EPEVER MT52 Remote Meter User Manual

1. Introduction and Overview

The EPEVER MT52 Remote Meter is designed to work with EPEVER solar charge controllers that feature RS485 communication. It allows users to monitor the controller's real-time working status and program various parameters.

Key Features:

• Easy to install and operate.
• Real-time display of fault alarms.
• Locally reading of real-time parameters.
• Powered directly by the controller.
• Equipped with an RJ45 communication port.

Visual representation of the MT52's main features.

2. Important Safety Instructions

Please read and follow these instructions carefully to ensure safe operation and prevent damage to the device.

• Inspect the MT52 thoroughly upon delivery. Report any damage to the shipping company or manufacturer immediately.
• Read all instructions and cautions in this manual before installation.
• Keep the MT52 away from rain, direct exposure, severe dust, vibrations, corrosive gases, and intense electromagnetic interference.
• Prevent water from entering the remote meter.
• The remote meter contains no user-serviceable parts. Do not disassemble or attempt to repair it.

3. Installation

3.1. Frame Mount Dimensions

The following diagram illustrates the dimensions for frame mounting the MT52 remote meter.

Front and rear views of the MT52 with key components labeled.

Front and back views of the MT52 remote meter and its mounting frame.

3.2. Mounting on the Wall

1. Step 1: Locate and drill screw holes based on the frame mounting dimension of the base, and install the plastic expansion bolts.
2. Step 2: Fix the frame with four ST4.2×3 self-tapping cross recessed pan head screws.
3. Step 3: Use four M4×8 pan head screws to mount the MT52 panel on the frame.
4. Step 4: Mount the four associated screw plugs into the screw holes.

Illustrations for wall mounting the MT52 remote meter.

3.3. Mounting on the Panel Surface

1. Step 1: Locate and drill screw holes based on the installation size of the surface.
2. Step 2: Use four M4×8 cross recessed pan head screws with M4 nuts to mount the MT52 panel onto the surface.
3. Step 3: Mount the four associated white screw plugs into the screw holes.

Illustrations for panel surface mounting the MT52 remote meter.

Note: Take full consideration of the plugging/unplugging space and the length of the communication cable during installation.

4. Product Features (Physical Description)

4.1. Front View

Detailed front view of the MT52 remote meter, highlighting the display screen, failure indicator, communication indicator, and buttons.

4.2. Back View

Detailed back view of the MT52 remote meter, showing the RJ45 interface.

5. Operation

5.1. Buttons

The MT52 features six buttons: ESC, Left, Up, Down, Right, and OK. Their functions are described below:

Flowchart illustrating the operation of the MT52 remote meter's buttons for navigation and parameter modification.

• The default entry page is the browse mode.
• Press the OK button and input the correct password to enter modification mode.
• Use Left and Right buttons to move the cursor.
• Use Up and Down buttons to modify parameter values.
• Press OK to confirm changes and ESC to cancel.

5.2. Main Menu

Enter the Main Menu by pressing ESC. Use Up and Down buttons to select menu items, and OK or ESC to enter or exit pages.

Flowchart showing the main menu structure of the MT52 remote meter.

1. Monitoring
2. Device Info.
3. Test Operation
4. Control Para.
5. Load Set
6. Device Para
7. Device PSW.
8. Factory Reset
9. Failure Info.
10. Meter Para.

5.3. Real-time Monitoring

The real-time monitoring section provides 13 pages of data. Navigate using the Up and Down buttons to move between rows, and Left or Right buttons to move along a row.

First part of the real-time monitoring screens, showing charge/discharge energy and battery status.

Second part of the real-time monitoring screens, showing PV, controller, and load status.

5.4. Device Information

This page displays the connected controller's parameters.

Operational tips:

• Use Up and Down buttons to browse pages.

5.5. Test Operation

A load switch test can be performed to check if the load output is normal. This test does not affect the actual load settings. The solar controller will exit test mode upon exiting this page.

Operational tips:

• Enter the page and input the correct password.
• Use Up and Down buttons to modify the On/Off status.
• Press OK to confirm and ESC to cancel.

5.6. Control Parameter

Browse and modify the control parameters of the solar controller. Refer to the control parameters table for the scope of modification.

Flowchart illustrating the control parameter modification process.

5.6.1. Battery Type

Supported battery types include Sealed, Gel, Flooded, Lithium (LiFePO4, Li(NiCoMn)O2), and User-defined.

Note:

• When the MT52 is connected with different devices, the configurable battery types are listed in the table above. For detailed battery types and setting methods, refer to chapter 4.6 Control parameter in the full manual.
• Do not install the MT52 in a situation with strong electromagnetic interference.
• The MT52 comes standard with an RS485 communication cable (CC-RS485-RS485-200U). If connecting to a controller with a non-standard RJ45 interface, purchase an appropriate communication cable in advance.

