The size of the inverter required to run a well pump depends on the pump's wattage and surge requirements. As a general guideline: Larger pumps, such as a 2 HP pump, will require inverters with continuous ratings of 4000W or higher and surge capacities of. . Getting the right inverter size for your AC well pump basically revolves around three factors: how much power your pump uses, how long it runs, and how much surge power it needs to start up. Keep reading to learn what size inverter is recommended for AC well pumps and the models that work best for. . By carefully selecting and configuring an inverter that meets the specific requirements of your water pump, you can reap the benefits of energy efficiency, variable speed control, and extended pump life. I power my 1/2hp 120vAC water pump with my 3000w (24vDC) without problems. But understand that not all 2000w inverters are equal.
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