Hi David.

Have you heard of or looked at VLUX. Telegram t.me@VLUXofficial https://vlux.io

Similar to power ledger with a practical working example of p to p energy transaction. They have an interesting model of not actually needing their token and only needed a smart meter to use the service but better and quicker transaction achieved through their own hardware, which also monitor you home appliances to report usage and degradation.

I'm thinking of investing and not in anyway affiliated with them, but thought you might want to check it out and see how they differ from power ledger.