Ontario Canada will be able to pull their data from Green Button

We’ve fully integrated with Green Button over at Electrify613.ca to help with some tools we’re building. If there’s a way to load in historical usage into home assistant, it would be doable to get previous day hourly usage. The billing data used to be ingested overnight in a batch job as it’s delivered in bursts from the meters.

It doesn’t seem reasonable that everyone that wants to pull their own data should have to onboard as a partner though, hence why having a third part service act as the broker and make the data available to you. There is unfortunately no ability within green button to get realtime data.