I’ve looked at financing large-scale solar projects, both in the U.S. and Canada for independent power producers voer the last few years. To date, we haven’t financed any because they just don’t make economic sense (from a lender’s perspective) without the gov’t subsidies because of the very high cost and the lack of reliability. And the govt subsidies are not a given for large-scale projects because they are recovered over a long time, not upfront.
A lot depends on the strength of the sun where you are, the efficiency of your equipment and the load requirement. I have also read and heard about local utilities not paying for the power you return to the grid, citing a lack of reliability. The grid is a complex system of generators and loads and the ISOs need to operate the grid within specific tolerances or it all comes down. Consequently, if you are a producer and your power output is unreliable in terms of volume, they can often choose not to take and pay for your power. This tends to be more of an issue with people that have installed windmills, but it also happens with solar.
Therefore, my suggestion is that you talk to other people in your area, if possible, that have installed solar panels to hear how things have worked out for them.
Ultimately, you may decide to do it even if you don’t fully recover your costs, for other reasons, i.e. the environment, electrical independence, etc. But definitely do lots of homework and don’t necessarily take only one source of information to make your decision.