Growatt or Solis, have their own applications to monitor your system.
Sometimes, we perform maintenance on the Otovo app, and you may experience issues with it not displaying production data.
If you have an inverter from Growatt or Solis, they have their own apps for monitoring your system.
Growatt's app, ShinePhone, can be downloaded here:
Solis' Solis Cloud app can be downloaded here: