Systems and methods of retrofitting an existing mechanical time clock enclosure to an Internet controllable, electronic pool and/or spa controller with improved, multi-functionality. In some instances, the conversion can be made without the need for adding new, additional enclosures (and corresponding wiring) and can expand the functionality of the controller to operate one or more valve actuators, one or more circuits, provide two-way communication with variable speed pumps and/or allow the electronic controller to access and/or be controlled by the Internet or with interface software.