! PAUSE !
Your headed in the wrong direction ! You do NOT want Grid Tie Inverter here !
You will not be selling power to Big Power Co and trying to do so will cost you licensing, installation, certification etc... (per your locale).
You need an Inverter that watches the GRID-AC and can pull from it when IT needs it to charge your battery bank & to provide Pass-Through power while charging.
Basically:
Solar Panels to SCC to Batteries to Inverter to Home. When home get's low, Inverter enables charging "from the grid" and charges the batteries while passing power to the home at the same time. When Batteries are full Grid AC is disconnected and your back on 100% battery. This only requires ONE VAC Grid Line to the Inverter AC Input. This is the same method used as "Home UPS" and for those people doing TOU Shifting (Time of Use billing) where daytime rates are very high but nighttime rates are low. The Inverter is programmed to charge the batteries at night which are used during daytime to save costs.
There are several Inverter/Chargers which can accomplish this. I myself use a Samlex EVO-4024 which has dual AC Input, 1 for Grid AC with built-in ATS and programmable and 1 for GenSet AC with an AGS port (Auto-GenStart). I've programmed mine to take 120V/30A from my genset as I can push 24V/50A from the Charger to the battery bank.
This let's you use the grid as "backup" to your solar/battery system with only one 120V/20a to 120V/30A outlet to support the Inverter/Charger. It will not push power out as it is receiving only from the grid. You would not have to have this certified & approved for grid intertie. There is no need for a DISCO or other hardware as demanded by Grid Power Co's as it's not feeding back.
Please have a look at the Samlex EVO Inverter/Chargers and consider that route. These are Tier-1 products so not cheap BUT not outlandish like others, alternately you can explore Victron (a bit more but high end goodness)
See links in my signature as well as this link for the EVO-4024
4000 Watt 24V Pure Sine Wave Inverter/Charger with 110A Battery Charger + 70A Transfer Switch. Marine grade, heavy-duty power for rv, boat & off-grid.
www.samlexamerica.com
Good Luck, Have Fun.
Steve