Brisbane will be home to the world's largest solar power plant. Power Christmas tree. Lord Campbell Newman, the mayor, said in a release of the city's Christmas Countdown, 18. 2-New one-meter treeThe renovated King George Square will be equipped with 16,000 light bulbs, 250 red opaque gadgets and will be powered by a starSolar panels in shape. "We will have a bigger and better Christmas tree this year --"We think this is the largest solar Christmas tree in the world," Newman said . "The Christmas tree will not be connected to any power system. The solar panel will generate 50 amps of energy per hour to make five heavy duty dry battery gel batteries located at the bottom of the tree. The former tree of the council uses 5,000 watts of electricity per hour. On November 27, the lights of the tree will be officially turned on.