Energy Meter Wattmeter GreenBlue GB364 E — 220–240V AC, 50Hz, max 16A, IP20, built-in battery

GreenBlue GB364 E is a compact plug-in energy meter designed for monitoring mains electricity consumption in homes and small offices. The wattmeter measures real-time power and cumulative energy consumption on standard 220–240V AC, 50Hz circuits and supports loads up to 16A. An IP20 enclosure suits indoor use, and a built-in battery preserves settings and recorded cumulative values when mains power is interrupted.

Advantages

The device provides continuous measurement of active power and total energy consumption with a simple plug-and-play design that requires no additional wiring. Its compact form factor allows easy installation between wall outlets and appliances. IP20-rated housing is appropriate for protected indoor environments, and the internal battery maintains user settings and accumulated data during brief power outages.

Suitable for

• Monitoring electricity usage of household appliances such as refrigerators, TVs, computers and heaters
• Assessing power consumption in small office equipment and workstations
• Performing quick load checks to identify high-consumption devices
• Estimating running costs and verifying energy-saving measures

When it may not be suitable

Because the GB364 E is IP20-rated, it is intended for indoor use only and should not be used in wet, dusty or outdoor environments. The meter supports a single-phase mains supply at 220–240V AC, 50Hz and a maximum continuous current of 16A; it is not suitable for three-phase installations or for loads that exceed the rated current.

Key specifications

• Supply voltage: 220–240V AC, 50Hz
• Maximum load/current: 16A
• Measured values: real-time active power and cumulative energy (kWh)
• Protection class: IP20 (indoor use)
• Power retention: built-in battery for settings and cumulative values
• Form factor: plug-in wattmeter, compact housing

How to use

Plug the GreenBlue GB364 E into a standard wall outlet and connect the appliance to be measured into the meter's socket. The display will show real-time power consumption and accumulated energy usage automatically. Use the device controls to view cumulative kWh values and to access available display modes. The built-in battery keeps settings and accumulated readings when mains power is removed; reconnecting mains resumes measurement and updates totals.

What to consider before purchase

• Confirm that your supply is single-phase 220–240V AC at 50Hz and that the monitored load does not exceed 16A.
• Use only in indoor, dry, and protected environments due to IP20 protection.
• If you need monitoring for multiple circuits, three-phase systems, or outdoor installations, consider a different meter model suited to those conditions.

Usage recommendations

For reliable results, place the meter on a dedicated outlet that is free from frequent plug switching and avoid connecting multi-socket extension leads that may introduce additional losses. Record baseline readings before and after testing appliances to accurately compare consumption, and periodically check the device for signs of damage or overheating when measuring high-draw loads near the 16A limit.