"renewable share" is a correct and usable phrase in written English.
It can be used to describe the proportion or percentage of energy or resources that come from renewable sources. Example: "The country aims to increase its renewable share to 50% by 2030, in an effort to reduce carbon emissions and combat climate change."
But Weiss said the likely reality of a renewables explosion would not be uniform: "Average 33% across the country is a different story from having a 70% renewable share in some places and a 10% renewable share someplace else".
The transition towards 100% renewable electricity production already raises several challenges at only 20-30% of renewable share.
At the same time, the absence of changes in building features and the introduction of a renewable share in the supply address the sustainability issues of cultural heritage.
The dispatch capacity of the highly flexible backup system becomes dominant for renewable shares beyond 50%, and reach their maximum around a 70% renewable share.
In March, the government announced a plan to increase the renewable share to 22.7% by 2020, slightly ahead of EU targets.
Britain is among Europe's laggards in expanding the renewable share of its energy mix, ranking in the bottom three of the European Union league table just above Luxembourg and Malta.
Their renewable shares are already close to 20%.
For renewable shares above 70% the highly flexible backup capacity in Germany remains at its maximum, whereas it decreases again for Europe.
This modelling shows that the slowly flexible backup system is dominant at low renewable shares, but its optimized capacity decreases and drops close to zero once the average renewable power generation exceeds 50% of the mean load.
But in contrast to regions with higher renewable shares from vRES, the amount of avoided BE power production in times of negative RL (excess power from renewables) is still negligible for the 2022 time frame investigated and thus reducing the immanent requirement for flexible BE.
That's only a sliver higher than renewables' share of the energy mix now, at about 6%.
