If you are looking to Solar Energy to safe money, you are running in the wrong lane. The real benefit from installing solar panels is not money. It is the effect it has on your kids in greater awareness of their environment.
Nothing teaches them the value of energy and its conservation better than the challenge of trying to juggle what comes in on electricity with what is going out. In our house there is no light or appliance switched on which is not needed. The kids watch it, day and night; and they tell you quick smart if you do not!
Alfred

Considering that the cost of a 1kVA solar unit is about $15000 and that it generally generates power when it is not needed, the subsidy is completely unjustified.

Solar water heaters are far more worthwhile.

PV cells are only eductional in showing kids that they have little value.

I've recently received flyers advertising solar hot water systems with government subsidies around 70% of the installed cost. Looking at my water heating bill and checking the experience of an adjoining house with SHW, I estimate that with very favourable assumptions, my rate of return would be at best 6 per cent, probably less. So the return on the total cost would be well under 2 per cent. There must surely be better options for my and the government's (i.e., our) funds.

Of course, I haven't allowed for any externalities such as reduced CO2 emissions. That's because I don't find the anthropoggenic global warming story convincing; but even if I accepted that CO2 savings were valuable, the return would still be very low. How might it compare with nuclear energy, I wonder?