Photovoltaic and solar thermal technologies depend on the sun but at night or when the sun is down and you need power? Can solar energy be stored? The answer is yes
There are two ways to store energy
A- Storing Photovoltaic Energy: Solar panels cannot produce power at night time or all through cloudy periods. But rechargeable batteries can store electricity: the photovoltaic panels charge the battery during all through the day, and this power can be drawn upon in the evening.
B- Storing Thermal Energy: Residential solar hot water systems - which use the sun's thermal energy to heat water for the home - have a simpler storage system. Water flows through solar collectors on the roof, and then goes to a storage tank where it can be drawn upon as needed.