As the title states, everything electrical suddenly lost all power. No fuses appear to have blown. Any ideas? I lost what I typed out before because I'm using janky public wifi with my laptop. Will add more in a few.

 

I guess I can't edit my post. The van has 116k and is in nice shape. Everything worked fine for the most part and no CEL has been on. The key fits and works in the ignition like normal. The shifter doesn't need to be wiggled to start it. I don't think the problem has anything to do with the ignition switch or the shifter interlock. I did notice two electrical things that happened not long ago. A few times the instrument cluster illumination lights would flicker on a few times during the day. The second thing was that the shifter didn't work the other day at first after driving to the store. No gears could be selected. A shut off and restart solved that at the time. It's very hot out here. Maybe a heat soak issue?

 

I would start at the battery connection and look for a corroded connection. Might be power side or ground. With everything out it'll probably be some major connection if that's the problem. A car that's 15 years old can get corrosion anywhere especially if it's a salt air environment.