Abstract: A boiler for a solar receiver includes a first boiler panel having a plurality of tubes fluidly connecting an inlet header of the first boiler panel to an outlet header of the first boiler panel. The first boiler panel tubes form a first solar receiver surface. A second boiler panel has a plurality of tubes fluidly connecting an inlet header of the second boiler panel to an outlet header of the second boiler panel. The second boiler panel tubes form a second solar receiver surface. The first and second boiler panels are adjacent one another, a portion of the first boiler panel and an end of the first solar receiver surface overlapping an end of the second boiler panel to reduce solar radiation passing between the first and second solar receiver surfaces. A plurality of boiler panels may be arranged in rectangular or cylindrical orientation about a boiler central axis.