Car Not Staying Awake

I use Raspberry Pi running TeslaUSB for archiving the dashcam videos to the server. The device needs to be kept powered up until it is done archiving. I've tried using the TeslaFi API calls for either 'wake' or'wake_up' every few minutes and noticed the car still goes to sleep after seemingly random times. I'm calling the API every 5 minutes, so as not to waste or exceed the max calls/minute and run into lock-outs. Is my problem not calling often enough? or something else?