|HP of Pump||Min. Rating of Modified-Sine Wave Inverter (KW)||Min. Rating of Sine Wave Inverter (KW)||KW Max. Running Power (Watts)|
* Typical running power is 10-20% less, but add 10% for typical inverter loss. For "modified sine wave" add another 15%, due to loss of efficiency in the motor.
Most well pumps require 230 VAC. Either two stacked inverters, or an inverter with 230V output, or a transformer must be used. (The Trace T-240 transformer will handle 2 HP max.). If all of this is too expensive for your situation, consider replacing it with a lower power pump, carefully selected for the best efficiency (watts per gallon). You can also consider an intermediary storage tank with a DC pressurizing pump. The use of a storage tank will relieve your well pump from the need to start every time the pressure runs low (many times per day). You can pump into the storage tank just once or twice per week, and then use a DC pump to supply the water pressure as needed (or use gravity flow, if feasible). See DC Pressurizing Pumps for Domestic Water Supply and Irrigation. You may also be able to change to a lower power well pump, even a DC well pump, after this step is taken because less pressure and less flow will be required from the well pump.
At Wholesale Solar, we will be happy to help find the products that are right for you. For pricing and product information give us a call. We'll also answer any questions you might have about your system. 1-800-472-1142
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