Computer based energy management

A computer program product for providing computer based energy management, the computer program product comprising:

• a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
• receiving a request for billing data for a group of devices, the request including a date range;
• requesting energy usage data in the date range of the devices, the energy usage data sourced from one or more adaptors in communication with the devices, and the requesting to the one or more adaptors via a server network;
• receiving the energy usage data from the one or more adaptors via the server network;
• determining if the energy usage data includes actual usage of each device in the group of devices;
• estimating actual usage data of a device in the group of devices in response to determining that the energy usage data does not include actual usage of the device;
• assigning a cost to each of the devices in the group of devices, the cost responsive to actual energy usage data of each device including the actual usage data estimated per device in the group for devices that do not include the actual usage;
• and
• transmitting the billing data to a requestor, the billing data including a device identifier, actual usage data, an assigned cost of each of the devices in the group of devices, an actual usage total of the group of devices, an assigned cost total of the group of devices, and the date range, thereby providing billing visibility at a device and group level.