We endorse the ideas presented by the authors Klöckl et al. on the need of a mixed bag of energy supplies, with this likely being a combination of solar, wind, hydro, and nuclear in the future. Nevertheless, based on our analysis, we believe that the increased deployment capacity of solar photovoltaic (PV) systems will decrease their cost more than wind, making solar PV important in meeting the Intergovernmental Panel on Climate Change (IPCC) requirements for greater sustainability.