Zarya [SEP] manufacturer
1998 in Russia at the Khrunichev State Research and Production Space Center (KhSC) in Moscow, its control system was developed by the Khartron Corp. (Kharkiv, Ukraine). The module was included as part of NASA's plan for the International Space Station (ISS) instead of Lockheed Martin's "Bus-1" option because it was significantly cheaper (US$220 million vs. $450 million). As part of the contract Khrunichev constructed much of an identical module (referred to as "FGB-2") for contingency purposes. FGB-2
docked to the Zarya nadir port.
RKK Energia, the manufacturer of the ROS components, has proposed to execute something similar to the original ISS plan with the addition of a Nodal Module (with six docking ports) and two additional science/energy modules to the segment around 2013-2015. The science/power modules would have solar arrays similar to the SPP, but unlike it the truss structure would be much smaller.