homeassistant

Getting it up & running is just loading their software onto a Pi SD card, so easy

I recall there was a bit of a faff learning how it creates "feeds" from sensor data - it's just different, not complex, but took a couple of attempts to get it how I wanted it (which included some calibration of the sensors... I recall it was reporting a few W of solarpower at night)

But... since then it's been running for years with a few updates, so really stable.

Then HA came along, and there's an integration that pulls the data in, so I can see grid & solar power...

Perhaps I wasn't clear at the beginning though - I don't have batteries (yet...), so I'm not montioring that, but I am presume it would be a similar process. I just didn't want you to purchase something without checking it fits your exact needs first.

Have a search / post on their forum, they're really friendly there and someone might have already discussed this...