Patent ID: 7629708

Claim:
A system for supplying electrical power to equipment at a telecommunications site, comprising: a DC bus that interconnects the telecommunications site equipment with a first power delivery circuit and a second power deliver circuit; a photovoltaic subsystem serving as the first power delivery circuit for selectively delivering DC voltage to the DC bus, the photovoltaic subsystem including: (a) a solar photovoltaic array; (b) a disconnect for controlling electrical connection between the solar photovoltaic array and the DC bus; and (c) a DC/DC voltage converter for converting the output DC voltage of the solar photovoltaic array to another DC voltage delivered at the DC bus; and the second power delivery circuit for selectively delivering DC voltage to the DC bus, the second power delivery circuit including a rectifier that is configured to perform operations comprising: (a) sensing a low-voltage condition where the photovoltaic subsystem delivers insufficient DC voltage to the DC bus; and (b) incident to sensing the low-voltage condition, enabling an AC power source to supply DC voltage to the DC bus by converting incoming AC voltage from the AC power source to output the DC voltage delivered at the DC bus, wherein the DC voltage supplied by the AC power source is combined with the DC voltage from the photovoltaic subsystem to meet consumption demands of the telecommunications site equipment.