PowerPack worked as power supplement during the common Solar Water Pumping System, which allows the pump to be powered by an AC generator or commercial utility power, besides of solar energy.
Powerpack can keep the system working 24hours per day, and produce a great flow rate than you will see with only solar power.
The solar array remains connected. If the sun comes out again, less power is drawn from the AC source.
A common application is for diesel generator or unstable regions of utility grid. When the sun irradiation is insufficient, just switch on the AC power source, which will work as supplement; And even at night, AC power source can work as pass by.
The PowerPack will power the pump to its full capacity.