DJM900 NXS2 Turning off during playback

My first time posting, I'm having a problem with my 900 nxs2 turning off. It turns of then back on again. It has happened on two occasions, both times I was outdoors and running the system off my generator. I've never had any issues using it at home or at any indoor event. Can it be an issue with the mixer not getting enough power? I have it connected to a regular power strip along with 2 CDJ2000 nxs2 and thats it. The mixer is the only piece that turns off, the cdjs stay on.