I work on the JSON API (I dare not call it REST) layer at Exelon. This is neat. Did you know we have some OpenAPI docs now? I saw you mentioned ComEd in another comment :)
Yeah so besides ComEd, I wouldn't think it would be too difficult to integrate with the other five opcos that Exelon owns because they all use the same api layer. This would double your number of energy customers from ~4 million to ~10 million ;) Of course, I have no idea what sort of arrangement you initiated with ComEd!
If not, I’d love to get a more accurate estimate from solar companies without having to fish around for my average usage.