Unlike traditional generators which only run at one speed whatever the load demands, the variable speed generator combines the latest control technology and PMG alternator and will run at the most efficient RPM (between 900 – 2000) dependent on the energy requirement; providing just enough power for the load and to charge/top up the batteries without any waste.

When demands are low the generator will run at just 900 RPM, producing very low noise, using less fuel, and less CO2 and NOX.

For times when a higher load is demanded the generator can move up in speed to anything up to 2000RPM; delivering higher amounts of power, quickly and efficiently.

The batteries within each unit act as an energy store; so at times of very low demand, or when completely silent power is required, the batteries alone can run the load, the generator will not need to start at all. At this point no fuel is used and emissions are at zero.

It’s efficiency and flexibility makes it suitable for temporary power, off grid power, construction sites, rental applications, disaster relief, industrial backup, farms, telecom BTS sites, rail amd more.

The standard unit comes with 15kWh of battery storage (nominal) using the very latest lithium technology. These batteries have a superior performance which enables use at temperatures as low as -25ºC. The battery storage can be expanded up to 45kWh (nominal) as an option.

VariPower uses the Perkins 404D-22 – a powerful but quiet 2.2 litre naturally aspirated 4 cylinder compact engine designed to meet EU Stage IIIA/U.S. EPA Tier 4 interim emissions standards.

The 4 cylinder engine is designed to meet power generation needs in both unregulated territories where extreme conditions are likely, and higher regulated territories with more stringent emissions standards.

It was selected for the VariPower due to its power density, durability and fuel efficiency. The quiet operation makes it an excellent option as part of a unit designed to reduce noise to a minimum.

The proprietary control system offers a straightforward way to operate and control the VariPower.

The display screen allows monitoring of all the relevant data from the engine, batteries and power electronics. This information can also be viewed remotely via an optional 3G internet connection allowing the reading to be seen on a tablet, PC or smart phone.

The simple design makes it perfect for use in fixed, rental and temporary environments, whilst the remote access gives the flexibility for owners to see the data from the unit wherever they are.

These often run 24 hours a day to provide constant power to ensure that mobile phone coverage is continuous. Using this method of prime power in a remote location can increase operational costs significantly due to fuel usage and services.

In a recent deployment, VariPower was used to power a remote BTS in the North of England, during the first month, it showed a 68% reduction in runtime with an 80% fuel and servicing saving. This fuel saving reduced the related emissions of CO2 and PM2.5 by up to 80%, and further savings will be made by the use of renewables which are easily integrated into the VariPower system.