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Product at a glance

Smart, flexible and future proof

Liberty 100 is a single-phase smart electricity meter to meet the growing smart metering requirements. It has a modular architecture for both WAN and HAN. This enables multiple communications options to be deployed. The modules can be replaced in the field, which means that investment in the meter is protected even if the communication technology needs to be changed during the meter life. There is a pre-installed communication module. This acts as a hub for communication between the head end system and to the gas meter/in home display. Both the meter and communications hub are capable of remote firmware upgrade after installation. This allows or the changing of both features and functionality. Liberty 100 supports both credit and Pay As You Go (PAYG) modes of operation.


  • Smart electricity meter with a communication hub for dual fuel (electricity + gas) and single fuel (electricity) domestic customers, in both credit and PAYG modes
  • Metering for small commercial premises including credit and PAYG modes
  • Import and export metering for local generation


  • Modular communication module allows multiple WAN and HAN options for different communications providers
  • Simple installation, registration and pairing process
  • Remotely switchable between credit and PAYG modes
  • Assists consumers in reducing energy consumption


  • Meets requirements of SMETS1 and SSWG
  • Four-quadrant measurement with import/export registration
  • Time of use/complex tariffs and maximum demand
  • Logging of multi parameter load survey, billing data, and events including power outage and abnormalities
  • Integrated contactor
  • Multiple WAN communication options – GPRS, long range radio
  • Liberty 100 communication hub acts as a coordinator for Zigbee HAN and as a mirror for gas meter data
  • Credit and PAYG modes (meter maintains account and tariffs)
  • Keypad to enable local entry of Pay as You Go token if WAN not available
  • Remote firmware upgrade (not metrology)


Connection type Direct connected
Wiring configuration Single phase, two wire
Voltage range 230 Vac (nom)
Current range 0.5-20 (100) A
Accuracy Active energy MID class B, reactive energy class 2.0
Mains frequency 50 Hz ± 5%
Burden Compliant with relevant standard
Standards MID class B EN 50470-1,3; IEC62053-23
Modular design Field replaceable communication module
Dimensions (W x H x D) 140 x 175 x 60 mm
Terminals Tunnel type with 2 screws compliant to Bs7856
Enclosure Flame retardant polycarbonate
Weight 1 kg (approx.)
Ingress protection IP 54
Insulation class Protective class II
Temperature -25 C to +55C (operating), -25 C to +70 C (storage)
Humidity 95% non-condensing
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