Wind and solar batteries are expected to attract $ billion of investment by 2050 , according to a report by Bloomberg New Energy Finance ( BNEF ) . Rapid increases in the cost of the technology will cause funding to grow considerably over the next three decades , with renewables set to account for 48 % of the world 's electricity supply . The report says wind and solar technology is the least expensive means of adding new power - generating capacity to two - thirds of the world , with that figure expected to grow over the coming decades .
Wind and solar batteries are set to attract $10tn of investment by 2050, according to a projection by Bloomberg New Energy Finance (BNEF). Rapid declines in the cost of the technology will cause funding to grow considerably over the next three decades, with renewables set to account for 48% of the world's energy supply. The report says wind and solar technology represent the least expensive means of adding new power-generating capacity to two-thirds of the world, with that figure expected to grow over the coming years.