Add your inverter's IP, and pvoutput.org SID and API key to config.py.
Setting a static IP on your inverter is useful.
Pushes AC voltage up to pvoutput
/path/to/script/fronius_api_to_pvoutput/ac_voltage.py
Run every 5 minutes via cron (4am to 10pm - should catch all the daylight):
*/5 4-22 * * * /path/to/script/fronius_api_to_pvoutput/ac_voltage.py
Remember pvoutput API rate limiting (currently 60 req/hr): https://pvoutput.org/help/api_specification.html#rate-limits