Prison Architect Wiki

Solar panels is a generator that harnesses the power of the sun to generate electricity. They can be connected to multiple green power sources, but their power must first flow through a Transformer before it can be used within a prison.

Solar panels are the least efficient form of energy source, however they are the only ones available at the start of the game. Each solar panel generates 75 units of power from 6 a.m. to 8 p.m.

This works out to exactly 43.75$/day of profit from energy export via Power Export Meter (75 units * 14h * (500$/12000 units*h)), or 87.50$ if the Green Energy Goal 9 grant has been completed. That means a set of solar panels will pay for itself after 46 days (23 days if the grant was completed).

A maximum of 128 green energy sources (solar panels, Solar Wind Hybrids or Wind Turbines) can be placed in a single prison.