I've been saving all the .apk files for apps I find valuable, just in case this ends up impacting future GrapheneOS builds.

Worst case scenario, at least I'd be able to use a saved Pixel for the apps I want, without needing a Google account.

There's a product called the GoSun EV Solar charger, which also promises to add 20 miles of range in charging daily. It's on preorder, and I'm waiting until reviews come in before buying it myself, but I'm hopeful.