(JP9210472-A)      Heat collector (200) has a box through which a fluid flows from an inlet (202) to an outlet (203) with a heat collector plate (206) to receive heat from the fluid, and a solar cell to receive sunlight through a window (204) in the box. Also claimed is a passive solar apparatus comprising the heat collector as above with the fluid outlet connected, via a duct containing a fan, to a house.    USE -   In supplying heat and electrical power to a house.    ADVANTAGE -   Heat of the collector plate (206) allows the solar cell to operate at a temperature where Stebler-Ronskie deterioration does not occur and also prevents snow accumulation which would shade the solar cell preventing its operation.    (JP9223814-A)      Heat collector (200) has a box through which a fluid flows from an inlet (202) to an outlet (203) with a heat collector plate (206) to receive heat from the fluid, and a solar cell to receive sunlight through a window (204) in the box. Also claimed is a passive solar apparatus comprising the heat collector as above with the fluid outlet connected, via a duct containing a fan, to a house.    USE -   In supplying heat and electrical power to a house.    ADVANTAGE -   Heat of the collector plate (206) allows the solar cell to operate at a temperature where Stebler-Ronskie deterioration does not occur and also prevents snow accumulation which would shade the solar cell preventing its operation.    (US6018123-A)      Heat collector (200) has a box through which a fluid flows from an inlet (202) to an outlet (203) with a heat collector plate (206) to receive heat from the fluid, and a solar cell to receive sunlight through a window (204) in the box. Also claimed is a passive solar apparatus comprising the heat collector as above with the fluid outlet connected, via a duct containing a fan, to a house.    USE -   In supplying heat and electrical power to a house.    ADVANTAGE -   Heat of the collector plate (206) allows the solar cell to operate at a temperature where Stebler-Ronskie deterioration does not occur and also prevents snow accumulation which would shade the solar cell preventing its operation.