This video is quite interesting! If you're short on time and can't watch the whole thing, then I would definitely recommend watching at least the first 3-4 minutes to get an idea about the current progress with Solarcoin.

Here are two excerpts:

"… it's a solar energy reward system, now given out in 39 countries. It's a very small community at this point, a couple thousand people. That's probably gonna change in the next couple of months and quarters in that we have some very early conversations with some of the world's largest solar energy monitoring companies and distributors, etc."

"... our back end software is slow and clunky, and so we haven't been actively marketing. We're going to hit an inflection point. We talk to one of these large monitoring companies, and then we are going to reach out. And so we are basically going to go from 0 to 100 in Tesla speed. What I mean by that is we've got monitoring companies, some global ones, that have combined between over 5-600,000 installs. We've had inbound requests from somebody that represents 13% of US solar energy. So, right now, a small community, a couple thousand people, we're hanging out, early adopters into it. That's going to change and I think in a really interesting way."