Does a thrifty guest notice anything about prepaid electricity?

A frugal guest mainly notices that their balance barely decreases: the screen registers their consumption, but passes no judgment. Without this module, they have no visibility into what their frugal behavior achieves. At a reasonable price per kWh, there is often credit remaining at the end of their stay, which they can leave or have refunded. They won't face unpleasant surprises or questions afterward about high consumption; that only affects guests who actually use a lot.