
Active Power CLEANSOURCE® PLUS MMS
CLEANSOURCE® PLUS MMS is the multi-module version of the PLUS series. The system is built from modules and can be expanded on site as the load grows.
- Data centres growing in phases
- Sites with N+1 requirements
- Projects avoiding battery rooms
Technical data
| Manufacturer | Active Power (Piller) |
| Type | Flywheel UPS |
| Power | 300–2400 kW @ 50 Hz |
| Building blocks | 333 kW building blocks (60 Hz) |
| Efficiency | Up to 98 % |
| Ride-through | Up to 2 minutes (configuration dependent) |
| Ambient | Up to 40 °C |
Source: www.activepower.com.
Technology
How it works
Each module has its own flywheel, so energy storage scales with power. The modular design provides redundancy without a battery plant to size and replace separately.
The manufacturer states total cost of ownership can be up to 40 % lower over the product life compared with battery-based systems.

Application
Where it fits
- Data centres growing in phases
- Sites with N+1 requirements
- Projects avoiding battery rooms
Versions and options
- Field expansion
- CSView and BMS integration

Service
Operation and maintenance
Annual check-up and bearing changes at the manufacturer's interval; no battery replacements.
A rotary plant should always be load-tested at commissioning – stepped load, utility failures and transfer to engine.

Other models from Piller
Read more at Bluecircle
Norwerk’s partner Bluecircle has in-depth pages on the topic.
Do you have a project or a system that needs service?
Send us the load, required autonomy and voltage level – or describe the task. We will come back with a solution sized for your operation.