Surely any electrical utilities would be able to monitor this without having to pay people. Look for accounts where there is fairly high usage for a few hours between 00-07 hours. Then look at the hourly or minutely usage on the account.
Toronto Hydro wants sent me a report saying that I was one of the highest uses of electricity in my neighbourhood and therefore bad for the environment. They missed the fact that I drove an EV so was way more environmentally friendly compared to people who own ICEs.