These costs, which arise at the pre-feasibility, feasibility, development, and engineering stages, can be substantial barriers to the deployment of Renewable-energy and Energy-efficient Technologies (RETs).
Gharama hizi, zinazotokea wakati wa hatua za kabla ya uwezekano, uwezekano, maendeleo, na hatua za uhandisi, zinaweza kuwa vipingamizi vikubwa kwa maendeleo ya Nguvu zinazoweza kurudiwa upya na Teknolojia za Ufanisi-nguvu.