Buy a manual transfer switch and reroute the power from the meter box into the transfer switch then refeed your main breaker box. Then wire the output of the inverter to the free legs on the transfer switch.
This way you can use either solar or line power and no mistakes are made.
Found this video about wiring up a critical load panel where you put your solar powered loads in a sub-panel.
The SunGold inverter will have AC grid power supplied to it (AC in?) , so if my batteries can't keep up, the grid will take over ?
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