The first planned tasks on the Expedition One crew's schedule will be to activate Zvezda and Zarya, to set up food preparation and heating equipment and to complete activation of the Zvezda module's toilet. The crew then will begin work to set up and activate the lab's Vozdukh carbon dioxide removal system and an Elektron oxygen generator. Because two of Zvezda's eight batteries are not working, resulting in tight power margins, the Elektron will not be turned on full time until after the P6 solar arrays are attached and providing power to U.S. and Russian modules. Until the P6 arrays are in operation, the crew will rely on Russian "oxygen candles" to generate their air. The solid-fuel oxygen generators (SFOGs), generate oxygen as a by-product of a chemical reaction. Three candles a day will be burned, inside a special housing. After the P6 arrays are on line, the Elektron, which uses a kilowatt of power to operate, will take over. The solar arrays will be included as part of the cargo aboard the November 30 shuttle flight.