Abstract: A DC bus is connected to a PV array, a battery or both, to power a grid connected inverter load on the bus. A system and method is described for controlling current flow on a DC bus regardless of the type of inverter. A converter receives a DC battery voltage. A switching module controls current flow through the converter. A current generator generates a reference current in response to a reference voltage. A comparator connected at the output of the current generator compares the reference current with a battery current and outputs a signal to a controller. The controller generates a reference value. A PWM generator modulates the switch module to control current flow and energy flow between the DC bus and the battery. The current from the DC bus to the inverter is controlled to allow proper grid-connected operation regardless of inverter type.

Abstract: A charger for a plurality of cells comprises a plurality of cells, a plurality of DC power sources, a common DC source in electrical communication with each of the plurality of DC power sources, and a CPU configured to selectively control the connection between each DC power source and the corresponding cell. Each DC power source of the plurality of DC power sources is selectively connectable to a corresponding cell of the plurality of cells.

Abstract: A document management system (10) includes a content repository (14) for storing a file, a management system (12) for monitoring and managing the file in the content repository (14), and an authoring portal (15). The authoring portal (15) embeds ActiveX controls in a document, parses the document, and converts the document into an HTML file. The authoring portal (15) further generates JavaScript codes, thereby enabling the content repository (14) to dynamically respond the input of a user and provide the user with feedback without accessing a database associated with the document. The codes also enable the content repository (14) to dynamically adjust the sequence in which the documents are presented to the user in response to the inputs from the user.

Abstract: A data transfer and management process includes transferring an XML string representing a tree structure of a folder from a network server (12) to a client station (14A) in response to a request at the client station for accessing the folder. The transferred XML string includes the information regarding all subfolders and the names of all files in the folder, but not the content of the files in the folder. At the client station (14A), the XML string is parsed on demand to generate JavaScript codes to present the descendents of a folder in response to a request for accessing the folder, which may be a root folder or a branch folder. In response to a request of accessing a file in the folder, the client station (14A) initiates a process for transferring the content of the file from the network server (12).