It's a dashboarding system. It's good because if you're doing energy management, people like yourself don't pay millions of pounds or dollars just to see your energy usage. That's why all the systems are free. You just log on, and although you have to accept what they provide, it's sufficient.
When you want to get into that type of market, cost is a big driving factor. Then, there are things like Node-RED, which are free. You can go on there and do everything you want: dashboards, even reporting. I can do my bulk reporting through Node-RED, using it as the enterprise version. I suck the data out, customize my reports, and do a bulk run—all free.
Grafana itself has a number of third-party interfaces, and it depends on which one you choose. It's just a dashboard system. You've got to write your own database access. I found one with an Indian guy in England who's made the interface very simple and easy.
You can write queries and do a lot of stuff that the standard tools can't do because people get data in JSON and XML, and many of these things are very specific and very expensive.