I was able to get a quote for $3.00 per watt from this company called Kopp Electric. This was using Trina panels and Solar Edge inverters. I pretty much told them what my target price was and to send me a quote with the equipment details, price, etc. for review. I then sent it to my Tesla rep with hope he'd be able to price match it, but they caught on that the quote had Trina panels so they met me in the middle at $3.27. I had also requested that the inverter they use was SolarEdge because that's what all their competitors were offering and more or less told them that anything other than SolarEdge (like Delta that they tried pushing on me first) would have been a deal breaker. Even after getting me down to $3.27 they tried one last time to get me to agree to Delta. So just be sure you continue to remind them and ask them that the inverter being used is indeed SolarEdge.
The actual contract you sign with Tesla won't list out the equipment. However...the sales rep that I was working with was very transparent in the whole process and send me the final equipment system details page that has in writing the exact equipment being used. In one of the sections, it will list out the exact model numbers of the mounting system, solar panels, and inverter(s) being used.
Happy to send you the contact info of the guy I used. He's based out in Cherry Hill and to be honest, was very great to work with. I still talk to him from time to time even post installation. Also helped that by pure coincidence, he went to the same high school as me (graduated a year later) and we shared the same circle of friends haha.
One thing that I did learn was that apparently Tesla will only price match once. If you want them to price match again after their initial match, they apparently need to have it escalated for approval which is what had to happen with mine. All worked out in the end.