Electricity Meter Growatt PV Smart Meter TPMCTE100A 100A — for PV systems, CT-based measurement

Growatt PV Smart Meter TPMCTE100A is a three-phase CT-based electricity meter for photovoltaic (PV) systems, designed to measure AC current up to 100 A and to monitor generation, consumption and grid export. The meter communicates via RS485 using the Modbus RTU protocol, is compatible with Growatt PV inverters, and is intended for DIN-rail mounting in residential or small commercial PV installations.

Advantages

The meter provides Class 1 measurement reliability for voltage, current, power and frequency with values suitable for energy management and export limitation. It features an LCD display for local readings, low power consumption (2 W), compact dimensions for DIN-rail installation, and IP51 protection for typical indoor installations. Ready RS485 interface with a 15 m cable and Modbus RTU protocol ensures straightforward integration with Growatt inverters and monitoring systems.

Suitable for

• Residential and small commercial photovoltaic installations
• Self-consumption monitoring and grid export limitation
• Integration with Growatt inverters and energy management systems
• Three-phase, four-wire (3P4W) PV systems

Key specifications

• Rated voltage: AC 230/400 V
• Line-to-line voltage range: AC 173–480 V
• Line-to-neutral voltage range: AC 100–289 V
• Current: 100 A (CT-based)
• Frequency: 50/60 Hz
• Phases: 3 (3P4W)
• Accuracy class: Class 1 (voltage/current 0.5%, power 1%, frequency 0.2%)
• Interface: RS485, baud rate 9600 bit/s, Modbus RTU
• Installation: DIN rail 35 mm
• Dimensions: 95.5 x 72 x 65 mm
• Protection class: IP51
• Operating temperature: -25 °C to 55 °C
• Operating humidity: 0–90% non-condensing
• Power consumption: 2 W
• RS485 cable length: 15 m
• Weight: 280 g
• Colour: white
• Certifications: CE
• Warranty: 24 months

How to use

Mount the Growatt PV Smart Meter TPMCTE100A on a 35 mm DIN rail inside the distribution board and connect CTs and voltage inputs according to the system wiring diagram. Use the RS485 interface and Modbus RTU protocol at 9600 bit/s to connect the meter to a Growatt inverter or energy management system for monitoring and export control. Verify correct phase sequence and wiring, then power the meter and check readings on the LCD display to ensure proper operation.

Recommendations

Install and commission the meter following local electrical codes and the manufacturer quick guide. Ensure CTs are correctly oriented and sized for 100 A measurement, keep the meter in an environment within the specified temperature and humidity ranges, and use the supplied RS485 cable length consideration (15 m) when planning communication runs.