Yeah, an oddity about photovoltaic cells is, over their first six months to a year of operation, their output declines to about half of whatever they originally were supposed to produce, and it stays there for the life of the cell. Also, the Sun doesn’t shine all day, and the day length and sunlight intensity varies seasonally.
Thanks for the info on photo voltaic, I was about to plop down a lot to install solar panels on my home in S Florida.
OTOH, think about where our internal combustion engine is today compared to what it was 100 years ago. Same as rocket and missile systems.Use will promote efficiency, right along with battery technology.