High renewable future in the UK and Germany to create new power systems flexibility challenge (WK-intern) - BONN, GERMANY – Economic tipping points mean renewable energy will account for over half of electricity generation by the mid-2020s in the UK and Germany. This comes as the cost of generating energy from wind and solar is expected to more than halve from today’s levels by 2040. This rapid growth in variable renewables will lead to much greater volatility in the power system, challenging inflexible ‘baseload’ generators and creating opportunities for new flexible sources. Due to the variable nature of wind and solar, there will