The solar sector’s steep growth curve – which could see it closing in on one terawatt of installed capacity by 2021 – could be even sharper if policy-based obstacles to growth are removed, said industry body SolarPower Europe (SPE).

The best-case scenario in SPE’s latest five-year Global Market Outlook would see 935GW of PV in place around the world by the end of 2021, up from 306GW at the end of 2016, although the most likely level is 772GW.