yep. Plenty of threads around here you can read for other examples. Sentry ON is one of the things that keeps the car awake. IT consumes very little power when asleep but consumes a constant 200-250w when awake. That means 1kWh in 4-5h, so 24h is around 5-6kWh, and your battery contains 75-80kWh when full. 6/80 is 7.5%...