At least, not a direct substitute. Solar and Wind have proven to be successful partial cost-effective substitutes for fossil fuels, but fossil fuels are stored energy, and solar and wind are not. Renewables are a disruption, and disruptions are usually not one-for-one substitutions.
There are two strategies for replacing fossil fuels in the grid, and they can be used together:
- 1: Add energy storage for when renewable energy levels fall below a threshold.
- 2: Base load “solar and wind”: Design to provide base load at a low threshold of wind and light.
Without such strategies, it is impossible to reach the goal of removing reliance on fossil fuels. With the right strategy, it is possible to realise benefits go far beyond just replacement.