this could be done either by switching from stable feedin tariffs to feedin premiums that provide a fixed markup over market prices or from subsidies for deployment rather than for production both would provide renewable producers with an incentive at least not to produce at maximum capacity in times of negative prices and thus provide better remuneration also for dispatchable capacity the very question however shows how scenarios with very large shares of intermittent renewables say above of electricity production begin to require adjustments that create intrinsic ceilings to the original objective