Another benefit is you can use stored energy in your battery during utility peak hours. 4-9pm in California costs [a lot] more than any other time of day.
That's unfortunate. I got my 8.25KW system + Powerwall installed through Tesla for ~$26K in 2021. Just got my 26% tax credit this year. Also added a Tesla Model 3 in 2021 to complete the Tesla Ecosystem. Truly a dream come true.
My loan payments are less than $140/mo and I plan to completely pay off the system in the next year or so. Living off the sun is great.