How to change settings of inverters behind the PELD
Helios has the feature that gives users more control over inverter settings even when the inverter is behind a PELD.
PELD requires firmware version higher than 6
To use this feature, your PELD must be running firmware version > 6.
If your firmware is smaller or equal 6, you will see a message prompting you to update it before proceeding.
Activate the transmission switch under PELD settings
When an inverter is behind a PELD, the PELD controls its settings by default.
To make changes:
-
Open Digital O&M in Helios
-
Go to PELD settings
- Locate the transmission switch setting

-
Change option to ON to temporarily stop the PELD from controlling the inverter
⚠️ You will be clearly notified about the current status of the switch (ON or OF)
Once transmission switch Is ON, you can change inverter settings
With the transmission switch ON:
-
You now have full access to the inverter’s settings
-
You can proceed with the configuration or updates needed
💡 If settings fail to save, possible causes include a poor connection or the switch being OFF again, check both before retrying.
After changing settings, don't forget to turn the transmission switch OFF
Once you finish changing inverter settings:
-
Switch the transmission switch back to OFF
🚨 Important: Leaving it ON means the PELD will not resume control of the inverter, which can lead to unintended behavior.
You will see a prominent warning banner in Helios reminding you to toggle it OFF when done.