How to make a solar-powered water heater?

The 'simplest' solar water heater ever, especially suited to those with little space or money can be built in 5 simple steps.
See how : http://www.wikihow.com/Make-a-Simple-Solar-Water-Heater

It is very good

Solar powered equipments are always been made in a very small scaled prototype.
Only few have been converted into full scaled models.

Mainly due to the limitation of solar energy w.r.t. time & location, it is not used widely.

Water heaters, stree lights etc. are the ones used in rural areas for daily purpose & out of option to electricity.

Refer this link for better understanding.
http://www.instructables.com/id/DIY-Solar-Powered-Water-Heater-3-Steps/

This website have many other creative & science related things you may be interested in.

Solar water heaters are available in the market...all we got to do is to install them in our house.

This is the best source for using nature sources.

Well, even I thinks that it should be used and best alternative for having electricity. But may be there are less equipements available in the market.

Available ready made in the market and with government provides subsidies too.

Using solar energy is a good option as it is the need of the hour.

Solar power heater is available in market. Government is also giving subsidy on it. You will also get some rebate in your power bill if you install solar water heater. Good luck