{"product_id":"dc-0-300v-rs485-modbus-power-meter-module-shunt","title":"DC 0-300V RS485 Modbus Power Meter Module with Shunt (50A-300A) for Home Assistant \u0026 RV Solar System","description":"\u003ch2 data-path-to-node=\"11\"\u003eDC 0-300V RS485 Modbus RTU Smart Power \u0026amp; Energy Monitor\u003c\/h2\u003e\n\u003cp data-path-to-node=\"12\"\u003eMonitoring 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.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"14\"\u003eWhy DIY Builders \u0026amp; Smart Home Automation Enthusiasts Choose This Module\u003c\/h3\u003e\n\u003cul data-path-to-node=\"15\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"15,0,0\"\u003eSeamless Home Assistant Integration:\u003c\/b\u003e 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.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"15,1,0\"\u003eWide DC Voltage Range:\u003c\/b\u003e 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.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"15,2,0\"\u003eHeavy-Duty Shunt Support:\u003c\/b\u003e 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.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"15,3,0\"\u003eOptocoupler Isolation \u0026amp; Safety:\u003c\/b\u003e Features built-in physical isolation between test circuits and communication ports to protect your Raspberry Pi, PC, or Modbus master from voltage spikes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"17\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-path-to-node=\"18\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,0\"\u003eVoltage Measurement Range:\u003c\/b\u003e 0.05V – 300V DC (Resolution: 0.01V, Accuracy: 1.0%)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,1,0\"\u003eCurrent Measurement Range:\u003c\/b\u003e 0.02A – 300A DC (via external 75mV Shunt, Accuracy: 1.0%)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,2,0\"\u003ePower Measurement Range:\u003c\/b\u003e 0.2W – 90kW (Resolution: 0.1W)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,3,0\"\u003eEnergy Measurement Range:\u003c\/b\u003e 0 – 9999kWh (Overflow auto-reset)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,4,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,4,0\"\u003eCommunication Protocol:\u003c\/b\u003e RS485 Serial (Modbus RTU, Default: 9600-8-N-1)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,5,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,5,0\"\u003eCertifications:\u003c\/b\u003e CE (BSTXD21051590102EC), RoHS, FCC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,6,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,6,0\"\u003eDimensions \u0026amp; Weight:\u003c\/b\u003e Main Module: 90 x 60.5 x 23 mm (Weight: ~52g)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,7,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,7,0\"\u003eOperating Environment:\u003c\/b\u003e -20°C to +60°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"20\"\u003ePackage Options\u003c\/h3\u003e\n\u003cul data-path-to-node=\"21\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"21,0,0\"\u003eMeter Box Only:\u003c\/b\u003e 1x PZEM-017 RS485 Modbus DC Meter Module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"21,1,0\"\u003eWith USB Adapter:\u003c\/b\u003e 1x Meter Module + 1x High-Speed USB-to-RS485 Serial Cable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"21,2,0\"\u003eComplete Shunt Kit:\u003c\/b\u003e 1x Meter Module + 1x External Brass Shunt (50A\/100A\/200A\/300A) + Optional USB-to-RS485 Cable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0806\/0013\/7828\/files\/4_2.png?v=1791228733\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0806\/0013\/7828\/files\/4_3.png?v=1791228733\" alt=\"\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GFL Tech","offers":[{"title":"Communication box + 50A splitter + USB to 485 cable","offer_id":67626878894180,"sku":"Communication box + 50A shunt + USB to 485 cable","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Communication box + 100A splitter + USB to 485 cable","offer_id":67626878926948,"sku":"Communication box + 100A shunt + USB to 485 cable","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Communication box + 200A splitter + USB to 485 cable","offer_id":67626878959716,"sku":"Communication box + 200A shunt + USB to 485 cable","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Communication box + 300A splitter + USB to 485 cable","offer_id":67626878992484,"sku":"Communication box + 300A shunt + USB to 485 cable","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0806\/0013\/7828\/files\/DC_Communication_Module_Shopify_Banner_Set_2.png?v=1791228168","url":"https:\/\/guangfeilai.com\/fr\/products\/dc-0-300v-rs485-modbus-power-meter-module-shunt","provider":"GFL Tech","version":"1.0","type":"link"}