The PZ72(L)-DE DC Energy Meter is a smart measurement device engineered for accurate monitoring of DC electrical systems, including solar PV, EV charging infrastructure, DC panels, and telecommunications power setups. It supports measurement of voltage, current, power, and energy (forward & reverse) and offers a range of optional functions including digital I/O, RS485 communication, and 12V auxiliary power output. With LCD or LED display and panel key configuration, it delivers precision monitoring and easy installation in a wide range of industrial and commercial DC applications.

Technical Specifications

Feature	Specification
Model Options	PZ72(L)-DE, PZ96(L)-DE
Voltage Measurement	Direct: 0–100V, 0–500V, 0–1000V
Current Measurement	Shunt: 75mV / Hall sensor: 0–2500A
Power Accuracy Class	Class 0.5
Pulse Output Constant	Default: 100 imp/kWh
Display Type	LCD (backlit, programmable delay) or LED
Communication	RS485, Modbus-RTU / DL/T645-07 (Infrared also supported)
Communication Baud Rates	1200 / 2400 / 4800 / 9600 bps
Digital Inputs	PZ72: 2 DI, PZ96: 4 DI (dry contact input)
Digital Outputs	PZ72: 2 DO, PZ96: 2 DO (relay, 2A @ 250VAC/30VDC)
12V Power Output (Optional)	Not available with DI simultaneously
Auxiliary Power Supply	AC/DC 85–265V or DC 20–60V (optional)
Power Consumption	≤2W
Environmental Rating	Temp: -25°C to +60°C, RH ≤93% (non-condensing)
Altitude Limit	≤2500m
Installation Type	Panel-mounted: 72×72mm or 96×96mm cutout
Insulation Resistance	≥100MΩ
Withstand Voltage	3kV (1 min) RMS

Functions

• Measures real-time DC voltage, current, power, and energy
• Calculates forward and reverse energy separately
• Supports multi-rate (TOU) metering: 4 time zones, 2 schedules, 14 time points
• Records up to 12 months of historical energy data (PZ72L-DE only)
• Pulse output for external data acquisition systems
• Optional DI/DO for remote control and alarm triggering
• Compatible with external shunt or Hall current sensors
• Configurable display and parameters via onboard buttons

Applications

• Solar photovoltaic DC monitoring
• Electric vehicle charging stations
• Telecom base station DC load supervision
• Battery energy storage and UPS systems
• Industrial DC distribution boards

Manufacturer Information

Acrel Co., Ltd., established in 2003, is a high-tech enterprise specializing in energy efficiency management and electrical safety solutions. With a comprehensive product line ranging from cloud platform software to sensors, Acrel offers smart energy meters, power sensors, and protection devices. Their products are widely utilized across industries such as electric power, communications, rail transit, petrochemical, and construction. In 2012, Acrel was listed on the Growth Enterprise Market with the stock code 300286.SZ. The company is committed to delivering innovative and reliable energy management solutions to its global clientele.