Re: This insane policy failed ten years ago...
"Solar cells get weaker over time as do batteries."
While it's true solar cells do get weaker over time, to put this into perspective the warranty on my recently installed 7kW array states that it will still be capable of around 6kW output in 25 years time - most modern diesel engines (especially automotive types) are unlikely to age as well in normal day-to-day usage and will have required significant maintenance expenditure to even survive that long.