Examples relate to flexible datacenters or other power loads tolerant of intermittent operation and configured to use power received behind-the-meter. A system may include a plurality of computing systems that receive behind-the-meter (“BTM”) power from a BTM power source. The system may include a first controller configured to control a first set of computing systems and a second controller configured to control a second set of computing systems of the plurality of computing systems. The system may also include a third controller communicatively coupled to the first controller and the second controller. The third controller is configured to provide instructions to the first controller and the second controller based on BTM power availability at the plurality of computing systems.