my power flickers for a few seconds too often for my comfort.
so my lights stay light for a while after a power outage, up-until now i have only had to
deal with a flicker and this ups has saved my light schedule many times.
do not put it on top the tent unless you have something underneath it, it would suck to melt a hole through your tent. i would use a couple bricks and set it on the ground outside the tent. just keep it off the ground.