Ambient temperature simply means the temperature of the surroundings and will be the same as room temperature indoors. The Ambient temperature generally lies between in the range of 16 and 26 °C (61 and 79 °F), with an average of 20 °C (68 °F).Solar panel temperature is an often ignored but critical parameter in a hot country like India. Though it might seem counter-intuitive, solar PV panels generate less power in very hot summers as the heat reduces their efficiency (the voltage reduces).