A boiler for generating steam has a substantially enclosed housing configured to contain an amount of water to be boiled, the housing having one or more thermally conductive sidewalls which form a substantially enclosed water chamber and a reflection chamber, the reflection chamber including a closed top portion and a opening through which light rays may pass, the opening being vertically disposed below the top portion of the chamber so that the reflection chamber may trap heat, wherein at least one of the thermally conductive sidewalls is disposed so as to divide the water chamber from the reflection chamber. The boiler also include a support structure attached to or integral with the housing, which support structure supports the housing in a substantially fixed position during use of the boiler, and reflecting means for reflecting sunlight through the opening of the reflection chamber and onto a focal point on one or more inner surfaces of the top portion of the reflection chamber. Methods of generating steam and electricity are also described.

 
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