It is practical to utilize a deep well submersible pump with an inverter; however, there are a few important factors to ensure that the motor is not damaged.
- Inverter Capacity
- Pure Sine Wave Inverter
- Voltage and Frequency Compatibility
- Proper Sizing
- Battery Bank
- Pump Controller
- Inverter Efficiency & Quality
- Heat Dissipation
- Cable Length
- Soft Starting
Inverter Capacity
The inverter must be sufficient to handle the power requirements of submersible pump. This contains both the running and surge (starting) wattages. Submersible pumps frequently require a large amount of power to start, often 2-3 times their running power.
Pure Sine Wave Inverter
A pure sine wave inverter is preferred over a modified sine wave inverter. Pure sine wave inverters produce a smoother & more consistent flow of energy, which is essential to the pump motor’s optimum operation and longevity.
Voltage and Frequency Compatibility
Verify that the inverter’s output voltage & frequency meet the pump’s requirements. Most deeply submerged submersible pumps are built to run on specified voltages and frequencies (230V, 60Hz in the United States).
Proper Sizing
The inverter must be sized to meet both the continuous running load and the pump’s peak starting load. For example, if your pump needs 1000 W to run but 3000 W to start, the inverter must withstand the 3000-watt surge.
Battery Bank
If the inverter is driven by batteries, make sure the battery bank is large enough to give the required power without causing substantial voltage loss. The battery system should be capable of delivering enough current to support the pump’s start-up surge.
Pump Controller
Many submersible pumps include controllers that may regulate the start-up current demand. A pump controller can help moderate the first surge, making it easier for the inverter to handle.
Inverter Efficiency & Quality
Purchase a high-quality inverter with high efficiency ratings. Poor-quality inverters may not deliver a consistent output, potentially damaging the motor over time.
Heat Dissipation
Make sure the inverter has appropriate cooling and is situated in a location where it is able to dissipate heat efficiently. Overheating might lower the inverter’s performance & longevity.
Cable Length
Long runs between the inverter & the submersible pump can result in voltage drops & reflections. To reduce interference, utilize shielded cables or the manufacturer’s recommended maximum cable lengths.
Soft Starting
Inverters provide soft starting of the submersible pump, reducing mechanical stress & current inrush during startup.
Taking these factors into consideration, you can securely utilize a deep well submersible pump with an inverter. To avoid causing damage to the motor, ensure that the inverter parameters match the pump’s requirements.