If it's possible to distinguish when someone is home from when they are not home based on their electricity usage, a countermeasure would be to install a device inside the home that draws electricity according to a pattern that is indistinguishable from the "at home" usage pattern. Then when you'll be away from home for an extended period, turn on this device. With the noise generated by this device, it will always appear that someone is at home based on real-time electricity meter readings. The device would not need to use much electricity to make the difference between "at home" and "not at home" indistinguishable. If the device serves the purpose of charging a large battery in your basement, you could recover most of the device's small electrical draw.