1) sorry for the confusion. No, the utility company will give me a $2k check to hook up the meter to the utility as net metering. If I do an of grid only, I won't get the cash. So feeding the grid is critical, even if it is only 1kw a year.
2/3). Yes, it's is a100amp panel, but we don't actually consume anywhere close. 6-8kw is plenty. So a 60amp pass through would be fine
5). No, it doesn't need to be integrated. I am very open to separate inverter and charge controller. All new, so I don't own it yet. The utility had to approve the inverter to back feed, this I am looking for recommendations before I purchase
7) SBU =solar, battery, utility
8) great info, low frequency required because of surge?
Thank you