Every year a solar array waits, the plant it would have displaced keeps running. The post's arithmetic: 1 GW of solar at 25% makes about 2,200 GWh a year, and that much brown-coal power costs about 72 lives a year.
Death rates per TWh from Our World in Data (accidents and air pollution): brown coal 32.7, coal 24.6, oil 18.4, gas 2.8. Solar's rounds to zero. Comparisons from the post: Volkswagen's emissions cheating, about 100 deaths; the 9/11 attacks, 2,996.