Solar heating system. A solar connector. A double storage device connected to the collector to provide coolest possible heat transport medium at beginning of each day's collection and to control collector input temperature at minimum temperature and hence maximum collection efficiency. The first storage device has a capacity for approximately one days operation. The second storage device has a capacity for several days operation. The operation of the storage devices are controlled so that the first storage device is heated first and when the first storage device is heated sufficiently then the second storage device is heated. The operation of the storage devices are also controlled so that the first storage device is used first for heating and when the first storage device is depleted of useable heat then the second storage device is used.
