I’m not so sure. Part of the idea of smart meter is remote access/control for the companies. All it needs to do is report the current IP when it sends a meter reading and that can be as frequently as every half hour.
But without port forwarding or UpNP, incoming connections wouldn't be allowed. The only dialogue allowed would be from and to the meter. The meter would need to initiate the connection.
Yes, possibly. Personally, I'd want to know a lot more about it before I allowed it.
My solar inverter connects to my network, as do most installations I would assume otherwise it wouldn't be possible to use the app to monitor them.
Yes, I'm aware that solar controllers use the Wi-Fi but the OP was initially talking about smart meters. Not heard of them using the Wi-Fi before.
It would appear that the OP is not in a good mobile signal area and company is offering to use the wireless connection through his Home network to the Internet as a way to over come this.
As long as the OP is happy with this, which appears to be, then there is really nothing more to say about it other than the company should ensure their fitters are trained how to make the wireless connection as well as what to do on dual band routers if the 2.4Ghz won't connect.
Quite so. Thank you