TSUN App Guide: Inverter WLAN Setup & Firmware Update

Release time 2026 - 05 - 14

TSUN App Guide: Inverter WLAN Setup & Firmware Update

Getting your balcony solar system physically installed is only the first step. To monitor your real-time energy production, unlock advanced features, and ensure your system runs at peak efficiency, you need to connect your hardware to the TSUN App. This comprehensive guide will walk you through the preparation, the exact steps to set up your network (tsun wechselrichter wlan einrichten), how to perform firmware upgrades, and how to troubleshoot common connectivity issues.

Preparation: Download the Latest TSUN App

Before touching your inverter, ensure you have the correct and most up-to-date software on your smartphone.

Download the App: Search for "TSUN Smart" in the Apple App Store or Google Play Store. Ensure you download the official app (version V1.0.18 or higher is recommended for full smart meter compatibility).
Create an Account: Open the app and register using your email address.
Note: If you are not receiving the verification code, please check your spam or junk mail folder first. If it is still missing, contact our support team with your email address for manual activation.
Enable Phone Permissions: For a successful connection, you must temporarily allow the TSUN App to access your phone's Bluetooth and Location Services.

Step 1: TSUN Wechselrichter WLAN einrichten (WiFi Setup)

Connecting your microinverter to your home network is crucial for monitoring your daily energy yield. Follow these steps carefully:

⚠️ CRITICAL: The 2.4GHz vs. 5GHz Rule

Like most smart home devices, TSUN inverters only support 2.4GHz WiFi networks (this frequency penetrates exterior walls much better than 5GHz). If your router broadcasts a mixed or "Smart Connect" signal where 2.4GHz and 5GHz share the same name, the connection will likely fail. You must access your router settings and split the networks into two distinct names (e.g., "HomeNet_2.4G" and "HomeNet_5G") before proceeding.

Ensure the inverter is receiving DC power (the sun must be shining on the solar panels).
Stand within 3 meters of the inverter with your smartphone.
Open the TSUN App, log in, and tap the "+" icon in the top right corner to add a new device.
Scan the SN (Serial Number) barcode located on the inverter's nameplate.
Follow the on-screen prompts to enter your 2.4GHz WiFi password. The app will pair your phone, the inverter, and your router via Bluetooth before establishing the permanent WiFi link.

Step 2: Performing a TSUN Wechselrichter Update

Just like your smartphone, your microinverter requires occasional software updates. A tsun wechselrichter update can introduce new features (like unlocking output power from 600W to 800W or 2000W), improve grid stability, and patch communication bugs.

How to check and execute an update:

Ensure your inverter is online (indicated by a solid or flashing green LED, and showing as "Online" in the app). Updates can only be performed during daylight hours when the unit is powered by the sun.
Navigate to the [Devices] tab in the TSUN App.
Select your specific inverter and go to the [Settings] or [Device Information] menu.
Look for the Firmware Update option. If a new version is available, a red dot or notification will appear.
Click Update. Do not close the app, turn off your router, or disconnect the solar panels while the progress bar is loading. The inverter will automatically reboot once finished.

Troubleshooting: Common Network & App Errors

If you encounter issues during setup or daily use, review this quick troubleshooting guide to resolve the most common faults instantly.

Q: Why does the network configuration keep showing "failed"?

Please ensure Bluetooth and Wi-Fi are enabled on your phone, and stay within 3 meters of the device. Verify that your router is broadcasting a strict 2.4GHz signal. If it continues to fail after a router change, try using another smartphone as a mobile hotspot to isolate whether the issue is with the inverter or your home router.

Q: Why does the App say "The serial number is not recorded in the system"?

This usually happens if the wrong App is used for older models, or if the unit has not been logged in the regional database yet. Please take a clear photo of the device nameplate and submit it to our support team so we can identify the correct software version for you.

Q: What should I do if it says "Device added to other plants" or is "already bound"?

For security reasons, an inverter can only be tied to one account. If you purchased a second-hand unit or created a duplicate account, please provide the SN code and your proof of purchase (invoice) to our support team. We will manually unbind the device from the previous account for you.

Q: My App is crashing or showing no data. How can this be fixed?

First, ensure you are using the latest version of the TSUN Smart App from the App Store. If the app is up to date but data is missing, provide your SN code to support. We will perform a remote firmware upgrade on your inverter to stabilize the system communication.