I haven’t read anything political on there. Why is wanting to reduce energy consumption „political“. It’s just plain old frugalism mixed with environmental concerns.

Because if you actually wanted to reduce energy consumption, then you'd have actual targets and goals. E.g. I started out at n mW and now I'm at m mW of usage. This article talks about the solar setup they're using now, but not where they started from, and what the energy usage profile of their server is over time. In other words, it's either lazy or greenwashing.