For those who are looking for something similar but (being the kind of people who read HN) would like something more configurable and hackable, you might check out the products of Victron Energy[0]. They've also have an optional remote management portal[1] which allows you to set up and monitor everything remotely for years now, and most the software running locally on the devices is open source and fully modifiable (such setups are even supported!).

Full disclosure: I'm one of the developers of the mentioned Remote Management portal.

[0]: https://www.victronenergy.com/ [1]: https://vrm.victronenergy.com/