[yakak]

The economic advantage in delaying. Given the large build outs and that you don't want to replace panels for 15+ years, a Moore's law like rate of improvement often seems like a reason to wait and pay less for better panels that will have a higher productivity.

[Things4People]

How could this be changed?

[yakak]

I'm not really sure.. Expiring tax incentives for home energy choices seem to deliver points where one knew it was better to invest before the expiration than in the 12-36 months after the credit was gone. Devices reaching limits of a current system can also drive people to buy as devices that are much more sophisticated are often a longer wait than incremental improvements.