Global installed wind and solar capacity had topped one trillion watts ( 1 terawatt ) by the end of H1 2018 , according to a report by Bloomberg New Energy Finance ( BNEF ) . The first TW cost $ 5000 and took around 40 years to achieve . The second TW could be in place as early as 2023 , costing just $ 1.23tn , BNEF predicted . The study said 54 percent of current installed capacity is installed but predicted solar could take over by early 2020 , helped by increased investment in storage .
Global installed wind and solar capacity had topped one trillion watts (1 terawatt) by the end of H1 2018, according to a report by Bloomberg New Energy Finance (BNEF). The first TW cost $2.3tn and took around 40 years to achieve. The second TW could be in place as early as 2023, costing just $1.23tn, BNEF predicted. The study said 54% of current installed capacity is wind but predicted solar could take over by early 2020, helped by increased investment in storage.