You run a server hall. Traffic grows every day, racks get hot, and at night the grid is flaky. Keep the requests served, the racks cool and the power on.
Rack serves traffic, makes heat, draws 3 power. Over 70 °C it throttles, over 85 °C it drops offline.
Cooler chills itself and the 8 tiles around it. Draws 2 power. Coolers on the edge waste half their cold.
Battery covers 6 power for 25 seconds when the grid drops. Recharges by day.
Generator makes 6 power whenever the grid cannot, and burns fuel while it runs.
Grid feed adds 8 power permanently. Gets pricier each time.
Serve under 85% of demand and your SLA drains. At zero, the customers leave. Survive 7 days.