Yes, in a residential photovoltaic (PV) system, solar energy can be stored for future use inside of an electric battery bank. Storage systems turn solar power from a “use it or lose it” resource into a reliable, flexible energy source. Let's take a quick look at each. What is battery storage? Batteries are by far the most common way for residential installations to store solar energy. When solar energy is pumped into a battery, a. PUMPED HYDRO STORAGE: A TIME-TESTED METHOD An alternative to battery storage lies in pumped hydro storage. Pumped hydro storage utilizes gravity to store and generate electricity, whereby surplus solar energy is used. In simple words, it is a system that not only produces electricity thanks to solar panels but also stores it in dedicated batteries to be used when the sun is not shining.