It sounds like a well thought out system. I’d almost cut down my trees to have one!
An old story - I had a job with a company doing solar hot water retrofits, and finally talked my dad into putting one on his house. With the tax breaks, it was cheap but still he wasn’t sold on it.
So, he kept a record on electric bills over the next year or so, and he was proud to declare that his son’s crazy solar contraption actually DID save money! He became our best salesman and had to show everyone how it well it worked.
It does require a well-thought out system to make it work. I'm a software engineer by trade, so I'm used to making a complex system by ensuring the many parts integrate well.
Another thing is inflation rate. Basically, whatever money I save this year increases next year, then more the next year, etc. As my HELOC payments go down because I pay down the balance of the HELOC, the amount I save goes up because energy rates go up. With my current system (no EV, no solar upgrade), at about the end of the 2nd year the amount I save each month on average equals the HELOC payment. From then on I'm in the net positive as far as my checking account goes -- I may still have the HELOC debt but it doesn't hurt my monthly bill paying as much as the power I'm saving helps me (plus the natural gas I'm saving by not having a natural gas bill at all, though exactly how much of that is savings gets complicated because I do consume more power by having an all-electric house). Once I realized that I was sold on the feasibility of getting the system.