▁The ▁Sol ar ▁Energy ▁Techn ologies ▁Office , ▁also ▁known ▁as ▁the ▁Sun Sh ot ▁In iti ative , ▁funds ▁co oper ative ▁research , ▁development , ▁demonstr ation , ▁and ▁deployment ▁projects ▁by ▁private ▁companies , ▁univers ities , ▁state ▁and ▁local ▁govern ments , ▁non pro fit ▁organizations , ▁and ▁national ▁labor ator ies . ▁It ▁focus es ▁on ▁phot ov olta ics , ▁concentr ating ▁solar ▁power , ▁soft ▁costs ▁( the ▁non - hard ware ▁costs ▁of ▁solar ), ▁commercial izing ▁techn ologies , ▁and ▁integr ating ▁solar ▁with ▁the ▁grid . ▁ ▁The ▁Ge oth erm al ▁Techn ologies ▁Office ▁supports ▁research ▁and ▁development ▁for ▁ge oth erm al ▁techn ologies . ▁ ▁The ▁Wind ▁Energy ▁Techn ologies ▁Office ▁conduct s ▁research ▁and ▁development ▁activities ▁in ▁land - based ▁and ▁off sh ore ▁wind ▁power ▁and ▁works ▁with ▁national ▁labor ator ies , ▁univers ities , ▁labor ator ies , ▁and ▁indust ries . ▁ ▁The ▁Water ▁Power ▁Program ▁research es , ▁tests , ▁evalu ates , ▁and ▁develop s ▁hyd rop ower ▁and ▁hydro kin etic ▁energy ▁techn ologies . ▁ ▁Energy ▁efficiency ▁sector ▁The ▁Building ▁Techn ologies ▁Office ▁supports ▁research , ▁development , ▁and ▁deployment ▁activities ▁to ▁reduce ▁energy ▁use ▁in ▁U . S . ▁buildings . ▁The ▁office ' s ▁long - term ▁objective ▁is ▁to ▁reduce ▁the ▁energy ▁use ▁intensity ▁of ▁homes ▁and ▁commercial ▁buildings ▁by ▁ 5 0 % ▁or ▁more . ▁ ▁The ▁Federal ▁Energy ▁Management ▁Program ▁see ks ▁methods ▁and ▁technology