The PG1 monochromator beamline branch houses the XUV double stage RIXS spectrometer as a permanent experimental end-station for RIXS studies on solid samples. The instrument is designed to cover the photon energy range from 20 - 200 eV with high energy resolution of about 2 – 20 meV (design values in additive mode) and to suppress the elastic line and stray light.The RIXS spectrometer effectively operates with four reflective off-axial parabolic mirrors and two plane-grating units, making use of the same SX 700 type monochromator as PG2.  Kirkpatrick-Baez (KB) refocusing optics produces a fixed FEL microfocus of 5 μm (vertically) at the sample position. The facilities optical pump-probe laser is coupled to the end-station thus allowing for time-resolved resonant inelastic X-ray scattering studies on solid samples at FLASH.