Wednesday, June 3, 2020

Epever , Epsolar technology

What is GoMate

Posted On : Tuesday, March 12, 2019

Introduction of EPEVER GoMate Series Flush mount solar charger

Different types of charge controllers were discussed in previous articles, mountable solar chargers are among the most interesting topics in practical applications. So in this article EPEVER GoMate series Flush mount solar charger will be introduced for desired applications.

The GoMate is a negative-ground, flush mount solar charge controller, designed for an aesthetically clean and integrated look on RV and Vessel, also included surface mount cover to suit personal preference. The GoMate adopts a highly efficient PWM charging mode, also comes equipped with a special LCD display to show the real-time operating status of the system. This charge controller is fully controlled automatically, which provides a simple usage pattern to users.

Let’s discuss the priorities of GoMate series flush mount solar charger which makes this kind of charge controllers proper choice for a variety of practical applications, here are some of these prominent priorities:

  • Less space occupation
  • Seamless decoration
  • Clean and convenient wiring
  • Flexible mounting possibilities
  • Secure protection of equipment 


Figure 1- EPEVER GoMate Solar charge controller

Features of EPEVER GoMate Series Flush mount solar charger

In this section, we will introduce some of the prominent features of EPEVER GoMate series flush mount solar charge controller.

  • Flush mounted and embedded installation design.
  • High quality and low failure rate components (ST/IR) to ensure the product lifetime.
  • 3-Stage Intelligent PWM charging: Bulk, Boost/Equalize and Float.
  • Battery Type: Sealed, Gel, Flooded, and User.
  • Real-time energy statistics feature.
  • Battery temperature compensation feature.
  • Digital LCD monitor for informative display of operational parameters and fault messages.
  • Voltage drop and temperature compensation sampling interface design.
  • RS485 communication port with Modbus protocol, and short circuit protection for 5V/200mA power supply.
  • Multiple communication peripherals.
  • Rated charging current at working temperature without de-rating.
  • Extensive electronic protections.
  • Monitor and set the parameters via PC software or APP.


As we discussed earlier, GoMate series charge controllers adopt the pulse width modulation (PWM) technology which was introduced in detail by previous articles. In this kind of charge controllers batteries are charged by continuous pulse waves created by GoMate series controller.


Figure 2- PWM technology for GoMate series charge controller


Structure of the EPEVER GoMate Series Flush mount charge controller

Let’s discuss the structure of mountable GoMate series charge controllers, various ports and buttons are employed to demonstrate prominent features of these charge controllers, also optional accessories can be utilized to enhance the controllers’ performance which will be introduced by later sections. Naming rules for GoMate series charge controllers are emphasized to help the customer to choose the proper controller type for practical applications.



 Controller case
 Battery terminals
 MENU button
 PV terminals
 SET button
 Remote temperature sensor port
 RS485 communication port
 Mounting hole size Ø 4.5mm
 Remote battery voltage sensor port


(1) The controller will charge the battery at 25℃ as default and no temperature compensation when the temperature sensor is damaged.

(2) The port can detect accurate battery voltage (a 2P/1.5mm2 wire (Red+, black-) with insulation protection is suggested). One end connects the 5.08-2P terminal to insert port, the other end connects the battery, and make sure the “+” and “-” poles are connected correctly.




Now in this section, various useful accessories that are included in EPEVER GoMate series flush mount charge controller will be introduced. Some of these accessories are optional and can be connected to the charge controller to employ astonishing features of the GoMate series flush mount charge controller.


Included Accessories:

1. Local temperature sensor (Model:RT-MF58R47K3.81A) 

The temperature sensor is employed to control the charge process and temperature of the system to avoid overheating and also proper operation in cold climate conditions.

2. 5.08-2P Terminal 


Optional Accessories:

1. Logger (Model: eLOG01) 

After the controller is connected with the eLOG-01 through the RS485 communication cable, it can record the operating data of the controller or monitor the real-time operating status of the controller via PC software.

2. Remote temperature sensor(Model:RTS300R47K3.81A) 

Acquisition of battery temperature for undertaking temperature compensation of control parameters, the standard length of the cable is 3m (length can be customized). The RTS300R47K3.81A is connected to the port (❹) on the controller.

3. USB to RS485 converter cable (Model:CC-USB-RS485-150U-3.81) 

It used to monitor each controller on the network via PC software. The length of the cable is 1.5m. One of the terminals is connected to the ❽ port of the controller, the other terminal is connected to the PC.

4. WIFI Serial Adapter (Model: eBox-WIFI-01) 

The operating status and related parameters of the controller can be monitored by the mobile APP through WIFI signals. So, eBox-WIFI-01 is connected to the controller through standard Ethernet cable for proper monitoring by mobile devices.

