Dear Chithraa,

“This is a good observation.
Demand for energy storage devices is increasing exponentially. Following are broad guidelines through which we can try to meet the demand.
1) Explore all types of storage devices.
2) Try to take advantage of their unique features. For example, supercapacitors can be charged and discharged 100000 times. So, it has 3 times more life than a lithium-ion battery even after charging several time in a day. Also, supercapacitors are environment friendly.
3) The cost issue can be tackled by increasing production. For that, we have to identify applications which are low lying fruits. This way, we can generate initial demand which will result in reduced price. In turn it will open up newer applications and improved capacitors.
With above points in mind, the clock power supply circuit has been designed. Even though it is a very small power application, it has the potential to eliminate crores of AA batteries. Thereby reducing hazardous waste.
Lastly, use of lithium-ion batteries for stationary applications is a waste of precious resource.
As far as solar panels are concerned, they have a long life of >25 years. Problem is the initial cost. That is the reason the government is offering subsidies. ”

Regards