The IEA forecasts that by 2023 solar powers will increase by almost 600 GW.

International Energy Agency (IEA) published the report Renewables 2018 – market analysis and forecast from 2018 to 2023 on renewable energy market and technologies, which provides global trends and developments for renewable energy in the electricity, heat and transport sectors. IEA forecasts that solar PV dominates renewable electricity capacity expansion. Solar PV capacity is forecast to expand by almost 600 GW – more than all other renewable power technologies combined, reaching 1 terawatt (TW) by the end of 2023.

Sources: https://www.iea.org/renewables2018/