EpEver RS485-1M2S Expansion Module

The EpEver RS485-1M2S is a compact expansion module that allows you to connect multiple devices, such as an MT75 Remote Display, WiFi modules, or PC software, simultaneously to your EpEver MPPT charge controller and/or inverter. This module is essential for users who want to expand and monitor their off-grid system via the reliable Modbus protocol.

Key Features

• Dual RS485 Master Ports: Parallel ports (1-1 and 1-2) for connection to one or two master devices such as an EpEver brand MPPT charge controller or inverter.
• Independent RS485 Slave Ports: Two separate ports (2 and 3) for connecting monitoring equipment such as an MT75 display, Bluetooth module, or PC software.
• Modbus Support: Communicates via the standard Modbus protocol for reliable data transfer.
• Adjustable Baud Rate: Easy setting of the communication baud rate (9600 or 115200) with a single button press.
• LED Indicators: Clear status display for power and communication.
• External Power Supply: Supports an auxiliary voltage of 8–70V DC for devices with higher power consumption.

Technical Specifications

• Model: RS485-1M2S
• Compatible Products: EpEver charge controllers, inverters, and inverter/charger combinations
• Power Supply: 5V DC via communication port of the controller/inverter
• Auxiliary Voltage: 8–70V DC via external battery (optional)
• Power Consumption: 0.3W
• Communication Baud Rate: 9600 or 115200 bps (default: 115200)
• Operating Temperature: -30°C to +50°C
• Storage Temperature: -30°C to +80°C
• Enclosure: IP30
• Dimensions: 121 x 88 x 27.5 mm
• Mounting Holes: 2 x Ø4.8 mm (spacing: 69 mm)
• Weight: 121.8 g

Included Accessories

• 2 x RS485 communication cables (1.5 m)
• 1 x 5.08-2P terminal for external power supply

Application Scenarios

This module is ideal for situations where you want to connect multiple monitoring devices to a single charge controller or inverter. For example:

• Use with the MT75 Remote Display for real-time monitoring and control.
• Connection of both a Bluetooth module and a PC for simultaneous monitoring and configuration.
• Expansion of communication ports in complex off-grid systems with multiple devices.

With the EpEver RS485-1M2S expansion module, you can easily expand the communication capabilities of your off-grid system, giving you more control and flexibility in managing your energy solutions.