A regular solar installation with panels and inverter will typically pay back in 4 - 6 years. It will last about 25 years. 20 years of free electricity! Therefore the bottom line is great. Furthermore it's an investment in the future of the Earth and all its residents. People may tell you it's not worth it. However even though you earn less nowadays for what you produce, the rebates are still very good.
DOES YOUR ELECTRICITY USEAGE SUIT GOING SOLAR?
You could begin by asking yourself how much electricity do you use, and when do you use it?
The reason for this is that heavy use during the day gives a quicker payback. Thus if you work from home, or run a large business using a lot of power during the day, solar will suit you.
However if you work 9 - 5 and use little power during the day, you can gain advantage using timers for your appliances. So either way, solar can be an excellent choice.