Unfortunately, there is no one simple answer. But renewable energy subsidies and preferential loans and other incentives will help lower the cost of the solar system. The amount of support depends on a number of factors, such as: whether it is an on-grid or off-grid system, whether it is integrated with the building structure, what is the size of the installation and the specific system manufacturer, seller and installer. In systems for heating hot water and heating buildings, the price of the fuel used must also be taken into account. In most cases, you need to count the cost of natural gas or other fuels and electricity to get a more accurate estimate of what profit to expect. You can ask us to calculate the benefits you will have on an annual basis and compare this figure to your annual electricity needs to see how much you can save.