Abstract: An electric circuit for powering centrifugal pumps includes a power panel of the pump which is connected to an alternating-current distribution network and to the said pump by a power line provided with a timer that regulates the operating time of the pump; which further comprises a solar module comprising photovoltaic panels and a solar micro-inverter connected in parallel to the alternating-current bus of the pump, which converts the direct current generated by the solar module into alternating current and injects same into the pump power line, with the same values of voltage, frequency and phase-angle deviation as the current from the distribution network, when the timer activates the operation of the pump.