The Ultimate Guide to PRAMAC Generator Ranges: GBW vs GPW vs GRW vs P Series

When it comes to choosing the right industrial generator, understanding the differences between each series can be the key to getting best-value, reliable performance and ensuring your power supply perfectly matches your business needs. In this guide we’ll compare the major PRAMAC generator ranges - GBW, GPW, GRW, and the P Series - looking at ideal applications, power output and benefits, so you can make an informed decision.

The Ultimate Guide to PRAMAC Generator Ranges

Compare the GBW, GPW, GRW, GDW, and P Series at a glance — ideal applications, power range, and key benefits to help you choose the right PRAMAC generator for your needs.

Series	Ideal Applications	Power Range / Output	Key Benefits
GBW Series	Commercial sites, smaller industrial backup, mobile use	Approx. 22 kVA - 26 kVA (various configurations)	Robust canopy design, sound-attenuated, compact footprint
GPW Series	Mobile power rental, temporary on-site supply, road-transportable	Approx. < 25 kVA - 1150 kVA (various configurations)	Easy handling, fast commissioning, modular options
GRW Series	Rental, construction, larger site power, events, critical backup	Approx. < 25 kVA - 750 kVA (various configurations)	Versatile, low-noise, excellent service access, scalable
P Series	Compact industrial, sensitive loads, smaller businesses or supplementary systems	Approx. < 4 kVA - 16 kVA (various configurations)	Clean power, fuel-efficient, low-noise, portable or semi-fixed

Note: Figures and examples are representative — always confirm specifications with product datasheets or by contacting our team.

Speak to our team or try our free generator calculator

1. GBW Series – Reliable Access to Standby Power

The GBW range is PRAMAC’s workhorse - ideal when you need a robust generator for backup or mobile industrial use. For example, the GBW22P model delivers 22 kVA standby power (17.6 kW) in a 3-phase 400 V configuration.
With water-cooled Perkins engines, soundproof canopy options and industrial build quality, it offers great value and reliability for smaller to mid-sized operations.

2. GPW Series – Mobile Power Engineered for Flexibility

If your application involves frequent transport or temporary sites, the GPW series is built for that. From its design brief of “suitable for mobile application where features such as easy handling and transportation, fast commissioning and simple servicing are key”, it ensures you’ll get a unit that’s designed to be lifted, moved and installed quickly, meaning downtime is minimised.

3. GRW Series – When You Need More Capacity & Versatility

The GRW series steps up the game: designed for the more demanding industrial environments. For example, the GRW150I/S5 specifies 165.0 kVA ESP at 50 Hz.
It offers large access panels, high autonomy fuel tanks and modular configuration for rental fleets or permanent site installations.

5. P Series – Compact, Efficient & Clean Power

Although the P series spans both residential and lighter industrial use, it also has a place in the industrial portfolio for smaller businesses or supplemental power. The range is popular not only for its affordable price, but also for its power and portability. This series is a great option for many smaller businesses as it is very flexible and compact.
If you need efficient standby without the full footprint of a large canopy generator, the P series fits the bill.

How to Choose the Right Series for YOU

• Power requirement: Calculate the load you need (equipment, lighting, HVAC, servers).

• Three-phase vs single-phase: Many industrial sites require 400 V three-phase output.

• Mobility vs fixed installation: Mobile use = GPW/GRW; fixed backup = GBW.

• Noise & emissions: If near residential or urban zones, check sound ratings and Stage V compliance (GPW & GRW include compliant models).

• Maintenance & budget: Larger series often bring more complexity; if you need simplicity, GBW or P might be better.

Speak to our team to match the right PRAMAC generator to your needs or try our free generator calculator to find your best match.

By understanding the strengths of each series, you can confidentl­y choose a generator that aligns with your business’s size, budget and future growth - rather than overspending or undershooting your needs.