Top installer FAQ
Disclaimer
The material in this document has been prepared by Sungrow Australia Group Pty. Ltd. ABN 76 168 258 679 and is intended as a guideline to assist solar installers for troubleshooting. It is not a statement or advice on any of the Electrical or Solar Industry standards or guidelines. Please observe all OH&S regulations when working on Sungrow equipment.
Firmware:
All firmware must be updated as part of the commissioning (Dongle, inverter, and battery).
Updating the firmware should also be the first port of call to resolve issues.
- Updating firmware via the App: https://youtu.be/8kJAa0nLgBk
If an update doesn’t resolve an issue, try the solutions below.
Sizing the AC Cable (Hybrids):
Because the AC cable has to carry both the Backup load current, plus the battery forced charge from grid, in the case of it being night time (no solar) and depleted battery, the full current will come from the grid, through the inverter.
All data sheets show “Max power from grid”. For example:
AC cable will need to be rated to carry at least 52 Amps.
WiFi FAQ:
- If you have lost communication with internet/modem (Winet-S), click the following video link: https://youtu.be/sLH6rAWojcI
- How to test for signal strength: https://youtu.be/lZf-zUoMUFc
Battery FAQ:
- Check Communication cable (SBR): https://youtu.be/3qD09fryBRs
- Battery Augmentation (Add new modules) for SBR battery – Equalise SOC%: https://youtube.com/shorts/2EgJN6OqMFQ?feature=share
- Storm button/Emergency charge (end users): https://youtube.com/shorts/clmjh9I93KQ?feature=share
- Testing SBR battery voltages: https://youtu.be/HxdGRFGb5dY
- How many batteries can be connected to inverter? https://service.sungrowpower.com.au/New%20knowledge%20base%20file/GD_202506_SBR%20and%20SBH_Cross%20Reference%20Chart_V2.2%20Update%20for%20new%20T%20series-1-.pdf
- Battery not charging or discharging/ Discharging when it shouldn’t: Is the VPP or forced charging enabled?
Meter FAQ:
- RS485 and communications, click here: https://youtu.be/pB_C-kNrctI
This icon shows a DTSU666-20 is talking to the inverter:
- Setting the CT ratio (DTSU666-20): https://youtu.be/GiqMZ6SiFfQ
- Incorrect meter readings - Refer to the Full meter training webinar here: https://youtu.be/xsFt3SL3CLM
- Current Transformers Selection requirements: link
Error 38:
Error 38 means the changeover switch has been wired incorrectly and the grid is back-feeding into the backup port of the inverter: https://youtu.be/b8i28vRggzA
Error 106 (Hybrids):
Error 106 normally means that the chassis of the Hybrid inverter has not been earthed correctly:
If solar production is low:
In most occasions, the MPP voltage range for full power has been exceeded. Please refer to the appendix on the install manual. Example below:
Backup not working:
- Enable the backup, and set the battery reserve capacity:
- Overload - Check that the backup has not been overloaded i.e. SH10RT backup is 10 kW / 3 phases = 3.3 kW per phase (14.3A): Guide here