. It is the only model in the range we rate for two machines. A 15 amp Kranzle at 11 amps and a 10 amp compressor is 21 amps against a 34.2 amp continuous rating, leaving 13 amps of headroom to absorb the surge when either motor starts. The iGen4750PRO and iGen7500PRO are one machine generators.
Because running current is not the whole load. Induction motors draw several times their running current for the moment they start, a total stop washer restarts on every trigger pull, and a compressor cuts in whenever tank pressure drops. At 21 amps of running load the iGen7500PRO has about four amps in hand, which is not enough to absorb that surge reliably.
The PRO models have an integrated RCD safety switch approved for workplace use, along with IP66 rated outlets. Standard iGen models do not. If the generator is being used for paid work, that is the range to be looking at.
No. The iGen7500PRO and iGen10000PRO come with a 32 to 15 amp adaptor in the box, so the 32 amp socket becomes a standard 15 amp outlet and everything plugs in with ordinary 15 amp plugs.
Yes. Every PRO model uses the same 240V 15 amp IP66 socket behind the same RCD safety switch, and a 10 amp plug fits a 15 amp socket. Your leads and machines work identically on any of them. What changes is how many outlets there are and how much capacity sits behind them.
Yes. The 15 amp KHD10/122 TST draws 11 amps from a 1.8 kW motor, so all three PRO models have the capacity for it as a single machine. What decides the model is whether anything else runs at the same time.
Reserve, run time and portability trade-offs. A 15 amp Kranzle uses under half the iGen7500PRO's capacity, so the engine never works hard, which means less noise, less fuel and less wear. You also get a bigger tank and a second 15 amp outlet for lights and chargers. The iGen4750PRO's advantage is that it is 24 kg lighter and $1,000 less.
57 to 58 dB(A) at quarter load and 67 to 68 dB(A) at full load, measured at 7 metres. Under a working pressure washer, expect something between those figures. They are inverter units with variable engine speed, so they are meaningfully quieter than a fixed speed open frame generator of the same output.
Not by connecting it to your switchboard yourself. These units are not suitable for connection to a fixed multiple earthed neutral installation and are designed for standalone plug and socket use. A licensed electrician and the correct changeover equipment are required for any connection to fixed wiring.
Unleaded petrol, 91, 95 or 98 RON. Ethanol blends such as E10 are not recommended by the manufacturer.
Yes, and for a purchase this size it is worth it. Send us the make and model of every machine you plan to run, and whether any of them run at the same time, and we will tell you which generator fits.
Generator specifications on this page are supplied by Westinghouse Outdoor Power Equipment and are subject to change without notice. Equipment supply figures are the published requirements for each machine. Suitability guidance is general and not a performance guarantee: actual results depend on your equipment, lead length and condition, ambient temperature, altitude and duty cycle. Comparisons with budget generators describe general characteristics of that category and are not directed at any particular brand or model. Always read the instruction manual and follow the safety instructions supplied with your generator.
Tell us what you run and we will tell you which one you need. Current pricing and stock are on the product listings below.
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