Automatic switching of counters day and night: how to do it

A time relay with a changeover contact at the output and two contactors are needed. At night, the relay will turn on and turn on one contactor, which will connect the houses to one meter, turn off during the day and the changeover contact will turn on the second contactor to keep track of the second counter. If necessary, I can pick you up the components for assembling this.

But is it worth it? What exactly are your tariffs? I understand that one house is through a one-rate meter, and the other through a two-rate meter? If so, isn't it easier to connect both houses to one meter? Or install two-tariff metering devices on both houses?

And in this case, no one and under no circumstances will fine you if suddenly your idea turns out to be a violation. And most likely the violation will consist in the fact that since each of the houses is connected to "its" meter, then they have different personal accounts for paying for electricity, and you pay separately, but it turns out that you consume together.