I'm not sure where Tri (video above) lives but with our Northern California utility, PG&E, the process is different. The array generates in parallel with the utility and this causes the meter to slow down or even run backwards (selling power). At night the meter runs forward and we're buying (no batteries). It goes this way for the entire year, buying and selling kWh, and then comes the settle-up date. The NET kWh for the year (still broken down in demand periods) is charged. That month there is an electric bill that will likely be much different than just the meter charge. It is called "net metering".
This net metering is nice because it doesn't presume you have batteries to cover the nightime hours. It also accounts for the fact that the best generating periods are also the high $ periods in terms of cost/kWh (on-peak, part-peak, off-peak rates are different). So, if you aren't home and your HVAC isn't running and it's "on-peak", everything you generate is being sold at the highest rate. At night, when you can't generate, you are buying at the "off-peak" (low cost/kWh) rate. Hint, run the HVAC at night! Buy low, sell high!
I watched the video and there is nothing wrong with any of the claims. Tri only had a partial month and this is pretty useless. More appropriate is to check out year-over-year assuming comparable weather. But any way you cut it, the payback will be longer than 10 years. If the project is financed, the payback will increase. There's a question in my mind as to whether I would buy into a 10 year payback. That's why we went with the Power Purchase Agreement. We didn't front anything but we paid for the energy at around half of the utility rate.
We paid nothing and got our electric bill cut in half, what's not to like!
I like that roof system. Unfortunately, our roof will last for centuries so we won't be in the market for a new roof any time soon.
As to the factory claims, watch out as they shift percentages and dollars. Every installation will be custom.