Since the average car consumes almost as much power as the average house this free nights and weekends deals can be gamed by EV owners. Even more so by people who have two EVs at home.
For example if you have 2 EVs and are on a free nights and weekends. Your annual consumption for your house and 2 cars might be 10,000 KWH and 20,000 KWH respectively. Say you get onto a 3 year fixed rate of 9 cents per KWH with free nights and weekends. If you charge your cars exclusively on nights and weekends (would need two chargers) you would effectively bring your average price down to 3 cents per KWH.
IMO suppliers will eventually wise up and make changes to their plans if too many exploit this giant loophole. On the other hand power is plentiful at night so you are doing the grid a favor by consuming all that free power. But until then you are foolish not to take advantage.
In the future we will shift power with all these batteries on wheels by charging at night and discharging during peak times. That will be fun and for a another conversation.
Interesting idea. Checked my own usage before and after the model 3 and don’t think it would work for me. On average. 200 to 300 more kWh used per month so that’s only 10 to 20% of my electricity use. (10 min commute) My understanding is those plans would charge a lot more for the other 80% of my use.