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Product at a glance

Know how much you are paying, reliable and secure

Liberty 150 is an intelligent single-phase prepayment energy meter that provides real-time and historical information on consumption and accounting. It supports a wide range of tariff facilities. The interactive in-home display (IHD) combines convenience with flexibility by enabling key transactions such as token transfer, without the need of directly interacting with the meter. The IHD device has an inbuilt bluetooth functionality that allows it to receive the vend token from a mobile application. This information is later communicated by the IHD to the meter using a wired connection. Liberty 150 is supported by a web-based vending system that is highly secure, flexible and easy to integrate with utility and payment service provider’s systems.


  • Domestic metering
  • Commercial metering
  • Temporary connections
  • Government establishments


  • Utility
    • Reduced overheads - no need for costly and problematic monthly billing
    • Improved revenue - receive payment for energy before it is consumed
    • Effective and efficient load management, through load switch in the meter
    • Quick and simple tariff implementation at site
  • Consumer
    • Electricity can be purchased according to need
    • Facilitates energy consumption monitoring and budgeting
    • No uncertainty about consumption and bill
    • No late payment or reconnection fees
    • Supports multiple vending options, for quick and easy purchasing


  • In-home display (IHD) enables transfer of token using a mobile app and view consumption in real time
  • Two-line display on IHD guides the consumer through processes such as token entry
  • ‘Friendly credit’ facility, ensuring no disconnections outside office hours
  • Audible low-credit warning from the IHD prompts the consumer to ‘top up’
  • Emergency credit facility prevents disconnection if the consumer is unable to top-up in time
  • Programmable ‘high load’ alert helps the consumer avoid disconnection due to overload


Connection type Direct connected
Wiring configuration 1-phase 2-wire
Voltage range 240/230 V(L-N), – 40% to +30%
Current range 5-60 A or 10-100A*
Accuracy Class 1.0 for active energy
Mains frequency 50 Hz
Display Graphical, with green backlight
Standards IS 13779 and IS 15884, IEC 62055-31
Dimensions (W x H x D) 148 x 208 x 71 mm (with extended terminal cover)
Weigh 0.9 kg (approx.)
nclosure Engineering plastic
Sealing 2 sealable screws on main cover, 1 on optical port, 1 on terminal cover
Ingress protection IP 53
Temperature -10C to 60C (operating) | -25C to 80C (storage)
Humidity 95%, non-condensing
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