Abstract: Microgrids and methods for controlling a microgrid. In one example, a microgrid includes a microgrid controller, a primary junction, a high-voltage supply line, a high-voltage output line, one or more switchgear connecting the primary junction to at least one other component of the microgrid, a plurality of photovoltaic (PV) panels, a breaker connected to the plurality of PV panel inverters, a first load connected to the breaker, and one or more battery banks. In some instances, the microgrid includes a ground bank transformer configured to provide a ground current path. Each of the plurality of PV panels is connected to one of a plurality of PV panel inverters. Each of the battery banks may include a plurality of battery cells.

Abstract: A wide angle passive infrared energy sensor includes an infrared transducer. Energy in the field of view which is essentially normal to the transducer impinges directly on the transducer which can in turn generate an electrical signal in response thereto. Radiant energy at the peripheral regions of the field of view, on the order of 90.degree. with respect to a center line normal to the detector, is parabolically reflected onto the detector.

Abstract: A self-contained rechargeable device, such as a flashlight, utilizing a rechargeable source of electrical energy, such as rechargeable batteries, and including a pivotally mounted connector for connecting the battery and any recharging circuit connected thereto to a source of recharging energy when positioned in a recharging position and, alternatively, having a standby position internally of the device in which the connector enables a circuit between the source of energy and a load to be operated thereby. The circuit is completed by operation of a manually-operated switch connected between the energy source and the load. The load is totally disconnected from the battery during recharging.