“Grid” and “battery” don’t belong in the same sentence.
They are building a battery energy storage system (BESS) five miles from my house. It supposedly will charge off-peak and supply electricity during peak hours. Of course, NY would not need these if they didn't shut down Indian Point and turn off the Natural gas.
That wasn’t a window - it was an emergency escape door. What do you want to bet the passenger next to that door opened it ?
From other sources, this was a plugged door, an optional emergency escape door location that is used depending on the seating layout (and I suspect, the stretch).