DC 0-300V RS485 Modbus Power Meter Module with Shunt

DC 0-300V RS485 Modbus Power Meter Module with Shunt (50A-300A) for Home Assistant & RV Solar System

$39.99 $60.00

规格型号 Communication box + 50A splitter + USB to 485 cable Communication box + 100A splitter + USB to 485 cable Communication box + 200A splitter + USB to 485 cable Communication box + 300A splitter + USB to 485 cable

DC 0-300V RS485 Modbus RTU Smart Power & Energy Monitor

Monitoring your off-grid battery bank, solar array, or RV power system shouldn't require clunky setups or guesswork. This compact RS485 Modbus RTU power meter box measures DC voltage, current, power, and total energy consumption with high precision—delivering real-time telemetry straight to your Home Assistant, ESPHome, PLC, or custom Modbus gateway.

Why DIY Builders & Smart Home Automation Enthusiasts Choose This Module

Seamless Home Assistant Integration: Native Modbus RTU RS485 protocol allows instant integration with Home Assistant, ESPHome, Tasmota, and Node-RED for real-time dashboard tracking and low-voltage alerts.
Wide DC Voltage Range: Accurately measures system voltages from 0 to 300V DC (supports independent power supply for low-voltage setups below 7V), making it ideal for 12V, 24V, 36V, 48V, and high-voltage DIY battery banks.
Heavy-Duty Shunt Support: Pairs with 50A, 100A, 200A, or 300A external brass shunts to handle high continuous currents from inverters, solar charge controllers, and battery chargers without thermal issues.
Optocoupler Isolation & Safety: Features built-in physical isolation between test circuits and communication ports to protect your Raspberry Pi, PC, or Modbus master from voltage spikes.

Technical Specifications

Voltage Measurement Range: 0.05V – 300V DC (Resolution: 0.01V, Accuracy: 1.0%)
Current Measurement Range: 0.02A – 300A DC (via external 75mV Shunt, Accuracy: 1.0%)
Power Measurement Range: 0.2W – 90kW (Resolution: 0.1W)
Energy Measurement Range: 0 – 9999kWh (Overflow auto-reset)
Communication Protocol: RS485 Serial (Modbus RTU, Default: 9600-8-N-1)
Certifications: CE (BSTXD21051590102EC), RoHS, FCC
Dimensions & Weight: Main Module: 90 x 60.5 x 23 mm (Weight: ~52g)
Operating Environment: -20°C to +60°C

Package Options

Meter Box Only: 1x PZEM-017 RS485 Modbus DC Meter Module
With USB Adapter: 1x Meter Module + 1x High-Speed USB-to-RS485 Serial Cable
Complete Shunt Kit: 1x Meter Module + 1x External Brass Shunt (50A/100A/200A/300A) + Optional USB-to-RS485 Cable