This study aims to design a single sensor control for a PVT system through decision analysis of heat transfer. The single sensor control experimental results are analyzed and compared to a temperature difference control of an analog system. It is found that the efficiency of single sensor control is slightly lower, but according to the theoretical analysis , its efficiency is higher than that of a normal PVT system. The effects of the sensor position and thermal insulation on the PVT system performance are also investigated. While discussing heat transfer efficiency, this paper also presents and analyzes the power generation benefit of PVT systems. An average power generation increase of 1.81% is registered for a non-insulated PVT system compared to 2.83% for an insulated PVT system. This study also mentions the cost and benefit and analyzes the change of cost recovery period under different electricity prices. The results show that the PV module with single sensing control can recover the cost within 3-5years