Hi Folks, I want to connect AC IN from my MAIN Panel to my GROWATT 3000TL via this manner: 40 Amp Breaker (Single Pole) ... Direct Wire into the Inverter. Now.. Is that overkill? The Wire for a 40 Amp Connection (8/3) is pretty beefy and pricey. Is that overkill? I have seen many folks on YouTube use "Old Extension Cords" to power the thing. Seems sketchy. 40 Amp is the Max Charge Current so I assume it should be = to AC in on this inverter. Thanks for your Knowledge...