[For the Special Session on "Sustainable Energy Finance".]

This paper derives the optimal investment policy of an electricity producer during a pandemic. We consider three problems: 1) investing in a gas-fired plant, 2) investing in a wind plant, and 3) investing in the best of a gas plant and a wind plant. Optimal investment boundaries are characterized and valuation formulas derived. For single technology projects, a pandemic postpones wind investment, but can accelerate gas investment when the relative price of gas decreases. For choices between the two technologies, a substitution effect can reinforce the single technology effects, accelerating gas investment under certain conditions. The paper examines the impact of pandemic parameters, economic parameters and policy parameters on the investment boundaries, the values of projects and the premium for Green energy.