Renewables are cheap and clean, but they are also variable. The core task facing grid planners is balancing that variability with reliable capacity that is available when the wind drops and the sun sets. Getting this balance right is what separates a stable transition from a fragile one.
Reliable baseload provides the floor beneath a renewable-heavy system. Combined with storage, demand response, and strong interconnection, it allows grids to absorb large shares of wind and solar without sacrificing security of supply.
The most successful systems treat these resources as a portfolio. Rather than pitting baseload against renewables, they design the two to reinforce each other — delivering both lower emissions and dependable power.