5. RS485 to Bluetooth adapter(Model:eBox-BLE-01) 

EBox-BLE-01 is also employed for remote monitoring of the status of the system by mobile devices while EBox-BLE-01utilizes Bluetooth protocol to connect the EPEVER DuoRacer charge controller to the mobile device.


6. Remote Meter (Model:MT50) 

MT50 displays various operating data and fault info in the system. The information can be displayed on a backlit LCD screen, the buttons are easy-to-operate, and the numeric display is readable.



Despite XTRA and DuoRacer charge controllers, GoMate series are flush mount controllers, so the installation of these types should be noted. In this section, several steps for proper installation will be discussed. Heat dissipation and location of the controller are important parameters for utilizing the GoMate series controllers. Now let’s discuss the steps:

1) Determine the Installation Location and heat-dissipation Space

Determination of installation location: The controller shall be installed in a place with sufficient airflow through the radiators of the controller and a minimum clearance of 150 mm from the upper and lower edges to ensure natural thermal convection.

2) Determine the size of Installation Location (158*96mm)



3) Cut out the section (158×96mm)

4) Mark holes and drill holesφ3.5mm×4



5) Secure the controller



6) Install the control case



Now proper wiring of elements for GoMate series charge controller will be discussed. Step by step instruction for wiring and block diagram of GoMate series charge controller is demonstrated in this section.

1: Connect the battery

2. Connect the PV

3. Connect the Remote temperature sensor cable

4. Connect the Remote battery voltage sensor

5. Connect to PC via RS485 communication port


The battery parameters such as temperature, voltage level, current level and energy besides the battery type can be monitored by the LCD display of the GoMate series flush mount solar charger which the details and instructions of LCD features are referred to the instruction manual of the product which can be found in the EPEVER website.

Remote monitoring of parameters can be achieved by optional accessories which were discussed in the previous section. These accessories make it possible to connect the charge controller to the PC or mobile device to real-time proper monitoring of charge controller parameters. The figure below is employed to demonstrate this ability.



Download software —— Solar Station Monitor —— Charge Controller (Sealed)

Only Sealed, Gel and Flooded via the LCD, The battery type of User can be set via the PC software, APP software, and MT50.


System Status Icon



Technical Specifications

1. Electrical Parameters



Nominal System Voltage

12/24VDC or Auto

Battery Input Voltage Range


Rated Charge Current


Max. PV Short Circuit Current


Max. PV Open Circuit Voltage


Battery Type




Temperature Compensate Coefficient


Charge Circuit Voltage Drop


★The battery type of User can be set via the PC software, APP software, and MT50.



Example for 12V Battery:

Battery voltage=12V

Isc=9.18A                charging power=voltage*current=12*9.18=110.16W

                              Power loss= 320W-110W=220W

Example for 24V Battery:

Battery voltage=24V

Isc=9.18A                charging power=voltage*current=12*9.18=220.32W

                              Power loss= 320W-220W=100W


2. Environmental Parameters

Storage Temperature Range


Working Environment Temperature

-20+55(100% input and output)

Relative Humidity

≤95%, N.C.




Common negative



Pollution Degree



3. Mechanical Parameters

Dimension (L×W×H)


Mounting dimension


Mounting hole size




Recommended cable


Net Weight



Lead-acid Battery Voltage Parameters






Over Voltage Disconnect Voltage





Charging Limit Voltage





Over Voltage Reconnect Voltage





Equalize Charging Voltage





Boost Charging Voltage





Float Charging Voltage





Boost Reconnect Charging Voltage





Low Voltage Reconnect Voltage





Under Voltage Warning Reconnect Voltage





Under Volt. Warning Volt.





Low Volt. Disconnect Volt.





Discharging Limit Voltage





Equalize Duration





Boost Duration







(1) When the battery type is sealed, gel, flooded, the adjusting range of equalizing duration is 0 to180min and boost duration is 10 to180min.

(2) The battery type of User should follow the rules as below when modifying the value of parameters in user battery type (factory default value is the same as sealed type):

a. Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Reconnect Charging Voltage.

b. Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage

c. Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage ≥ Discharging Limit Voltage.

d. Under Voltage Warning Reconnect Voltage > Under Voltage Warning Voltage ≥ Discharging Limit Voltage.

e. Boost Reconnect Charging voltage > Low Voltage Disconnect Voltage.

As the last part of the article, we will introduce some of the important protection features which is available in GoMate series flush mount solar chargers:

  • PV Overcurrent
  • PV Overvoltage
  • PV short circuit
  • PV Reverse Polarity
  • Night Reverse Charging
  • Battery Reverse Polarity
  • Battery Overvoltage
  • Battery Overheating
  • Controller Overheating
  • TVS High Voltage Transients

By the help of these features we can protect the charge controller from external damages, so GoMate series flush mount charge controllers can be employed in any climate conditions since safe operation goal is achieved by the charge controller.


Have questions or inquiries?

If you have any questions about the price or technical aspects of the product, feel free to contact us!

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