A solar power system may comprise a back sheet that comprises an interconnect circuit coupling a plurality of cell tiles. A tiled solar cell, comprising a solar cell and encapsulating and glass layers, is inserted into the cell tiles of the back sheet. Each solar cell is individually addressable through the use of the interconnect circuit. Moreover, the interconnect circuit of the back sheet is programmable and allows for dynamic interconnect routing between solar cells.

A DC-powered refrigeration system may include controls configured to switch between available DC power supplies and manage the refrigeration system in accordance with one or more methods. The one or more methods of the control system may include multiple tiers of power management, including, e.g., maximization of power usage when on a photovoltaic power supply to subcool a refrigerated load.

A system for providing power from solar cells whereby each cell or cell array is allowed to produce its maximum available power and converted by an operatively connected DC/DC converter. Each cell or cell array has its own DC/DC converter. In one form the system for providing power from solar cells includes one or more solar generators wherein each of said solar generators has one to nine solar cells; a maximum power tracker operatively associated with each solar generator, each of said maximum power tracker includes a buck type DC/DC converter without an output inductor, each of said maximum power trackers are operatively connected in series with each other; an inductor operatively connected to the series connected maximum power trackers; and means for providing electrical power from the inductor to load means, wherein each of said maximum power trackers is controlled so that the operatively associated solar generator operates at its maximum power point to extract maximum available power.