You end up with the same amount of energy. Rather than thinking about it as a continuous activity, it is easier to think of it as pulses with a short length. But here are some numbers to illustrate. The satellite is far enough away that the clock is twice as slow. From the reference frame of the satellite, it sends out 4 second pulses at 1 Volt of 3 Coulombs per second.
At the satellite the energy looks like, 4s * 1V * 3Cps == 12J
On the ground the energy looks like, 8s * 1V * 1.5Cps == 12J
Think of it this way, the number of electrons flying down the wire is unchanged, but the pulse is longer. Therefore, the rate of the electrons must be lower, but this is balanced out by the pulse being longer. Ergo, the energy is conserved. There is more time to do work, but the work is proportionally lower too. It is similar with a continuous calculation as well, where you can think of it as an infinite number of infinitesimally small pulses; it is just that they are different sizes of infinities. This stuff can get confusing fast, especially because we are used to things like simultaneity holding, which it doesn't when you are dealing with relativity.