Yocean specializes in producing a range of smart prepayment and post-payment electricity meters and strives to deliver dependable and high-standard products that fulfill customers’ demands in the energy industry. By prioritizing innovation and customer contentment, Yocean is well-positioned to influence the smart meter manufacturing sector substantially.

Some of the models of smart meters we locally manufacture include the P12G04 (1P2W DIN-Rail Prepayment Meter), CIU-PH04 (Customer Interface Unit), Smart S34U18 (3P4W Smart prepayment & post-payment meter), and S12U16 (1P2W Smart prepayment and post-payment meter), and M12U02 (single-phase two-wire post-payment meter).

The year 2018, we locally manufactured single-phase and 3 phase prepayment smart meters and successfully supplied more than 89,000 single-phase prepaid meters to KPLC by August 2021

Single Phase Prepaid Meter.

P12G04 is a DIN-Rail Single-phase Prepayment meter used in a split prepayment metering system. It complies with STS standards and communicates with a CIU by PLC for energy consumption monitoring and credit charging. 

Conform to the international STS standard, the unique international open safety transmission standard for prepayment system.

P12G04 1P2W DIN-Rail Prepayment Meter.
Terminal wiring

Principle of work

P12G04 single phase two wires prepayment meter has: Electricity Measuring Unit, which consists of a voltage sampling network, current sampling network and integrated measuring circuit; the Data Process Unit consists of MCU & memory; the Power Supply Unit consists of AC power & battery pack; an Input/output Unit consisted of optical communication, PLC communication, MC171 communication and Load Control Unit, which consists of relay control 

Reference Standards



IEC 60529

Degrees of protection provided by Enclosures (IP Code)

IEC 60695-2-11:2014

Fire Hazards Testing-Part 2-Test Methods-Section I/sheet: Glow-wire, End-product test and guidance

IEC 61000-4-2:2008

Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement techniques – Electrostatic discharge immunity test

IEC 61000-4-3:2006

Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test

IEC 61000-4-4:2012

Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement techniques – Electrical fast transient/burst immunity test

IEC 61000-4-5:2014

Electromagnetic Capability (EMC)-Part4-5: Testing and measurement, Techniques- Surge immunity test.


Safety requirements for electrical equipment for measurement, control, and laboratory use- Part 1: General requirements

IEC 61140:2016

Protection against electric shock-common aspects for installation and equipment


Electricity metering equipment (A.C.) -General requirements, Tests and Test conditions -Part 11: Metering equipment


Electricity metering equipment – Particular requirements -Part21:Static meters for AC active energy(classes 0.5,1 and 2)


Electricity metering equipment (A.C.) -Particular requirements Part31:Pulse output devices for electromechanical and electronic meters