Plaid leader Rhun ap Iorwerth will tell an event hosted by energy non-profit organisation Community Energy Wales that his party would set up a national energy body for Wales that would be responsible for large-scale projects.
Small to medium sized energy projects in Wales, between 10MW and 350MW, need permission from the Welsh government before they go ahead.
Larger schemes are determined by the UK government, while smaller are dealt with locally.
The politician will say that Plaid supports “renewable energy unequivocally just as we believe that the wellbeing of communities has to be at the heart of the Welsh government’s energy strategy”.
Ap Iorwerth is expected to say: “Done right, the green energy transition comes with major social and economic opportunities. I am clear that Welsh communities can and must benefit fully from Welsh renewables, and that includes a fair share of the profits.
“Ultimately, we think that increasing communities’ share in the ownership of Welsh renewables is the best way of securing a higher level of reinvestment in those communities in the longer term.”
Plaid Cymru’s announcement did not say how communities stakes will work, or which bodies would benefit.