Electrically Dead!

Just went to do my monthly run of my garage queen (do not drive it anymore). New battery and no issues but today was totally dead. Assumed battery down but tests indicate battery at full charge. No lights, no instruments, nothing. Just as if there were no battery at all? 2000 4.0 sport. Any ideas? Last time I started it no issues at all?

Turns out my charger is NFG. Now charging and will be back in action by morning. New battery was down to 2.03 volts!