A modular geothermal measurement system that provides for the pumping of a heat transfer fluid. The modular unit simplifies on-site installation time by reducing the number of distinct components to be installed and allows for the optional incorporating of additional heat sources or sinks, whereby the length of ground loop can be reduced, further reducing installation costs. The modular measurement system further allows for the growth of the system over time by adding modules, increasing the ground loop pumping power while providing energy transfer data specific to each thermal load. A controller having an energy control module provides energy control points. Such a system allows the beneficiary of a geothermal investment to be billed for their benefit, enabling the investor to capture the economic benefit of the investment.