- How Have Expectations For Useful Life Of Utility-Scale PV Plants In The US Changed Over Time? A new report from Berkeley Lab. Overall, the assumed useful life of PV projects now exceeds 30 years, with OpEx dropping by 50% over the last decade. https://cleantechnica.com/2020/06/30/how-have-expectations-for-useful-life-of-utility-scale-pv-plants-in-the-us-changed-over-time/ 18 comments energy