Related to this topic, some research results about cybersecurity of solar inverters:

https://github.com/veganmosfet/Balcony_in_the_cloud

https://github.com/veganmosfet/SolarFlareSec

https://github.com/veganmosfet/CyberEclipse

https://github.com/veganmosfet/SecureWatt

A big mess, but it's getting slowly better...