Did you ever receive a copy of the metering contract?
In Minnesota (Xcel), a production meter and a bi-directional meter are required for back feeding the grid. My production meter is only used to perform calculations on how much I will be paid each year, just for production. Currently I get $0.08 kWh for first ten years of production, about $1,200 a year. I have true 1 to 1 net metering, every month I produce more than what I use I get another check at current rates. The only catch is, I can not produce more than 120% of my previous 12 months combined of power used.
If you will get $0.20 kWh, then definitely jump through some hoops. Sounds like you would be leaving lots of money on the table if you don't. I say get that contract and read it closely. Contract should tell you what specific rules/codes you must follow. I doubt it says you are required to have two inverters.
Not an electrician, but wouldn't a production meter just be placed between the A/C output of inverter and the loads it will be feeding. Parallel to the incoming grid feed. Once all loads are satisfied, all excess production is pushed to the grid.
I realize you are in a different state, but if like Minnesota, your payback period will be short. So having a real contract in your hands to review will help you make a decision on what is best for you. Emails sent to you without proper references is not always helpful. The true rules are written down someplace.