Eastron Meter - SolisCloud Export and Import Discrepancies

Modified on Thu, 02 May 2024 at 10:19 AM

If you wish to download this article as a PDF, please scroll to the bottom of the page or click HERE. 

Share this article:

Share via Email

Understanding SolisCloud Export and Import Discrepancies 

The Eastron Meter Solution



In the world of solar energy and smart grids, SolisCloud serves as a vital tool for monitoring, tracking, and optimizing energy consumption and generation. However, users occasionally encounter unexpected discrepancies in total export and import values. 

In most cases, the cause of these discrepancies can be attributed to the way the meter accompanying the inverter functions. It's important to recognize that the meter received with the inverter is not a "balanced" meter. This article explores why this issue occurs and introduces a solution provided by Eastron Meter through a firmware update.

Table of content 




Understanding the Problem 


Imagine the following scenario: A customer feeds 1 kW into the grid in phase 1 and simultaneously imports 1 kW from the grid in phase 2. In such cases, the household meter will display 0 kW. However, unlike the household meter, the Eastron meter sums both values without signs and transmits them to SolisCloud. This discrepancy results in the total export/import values for the customer being incorrect.





The Solution: Eastron Meter Firmware Update


Fortunately, there is a solution to this problem, and it involves performing a firmware update for the Eastron Meter. This update ensures that the meter sends the correct information to SolisCloud, thus displaying the accurate values of energy generation and consumption. 


To carry out this firmware update, you will need the following:


1: Windows PC

On the PC, Microsoft Visual C++ 2013 Redistributable (X86) must be installed. The 32-bit version (X86) must always be installed, even on a 64-bit system. 

You can download the file from here: https://www.microsoft.com/de-de/download/details.aspx?id=40784

The filename is vcredist_x86.exe.RS485 USB converter – for example


2. RS485 USB Converter

For example:

Waveshare 17286 https://www.waveshare.com/usb-to-rs485.htm

or Waveshare 22456 https://www.waveshare.com/usb-to-rs485-b.htm

A black usb device with green connectors

Description automatically generated

3. Data cable for the RS485 connection

For example, telephone cable, utilizing three wires.


4. 230V supply for the meter



5. Update file

You will find the update file at the bottom of this article.

You will receive the update software as a compressed ZIP archive. 

Unzip the file on your PC.



Performing the Firmware Update

Here are the steps to perform the Eastron Meter firmware update:


1:  Connect data connection and power supply


Establish a data connection between the Eastron Meter and your PC using the RS485 USB converter and the data cable.


On the meter side, use pins 12, 13, and 14 for the RS485 connection (see image) 


PIN 13: RS485 B

PIN 14: RS485 A


IMPORTANT: To perform the update, ensure that the meter is powered.

A screen shot of a machine

Description automatically generated




Note the schematic diagram provided and use PINS 5 & 6 for the power supply of the meter.

After powering on, the meter will display a software version during the startup phase, for example, CX0335.


A diagram of a voltage testing

Description automatically generated with medium confidence




2: Open the Update Software on your PC


Navigate to the "Upgrade Software" folder and open the "flash_updata.exe" file located in the "EXE" folder.

A screenshot of a computer

Description automatically generated



3. Set the parameters for the serial interface


Select the correct COM port.

Baud rate ("Baud"): 9600

Stop bit ("Stop"): 1

Parity bit ("Parity"): None

After setting the parameters, click "Open COM".


A screenshot of a computer

Description automatically generated




 4. Select the upgrade file

Click on "Open File" to choose the upgrade file.

In the "Upgrade File" folder, you will find the file "SDM_630MCT_40MA_23_03_13_CX_0385.bin". Select this file.


A screenshot of a computer

Description automatically generated


5: Perform the Upgrade:


A screenshot of a computer

Description automatically generated


Make sure that the meter is powered on at this time and connected to the appropriate COM port of your PC via the RS485 communication tool. Then click on "UPDATE" to start the update process. During the update process, you will see a progress bar. The backlight of the meter will turn off, and the LED will remain lit continuously. Once the progress bar reaches 100%, the update is complete, and the meter will automatically restart.


A screenshot of a computer

Description automatically generated




Upon restarting the meter, the software version should again be displayed, and it should now read CX0385.


A close up of a screen

Description automatically generated



6. Set meter connection mode

The four buttons of the meter can be used in the settings mode for menu navigation.

To enter the settings mode, press and hold the "E" (Enter) button for at least 3 seconds. Then, the password must be entered.


A close-up of a digital display

Description automatically generated


The password is "1000". Press the "M" button briefly to enter the password. Then, once again, press and hold the "E" button for at least 3 seconds. You will then enter the settings menu.


Using the "M" and "P" buttons, navigate through the menu items. Press the "P" button until "SYS" appears on the display. Here, you can adjust the power system, i.e., the connection mode of the meter.


A screen with numbers on it

Description automatically generated




Now, press and hold the "E" button again for at least 3 seconds. You can now select the power system. Press the "P" button repeatedly until "PV" appears on the display. Then, once again, press and hold the "E" button for at least 3 seconds to confirm the setting.


When "Good" appears on the display, the setting has been successfully saved. You can now exit the settings menu by pressing the "U/I" button. The meter update is now complete. Turn off the power supply of the meter and disconnect the data connection. Then, you can turn the meter back on, and it is now ready for operation.


A screen with numbers on it

Description automatically generated







In conclusion, we hope this article has been helpful in providing valuable insights and information. 

Your feedback is important to us, and we encourage customers to reach out with any comments or suggestions to improve our content. 

Should you encounter any difficulties or have specific questions, please don't hesitate to contact Solis Support for dedicated assistance. We are committed to ensuring your experience is seamless and your concerns are addressed promptly. 

Thank you for choosing us, and we look forward to serving you better in the future.


Connect with Solis


LinkedIn Facebook Instagram YouTube Twitter

Was this article helpful?

That’s Great!

Thank you for your feedback

Sorry! We couldn't be helpful

Thank you for your feedback

Let us know how can we improve this article!

Select atleast one of the reasons
CAPTCHA verification is required.

Feedback sent

We appreciate your effort and will try to fix the article