>>Capsta+(OP)
Econ 101: with a marginal cost equal to zero, a competitive electricity market (with a price driven to marginal cost because of competition) cannot be sustainable because electricity price it cannot pay for the fixed costs.
Solution: we must stop electricity pricing based on energy produced (which made sense when using fossil fuel) and switch to a pricing mechanism where you pay for available power because that's where the marginal cost is increasing.