The IEA expects global renewable capacity to grow strongly by 2030. Solar power and wind provide most of the forecast growth. A forecast is not a promise about each project. It describes a likely path based on current policy, costs, market conditions and projects already being developed.
Growth could be faster if countries shorten permitting times, expand the grid and add flexible equipment. It could be slower where projects wait for a grid connection or face high financing costs. Readers should therefore ask which assumptions support a forecast and whether those conditions are changing. A forecast is useful when its assumptions are clear. Comparing the main and accelerated cases shows which practical changes could alter the result.