solar construction costs came in at $1,588 per kilowatt in 2022, according to the EIA. Nuclear power is cost-competitive with other forms of electricity generation, except where there is direct access to low-cost fossil fuels. Fuel costs for nuclear plants are a minor proportion of total generating costs, though capital costs are greater than those for coal-fired plants and much. Nuclear power is cost competitive with the renewable generation when the capital cost is between $2000 and $3000/kW, although some rare cases this value has been significantly higher due to unforeseen issues, as for example in the third unit in Olkiluoto, Finland at an estimated 6800€/kW. nuclear builds illustrate the problem: the. Clean energy comes at a cost, though, especially for investors looking to build a nuclear power plant. The estimated costs of building a nuclear power plant vary from $14 billion to $30 billion. That's roughly ten times more expensive than solar. Energy Information Administration, the LCOE for advanced nuclear power was estimated at $110/MWh in 2023 and forecasted to remain the same up to 2050, while solar PV estimated to be $55/MWh in 2023 and expected to decline to $25/MWh in 2050.