This website has 81% battery power remaining
I think this also shows how inefficient modern website hosting is. The fact that this person was able to get a raspberry pi to host the #1 website on HN powered by a small 50 watt solar panel is very cool (meaning maybe 10w average power budget), but also shouldn't be as uncommon as it is today. To put this in perspective, a modern server uses 50-100 watts idle doing nothing, and many more under load. To handle the top of HN, the developer probably would use load balancing and other tech, multiplying the power usage accordingly.
Edit: fixing typos.