myenergi harvi langaton tehoanturi HARVI-65A3P

The myenergi harvi is a self-powered wireless power sensor that eliminates the need for a wired Modbus RTU connection in energy management systems. It transmits current measurement data from up to three CT inputs via 868 MHz radio to compatible my-PV devices such as the AC ELWA-E, AC ELWA, and Power Meter. Harnessing energy directly from the current transformers, harvi requires no external power supply or batteries, making installation clean and maintenance-free. With a range of up to 30 meters indoors and 100 meters line-of-sight outdoors, it offers flexible placement near the distribution board. The compact DIN rail mountable housing (2 TE) fits neatly into standard electrical enclosures, while the IP20 rating suits indoor use. A status LED provides clear indication of operation and communication. harvi supports standard current transformers with 1A or 5A secondary current or 333mV output, measuring up to 63A per phase depending on the connected CTs. It operates in temperatures from -20°C to +50°C and is CE compliant.

Advantages

Self-powered via current transformers – no batteries or external supply needed. Wireless 868 MHz communication replaces complex cabling. Three CT inputs for single or three-phase monitoring. Wide compatibility with my-PV energy managers. Compact DIN rail design for easy integration. LED status for quick diagnostics. Reliable operation across a broad temperature range.

Suitable for

• Retrofitting existing my-PV systems without wired Modbus connections
• Monitoring current in single-phase or three-phase installations
• Installations where running signal cables is impractical
• Energy management setups requiring remote current sensing
• Indoor electrical cabinets with DIN rail mounting

Key specifications

• Wireless technology: Proprietary 868 MHz (Europe)
• Power supply: Self-powered from CT inputs (min. primary current >1A)
• Measurement inputs: 3 x current transformer (CT)
• CT compatibility: 1A or 5A secondary, or 333mV output
• Max measurable current: 63A per phase (CT dependent)
• Wireless range: up to 30 m indoor, 100 m outdoor line-of-sight
• Installation: DIN rail (2 TE) or wall mount
• Operating temperature: -20°C to +50°C
• Protection class: IP20
• Housing: flame-retardant plastic
• Certifications: CE

Recommendations

For optimal performance, install harvi within 30 meters of the receiving device and ensure the CTs are properly clamped around the phase conductors. Use only compatible current transformers with the correct secondary rating. Mount the unit in a dry, indoor location on a DIN rail for secure fixation. Verify LED status after commissioning to confirm communication with the my-PV energy manager.