Ivanpah failed because of the maintenance costs of the motors moving the reflectors, not the heat engine. Those motors are not really a factor in the kind of se

Ivanpah failed because of the maintenance costs of the motors moving the reflectors, not the heat engine. Those motors are not really a factor in the kind of setup comparable to this article. Stirling engines actually require considerably less maintenance than combustion engines, and the maintenance is simpler because the engines are simpler. Manufacturing tolerances are only relevant if you want to maximize efficiency for competition at commercial scale power production, which is not this case.