Solar systems without storage produce electricity to be used immediately. This is rarely effective, since solar energy is mainly generated during the day, when the power demand of most households is low. With a battery system the excess solar power produced during the day can be used when it is actually needed. Without having to change your habits, you:
Battery storage systems for residential use are equipped either with lead-acid, lead-gel, or lithium-ion batteries.
Lead-acid batteries were used mostly in the past, amongst other things, as car batteries. Given their considerable advantages, lithium-ion batteries are becoming increasingly accepted over lead-acid batteries. They have come to be regarded as the standard in photovoltaics in recent years.