Solar heating works by either forming electricity to power a heat pump, or by getting energy directly from the sun through roof-top panels. See how solar power can heat an entire home with helpful tips from alternative energy specialists in this free video on going green. http://tinyurl.com/b3k3y6f
You gain(save) a lot if you do it properly. You need to work out the cost against 5 years of power saving. After that the gain is almost to good to believe.
Of course it is profitable. Initially you may have to pay a lot to install the solar power. But, for a long run it would be beneficial for you for sure. For more information please log on to http://www.reasystems.com.au/.