Is there another way I could do that?,and would it stop feedback to grid?
The inverter has 2 “components” to it, the inverter itself (accessed via the front screen/buttons) and the datamanager card, which provides the wifi interface and solar web integration.
As far as I know, resetting the inverter will not reset the datamanager card settings.
To access the datamanager directly (which will temporarily not prompt for a user/password) use the following process:
Turn off your inverter via the appropriate shutdown sequence,
take the lower front dark grey cover off
locate the datamanager card (will have a wifi antenna connected to it) and with a laptop plug an ethernet cable in the LAN socket (not the red solarnet sockets)
there is a group of 4x LED's – with them is a small white switch, move it to "position A"
Turn on your inverter, wait for it to boot and then open a web browser and enter 169.254.0.180 into the address bar
you can now access the settings menu without logging in – which also allows you to reset the admin/service password at the same time.
shutdown the inverter again, via the appropriate shutdown sequence, move the small switch back to "position A", disconnect your laptop and replace the covers
Turn your inverter on, wait for it to boot and try logging into the inverter from your WIFI with your new admin password.
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