This is a kit that includes everything you need to design a science project based on "measuring the effect of solar panel orientation on power output of the solar panel". Also referred to as "how solar panel angles effect efficiency of solar panels". The digital meter starts reading at 2.7V. The solar panel is rated at 6 volts and will go higher than that in full perfect sun. You can vary the angle of the panel facing the sun (tilting towards the sky or towards the horizon) and you can measure the voltage periodically during a full day or sun and see the effect of the dusk to dawn period as the sun moves from east to west.