This deck is a complete set of power plant cards for Power Grid that can be used:

in place of the original deck
paired with the original deck (to make for an unpredictable mix)
cards added to the original deck (to make the game as long as "Funkenschlag", game will end at 20 cities)
in custom mixture of the two decks (to create specialized decks) with any maps.

This set of cards has green borders to distinguish them easily from the original set of power plant cards.