One of the scientists involved said that the lander will be covered with a meter of frozen CO2. Powering up after that might be iffy.
Hey, it’s certainly worth a try to power up the lander after the sun is due to rise again. Probably wouldn’t work, though. I was just reading about the different instruments on board the lander, and one of the interesting ones is the robotic arm. The arm will be arm to dig up to 1.6 feet down into the Martian soil. That’s pretty deep! We just might see liquid water on Mars for the first time...