Please try the following:

This issue can occur in the following conditions:

1. The version of the app or Solarbank E1600 is relatively old: If this is the case, upgrade the app to the latest version, and then upgrade the Solarbank firmware to the latest version.

2. The photovoltaic panel is operating improperly: Only connect Solarbank E1600 to the photovoltaic panel and not to the microinverter. Then, press and hold both buttons on Solarbank E1600 for 15 seconds to restart it until the indicator flashes. Now, if the photovoltaic panel is operating properly, it will be slowly charged at a power of 35 W. If there are any abnormalities, check whether the cable of the photovoltaic panel is damaged and whether the wires connected to Solarbank E1600 are the correct ones and are secure.