The total power consumption (all equipment including the box inside your home, and the antennas) is ~$2.50 a month of electricity, which is paid by the customer.
Each antenna uses ~7 watts at max power. Assuming 3 antennas are installed in a home, plus power for the mini-computer that is housed in the equipment box – we're running at ~28 watts.
This is equivalent to 21 kWh per month. A typical US home uses about 900 kWh per month, and the average price in the US per kWh is $0.12. Assuming this price, our full installation would increase your monthly electricity bill by about $2.50.