When we configure the PV water pumping system, how many PV panels are needed for the PV water pumping inverter?
The configuration of a photovoltaic (PV) water pump inverter requires consideration of the customer’s actual power needs, the power output of each solar panel, geographical location, and solar irradiance conditions. Generally, the basic formula to calculate the number of solar panels needed is:
Number of Solar Panels=Inverter Power RatingPower Output per Panel×Safety Factor
The safety factor is typically between 1.25 and 1.5, accounting for temperature effects, dust遮挡, and losses due to inverter efficiency.
For instance, if the PV water pump inverter’s power rating is 3000W and each solar panel outputs 300W, choosing a conservative safety factor of 1.5, the approximate number of solar panels required would be:
Number of Solar Panels=3000300×1.5=10×1.5=15
This suggests that, ideally, around 15 pieces of 300W solar panels would be needed to complement a 3000W inverter. However, actual configuration should also factor in specifics such as the maximum power point tracking (MPPT) range, array configuration (series and parallel connections), and the overall system design, which should be finalized through professional consultation.
Please note that this calculation serves as a simplified example. In practice, a more detailed design and calculation are necessary, including considerations of the open-circuit voltage (Voc), operating voltage (Vmp) of the panels, and the inverter’s maximum input voltage, among other technical specifications. Therefore, it’s advisable to consult with professionals before installation for precise calculations and design.
