Kostal Solar PIKO-Inverters (Shodan search), versions 3.0, 3.6, 4.2, 5.5, 7.0, 8.3, and 10.1 contain default admin credentials for the web interface according to the manual.
7.2.1 Connecting to the web server of the inverter
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Enter user name and password. The factory defaults for user name and password are set as follows:
User name: pvserver
Password: pvwr
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