Perhaps the strongest argument to purchase a solar water heating system is the financial savings you can make.
Once installed, solar panels will convert light into energy which will be used to heat water. This will significantly reduce the amount of expensive fossil fuel you will need to heat your water.
For example, by using less gas you will save money each month on your fuel bill. In just 8 years these savings will have added up to equal the intitial cost of the panels and installation. This is the payback period; after this point, each saving you make is purely profit.
Considering that solar hot water heating systems SIG Sustainable Solutions offers are expected to last 35 years, the total return on investment can be very large indeed.