Description
Pramac GPW20Y – 20 kVA Mobile Diesel Generator
Yanmar Stage V power. Mecc Alte output. Built to move.
The GPW20Y diesel generator is the Yanmar-engined 20 kVA class set in the GPW mobile range, built around a water-cooled Yanmar 4TNV88 Stage V engine running at 1500 RPM with mechanical governor. Output is delivered through a brushless Mecc Alte ECP28 M4 C alternator at 400/230 V, 50 Hz, three phase, 0.8 power factor, with class H insulation and IP23 protection. The unit supplied is the FS5 build (BF180TYAD01) with the ACP automatic control panel on a DSE7320 MKII controller and 32 A four pole breaker, battery isolator (MBS), galvanised skid base (GSB), quick fit fuel connectors (QFC), three way fuel valve (TWF), water separator filter (WSP), heavy-duty air filter (HDF), MFT-S sub-base fuel tank and external terminal board (ETB).
The canopy is a weatherproof galvanised sheet metal enclosure with residential silencer and high quality soundproofing, with large lockable lateral doors for service and a welded steel baseframe carrying anti-vibration mountings, screwed support legs and a crane handling hole. Contact Ozwide Power for the full performance data on this unit.
GPW20Y at a glance
- 20 kVA class three phase mobile diesel generator
- Yanmar 4TNV88 Stage V engine, water cooled, 1500 RPM, mechanical governor, 12 V electric start
- Mecc Alte ECP28 M4 C brushless alternator, 4 pole, class H, IP23
- 400/230 V, 50 Hz, three phase, 0.8 power factor
- ACP automatic control panel with DSE7320 MKII controller and 32 A four pole breaker
- MFT-S sub-base metal fuel tank, three way fuel valve and quick fit fuel connectors
- Galvanised skid base, water separator filter, heavy-duty air filter, external terminal board
Optional equipment on the GPW range includes differential protection (ADI), a front-mounted sockets panel, pre-heating (PHS), air shut-off valve (ASV), electronic engine governor (EEG), exhaust spark arrestor (ESA), hot parts protection (HPP), alternator winding total protection (WTP) and anti-condensation heater (ACH).
EC mark compliant to 2006/42/CE, 2014/30/UE, 2014/35/UE, 2000/14/EC and 97/68/EC, built to EN 12100, EN 13857 and EN 60204 under ISO 9001, with G2 class load acceptance to ISO 8528-5:2013.
| POWER RATING | ||
| VOLTAGE | V | 400/230 |
| FREQUENCY | Hz | 50 |
| POWER FACTOR | cos φ | 0.8 |
| PHASES | 3 | |
| FUEL | Diesel | |
| ENGINE SPECIFICATIONS | ||
| EXHAUST EMISSION LEVEL | Stage V | |
| ENGINE BRAND | Yanmar | |
| MODEL | 4TNV88 | |
| ENGINE COOLING SYSTEM | Water | |
| SPEED GOVERNOR | Mechanical | |
| OPERATION SPEED NOMINAL | RPM | 1500 |
| STARTING SYSTEM | Electric | |
| ELECTRIC CIRCUIT | V | 12 |
| FUEL | Diesel | |
| ALTERNATOR SPECIFICATIONS | ||
| ALTERNATOR BRAND | Mecc Alte | |
| MODEL | ECP28 M4 C | |
| TYPE | Brushless | |
| POLES | 4 | |
| CLASS | H | |
| IP PROTECTION | 23 | |
GPW Series – Mobile Diesel Generators
Modular. Mobile. Made for Professionals.
The GPW Series is a family of mobile diesel generators engineered for high-demand applications across construction, industrial operations, rental fleets and large events. Built on a modular and scalable platform, the GPW range allows each unit to be tailored precisely to the job, ensuring the right level of performance without unnecessary cost or complexity.
Designed for professional use, every GPW unit offers strong electrical performance, robust structural integrity and practical usability. The modular architecture supports a wide combination of mechanical and electrical configurations, making the range adaptable to different site conditions and operational requirements. Its streamlined layout, wide service doors and strong protective features ensure safe operation and fast maintenance in challenging environments.
Key Features
- Engine options: Perkins and Yanmar, paired with Mecc Alte brushless alternators
- Canopy and Extra Silent enclosure versions, zinc-plated and weatherproof
- Segregated control and power sections with MRS manual remote start or ACP automatic control panels
- Plastic or metal fuel tanks, internal or sub-base, for 8 to 60+ hours of autonomy
- Single-point lifting bridge, forklift access and optional galvanised skid base
- Hot parts protection, rain flaps, wide access doors and modular trays
Whether supporting critical operations, temporary site power or rental applications, the GPW Series is built to keep the work moving.
Frequently Asked Questions
Which control panel comes with a GPW generator?
GPW sets are supplied with either the MRS manual remote start panel, which adds an automatic mains failure start function, three phase mains measurement and a 50 event log, or the ACP automatic control panel with full AMF operation, detailed event and performance logging and optional remote control and I/O expansion modules. Specify the panel when ordering.
What enclosure versions are available?
Every GPW model is available as a standard canopy with residential silencer and galvanised weatherproof sheet metal, or as a Canopy Extra Silent version with additional soundproofing modules for city centre and noise-restricted sites.
Is an automatic transfer switch (ATS) included?
No. An automatic transfer switch is not included unless it is listed in the product description above. Ozwide Power can supply a correctly rated ATS with the generator, so ask for a package price when you enquire.






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