Once you have gathered the necessary information, follow these steps to calculate the required inverter capacity: Calculate Pump Power (P) P = (Q H g) / ηp – Q: Pump flow rate (m³/s or gal/min) – H: Pump head (m or ft) – g: Gravitational acceleration (9. 2 ft/s²) – ηp: Pump efficiency. . Before exploring the compatibility of water pumps with inverters, it is essential to understand the different types of water pumps available. There are two primary categories: 1. Water pumps are indispensable tools for various applications, from residential water supply to industrial processes. The power requirements can be calculated using the following formula: Power (Watts) = Voltage (Volts) x Current (Amps) First, you need to identify the voltage and. . This is a solar inverter which allows power to be switched from the DC power obtained from solar panels to the AC power needed to control the pump.