Service Tip: SMA PUK – How to Regain Access to Your System Data

From on October 24, 2014 in Category Service with 8 Comments
SMA Service tip PUK

As promised in our previous post, we will be covering the SMA PUK (Personal Unlocking Key) in today’s service tip. We explain how your devices can be unlocked to restore normal access to your system data.


Before we get started, take a moment to make sure that you have really lost your password

Before anything else, you should check to make sure that you really can’t find the password for accessing your systems in the Sunny Portal. In a previous article called “Service Tip: Pay Attention When Assigning Passwords in the Sunny Portal,” we mentioned a number of circumstances that could result in your password being changed or overwritten.

If you’re sure you have lost your password, use this form to request a PUK from our Service Line. The PUK code does not come with your inverter.


How it works

Once your request has been received and processed by our staff, you will be able to unlock your inverter and set a new password via Sunny Explorer.


Exception: PV systems with Webconnect

In this case, contact our Service Line staff by phone to avoid permanent data loss.


Entering your PUK in Sunny Explorer

1. Open Sunny Explorer.

2. In the “User group” field, select the “Installer” user group.

3. Enter your PUK into the “System password” field.

4. Select [Next].
☑ Sunny Explorer displays the inverters in the plant tree without padlock icon.

5. Change the inverter password:
– Select the inverter in the system tree.
– Select the “Settings” tab.
– Select the parameter group “User Rights > Access Control”.
– Select [Edit].
– Assign the password you want to the relevant user group.

6. To unlock additional inverters with a PUK:
– Select Options > “Change user group.”

7. Unlocking additional devices one after another with a PUK:
You will need to wait about five minutes between each device, since the passwords need to be sent to the system first.
After waiting five minutes, simply repeat the steps in step 5 in order to unlock the next device.

8. Final step: Set a general system password. This system password will be set as the installer password on all the individual devices and will guarantee access to the entire system so that all modules can be accessed at the same time.


Screenshots showing an overview of these steps





For more information on how to use Sunny Explorer, please refer to the User Manual: SUNNY EXPLORER System Monitoring.

We hope this post will make it easier for you to complete the steps required in order to unlock devices with your PUK. If you have any additional questions, please feel free to add a comment or contact our Service Line staff.


4.75 avg. rating (94% score) - 4 votes

The Author


My tasks:
Creative mind in Service Marketing. Brochures, customer correspondence, and web texts come from my desk.
My topics:
SMA service topics. For example insights into SMA customer service and service product management or tips for your daily work.
And I’m interested in hearing your opinion. What services can we offer you to provide you with even better support?
What even my colleagues don’t know about me:
I was the school high jump champion at a height of just 1.60 meters (5’2”).


Related Posts


  • avatar

    Gordon Geritz

    July 11, 2017 at 03:41

    I have 1.5/2.5 sunny boy inverter. I cannot coonect to computer. Passwords do not work. I think I made an error setting up the password. How do I get A PUK? I live in Queensland, Australia.

    Reply »
    • avatar

      Carolin Rost

      July 11, 2017 at 08:21

      Hello Gordon,
      Please contact our Service Line in Australia. The number is 1800 762 287 (toll free for Australia) or +61 2 9491 4200. You can also send an email to The colleagues in our subsidiary in Australia will help you.
      Kind regards, Carolin

      Reply »
  • avatar

    Alastair Wilson

    April 25, 2017 at 19:09

    Hi, I’m pretty certain I am using the correct passwords but I am unable to access my SB 3600TL-21 to retrieve and data in Sunny Explorer. I am using the integrated bluetooth in my Dell Inspiron laptop and it says that it has a good connection. Thanks

    Reply »
    • avatar

      Viktoria Mai

      April 28, 2017 at 08:09

      Hello Alstair,

      please turn to our service line, which will help you specifically. On this page you will find the right number (at the bottom of the page) for your country.

      Kind regards,

      Reply »
  • avatar


    November 8, 2016 at 02:08

    Dear SMA,
    How to read the inverter in cluster controller if every device show in display is lock?


    Reply »
  • avatar

    Stuart Leggat

    March 17, 2016 at 16:48

    I am just off the phone to one of your technical team who advised me to request PUK codes as we cannot access data for one of the inverters on Sunny Portal and it looks like a password issue. He suggested we would require a code for each of the inverters.

    Site Address Park Farm

    Serial Numbers

    STP 20000 TL 30 1900719065
    STP 25000 TL 30 1900718317

    Can you please assist


    Stuart Leggat
    EH6 7BD

    Reply »
    • avatar

      Julia Stunz

      March 18, 2016 at 08:28

      Hello Stuart,
      I will send you a document via email, that you have to fill in and send back to SMA UK (


      Reply »
  • avatar


    January 22, 2016 at 21:56

    Don’t buy this product, no way, I bought sunny boy 1,5/2,5 and configured by Veissmann company, do you know what! I’m just user and I can’t change any configuration as user but I see what how much I got and saved money, and do you know what! The data what I am getting it monthly is not correct 100% and if you want to change your Wifi password the system will not read it so the SMA Solar company not give the authorities to configure your inverter as Installer but user because you didn’t got course and training in them branches so you have inverter but you guest in it as user and they control it by them branches and if you want to change the password for configuration as you forgot it, hhhhaaaaa they will ask for PUK number and for sure they have it 😀 and you will pay € 15 Basic + € 3.50 per device, and do you know what! They will send you PUK number as user 😂 guys think twice before you will stuck like me what will save it by solar panels will give it for service👎🏻

    Reply »

leave comment

 Maximum comment length