I love the aesthetic! Great work.
Here's my unsolicited design riff on the "battery indicator." I'm a fan of the concept, but the 100vw element width of the yellow fill was distracting me from the rest of the content. I used DevTools to mock up a narrow version which fits within the right content gutter, right next to the scroll bar. I had to tweak the percentage metric display a bit by stacking the sun above the value and removing the "%" indicator, but feel the end result has increased readability and is still understandable.