All these cell technologies have operating lives of over twenty years. Wp rating is approximately the amount of power it will generate at noon on a clear day. Wp the higher the Wp rating, the larger the size of the module. Modules can be wired together in arrays to meet any power requirement. Most PV systems need a battery to store electricity to provide power when the sun is not shining, or when electricity demand exceeds the power output of the array.
Examples are marine and golf cart batteries.
There are batteries being sold specifically for the remote home power market. A variety of battery technologies are available, but lead-acid is the most common. When planning a PV system, you should carefully research battery characteristics, availability, maintenance requirements, replaceability, and recycleability. A charge controller is necessary to optimize battery life. The most basic controllers keep the battery from being overcharged.