5.6.2. Parameters of Batt. AH, Temp Comp. Coeff and Rated Voltage

Note:

• When the battery type is selected as a lithium battery, the "Temp Comp. Coeff" and "Rated Voltage" cannot be set. The software automatically enables the protection function of "Low temperature prohibits charge and discharge."

5.6.3. Battery Voltage Parameters (12V/25°C)

Double values for 24V systems, multiply by 4 for 48V systems.

Logic for User-defined Battery Voltage Parameters:

• Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Reconnect Charging Voltage.
• Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage.
• Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage ≥ Discharging Limit Voltage.
• Under Voltage Warning Reconnect Voltage > Under Voltage Warning Voltage ≥ Discharging Limit Voltage.
• Boost Reconnect Charging voltage > Low Voltage Reconnect Voltage.

5.6.4. Lithium Battery Voltage Parameters

For LFP4S, parameters under "User" battery type are 9~17V. Multiply by 2 for LFP8S, and by 4 for LFP15S/LFP16S.

Logic for User-defined Lithium Battery Voltage Parameters:

• Over Voltage Disconnect Voltage > Over Charging Protection Voltage (BMS) + 0.2V.
• Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage = Charging Limit Voltage ≥ Equalize Charging Voltage = Boost Charging Voltage ≥ Float Charging Voltage > Boost Reconnect Charging Voltage.
• Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage ≥ Discharging Limit Voltage.
• Under Voltage Warning Reconnect Voltage > Under Voltage Warning Voltage ≥ Discharging Limit Voltage.
• Boost Reconnect Charging voltage > Low Voltage Reconnect Voltage.
• Low Voltage Disconnect Voltage ≥ Over Discharging Protection Voltage (BMS) + 0.2V.

5.7. Load Setting

This page allows setting the four load working modes of the connected solar controller: Manual, Light on/off, Light on + timer, and Time control.

Flowchart showing the different load working modes and their settings.

5.7.1. Manual Control

5.7.2. Light On/Off

5.7.3. Light On + Timer

Diagram illustrating the Light On+Timer load control mode.

5.7.4. Time Control

5.8. Device Parameter

Check and modify the meter's model, software, and hardware version, as well as switch pages and backlight settings.

Note:

• The bigger the connection device's ID value, the longer the communication identification interval will be (maximum <6 minutes).
• For detailed instructions on device parameters, please refer to the relevant solar controller manual.
• To enter the language selection page, long-press Left + Up + Down + Right at the same time on any page.

5.9. Device Password

The solar controller's password can be modified via the device password page. This 6-digit password is required to enter modification modes for "Control parameter," "Load setting," "Device parameter," "Device password," and "Factory reset" pages.

Note: The default password of the solar charge controller is "000000".

5.10. Factory Reset

The solar charger controller's default parameters can be restored via the Factory reset page. This includes "Control parameter," "Load setting," "Charge mode," and "Device password." The factory default password is "000000".

6. Troubleshooting (Failure Information)

The solar controller's failure information can be checked via the Failure Information page (up to 15 messages). Once failures are resolved, the corresponding information will be automatically cleared.

7. Technical Specifications

7.1. RJ45 Pin Definition

Diagram illustrating the pin definitions for the RJ45 communication cable.

7.2. Appendix Dimensions

Diagram showing the overall and mounting dimensions of the MT52 remote meter (Unit: mm).

8. User Tips

• Compatibility Check: Before purchasing or connecting, always verify that your EPEVER solar charge controller model is listed as compatible with the MT52. Compatible models include LS-B, GM-N, VS-BN, Tracer-BN, iTracer-AD/ND, Tracer-BP, Tracer-CPN, Tracer-AN series, TRIRON, and XTRA-N series. If you have models like Epever Duoracer or MPPT Dual Battery DR2210N, confirm their RS485 communication and compatibility with the MT52.
• Cable Length: While the standard communication cable is 2m, the MT52 supports up to 50m. Ensure you use an appropriate cable length for your installation to avoid signal degradation.
• Password Security: Remember the default password "000000" for accessing modification modes. Change it if necessary for enhanced security.

9. Warranty and Support

Maintenance Procedure

If you encounter a fault, first refer to this user manual or contact after-sales personnel for troubleshooting. If factory maintenance is confirmed, send the product to the company via express delivery, prepay the shipping cost, and provide the purchase invoice as proof of warranty.

To facilitate quick warranty service, include the model number, usage environment data, and a detailed description of the fault with the returned product. This information is crucial for addressing your repair needs.

The manufacturer is not responsible for damages caused by improper use or failure to follow this user manual. Maintenance costs incurred during the process will be borne by the customer if the damage is due to misuse.

For the complete and official user manual, please refer to the PDF document: EPEVER MT52 User Manual (PDF)