1. To develop the calculation method.
(1) we often use power to measure the efficiency of solar panels are working, want to calculate the solar panel amperage we can think of very simple: Power = Voltage × Current, only need to be clear about the power and voltage of the solar panel can be calculated solar panel amperage.
(2) direct measurement, if the solar panel is in the standard maximum power environment we can realize the circuit can be directly measured to derive the solar panel ampere
2. Measurement data.
(1) Power(watt), about the power of the information is very easy to find in the business of the purchase information, followed by the solar panel in each piece of solar panel labelling will be marked with the rated power of the solar panel.
(2) Voltage(V), general solar panels on the battery will also mark the working voltage of the solar panel, but that is only a reference value in fact, the working voltage is not, then if you want to get the real voltage you need a universal meter, you only need to simply access the circuit will be able to understand the voltage of the solar panel at this time.
3. Example calculation.
After understanding the value we can use P = UI, calculation, for example, a power of 200 watts of solar panels his working voltage of 20 volts then his solar panel amperage is 200/20 = 10A.
4. Considerations.
(1) the environmental impact, the solar panel’s rated power is in the saturated sunlight state at the right temperature to achieve the power, in practice this effect is difficult to achieve, he and the angle, orientation, sunlight intensity and so on have a relationship with, if you happen to have a meter, then indeed you can know the actual working power of the solar panel.
5. Parallel and Series Calculation.
We now know how to calculate the amperage of a solar panel, but we certainly do not have just one solar panel, and the method of calculating the amperage of multiple solar panels is different.
(1) solar panels in parallel, solar panels in parallel when the voltage of each solar panel is the same, the current in the dry circuit is the sum of the individual solar panels, applicable to larger current system.
(2) solar panels in series, solar panels in series can enhance the overall voltage, the voltage is the sum of the individual solar panels, the current remains unchanged in high-voltage systems.
Conclusion.
In the use of multimeter and other tools should pay attention to the use of the operation if necessary, you can contact the relevant personnel to help measure, you test the solar panel amperage is only the value of the time, he will always change can only be used as a reference. The calculation of solar panel amperage can be used for your electrical system to consider the compatibility between various devices.
