welcome to the forum!
looking at the ThinkServer PSREF book found here, RD120 TopSeller models already include two 835W power supplies. models listed are intended for the US market and can be different than what's available worldwide. you would need to speak with your local Lenovo business solution provider (link) to find models specific to your location.
ThinkStation D10 6427CTO · (2x) 3.0GHz E5450 · 16GB · 2.7TB SAS · FX 4800 · Server 2008 R2 x64
ThinkPad X61s 7666B7U · 1.8GHz L7700 · 8GB · 64GB SSD · AFFS SXGA+ · Server 2008 R2 x64
ThinkPad X200T 745068U · 2.13GHz SL9600 · 4GB · 160GB SATA · WXGA EMT · 7 Ultimate x64
NEC MultiSync 3090WQXi
IBM UPS 1500TLV 2130R5X
