Just wanted to share my experiences with install the Hyper Engineering SureStart, following the advice from YouTube, this forum and Reddit
I installed the SureStart SS1B16-32SN for my Carrier Comfort 15 AC and it brought the inrush current from 110 amps down to 39 amps.
The first run brought it down to 56.2 amps. The second run brought it down to 46.8 amps. The third run brought it down to 41.8 amps. The fourth run brought it down to 39.4 amps. The fifth run brought it down to 33.7 amps. The sixth run brought it back to 39.3 amps. The seventh run brought it down again to 34.1 amps. The eighth run brought it back up to 39 amps.
For the 8 AWG red wire that is provided, I bought this ring terminal from Home Depot: 8 AWG 1/4 in. Tab Ring Terminal, Vinyl Red.
For the small green terminal screws, you will need to have a small flat head screwdriver like from a small screw driver set.
For mounting the plastic bracket, that holds the SureStart, to the sheet metal, I used four hex sheet metal fasteners. The size is 8x1/2 which is perfect because the hex head doesn't jut out much and allows for the SureStart unit to snap into the plastic bracket.
To install the plastic bracket, I used blue tape to dry fit the plastic bracket first on the sheet metal. Then I used a drill to pre-drill holes for the hex screws. Then I just screw on the sheet metal fasteners by hand.
Now my two Tesla Powerwall 2s can start the AC when disconnected from PG&E!