Final revision (11/27):
Keep in mind that we are extremely detail oriented and a contractor's nightmare. We know it, but it's clear from the outset they know what they're getting into with us. If there was a 3.5 star rating, we would give that but we are giving them the benefit of the doubt.
LA Solar Group installed a 25 panel Panasonic system, Powerwall 2.0, and a 100A charging circuit for a middle of the road cost (not the cheapest, not the most expensive). It took a little over 60 days from deposit to starting the project. It took a month to complete the solar and about 3 weeks for the battery and charging circuit. Total was again about 60 days. We tried to lay out all the details we wanted in advance some of which related to attachments, methods, etc. They get acknowledged, but still, many of the details get lost in the process.
They have a different team each day. The previous team doesn't care much about the next team. Then if there are multiple parts to the project like ours (solar, battery, EV), the teams definitely don't plan for the next project. It's a big operation and their on-site teams really have little to no oversight. Sure, they send progress pictures and completed task pictures, but that's only a sliver of what goes on. A quality control person or supervisor never steps foot on the property to see it first hand. Simple things like sloppy workmanship, dropping tools purposely, fit and finish, etc. don't show up in those pictures. There are many details that would just get covered up unless you call them on it (e.g., electrical techniques, roof waterproofing techniques, wire gauge selection, sloppy connections, loose fitments, and others). The installers don't use more than tapping their hammer to look for rafters. There are many finder holes under the tiles, and hopefully they sealed them all. Some of the flashings needed to be redone. Some of the permits needed to . In the end, it took over a month for just the solar spread out over 4 days. We are happy with the solar but are still weary about some of the penetrations.
The EV ended up perfect, but was not a priority till the end and needed to be redone after one team installed their standard "EV outlet". With better oversight, they would have known it was to be a 100A circuit for a Tesla Wall Connecter (we provided) with room to expand. After some back and forth, the final product is what was expected and professionally done. I did double check and needed to resecure and torque some of the connections to the specifications here.
The battery was actually installed ahead of schedule. This, I commend them on. But again, the process took an extra day than the planned two days and took about 3 weeks start to finish. Their information of the site wasn't complete. They ended up opening the wall up. I noticed they ran aluminum wire to the gateway (appropriately sized from my inspection) rather than copper. It was clear here that the battery was not initially planned for by the solar installers because several things related to the solar needed to be rerouted. I note this but acknowledge it may have been to pass inspections and PTO for the solar.
The final repairs and touch ups to the walls are acceptable but again, I needed to point out some deficiencies prior to this.
Overall, we have a working system as contracted. For us, the devil is in the details and there were many opportunities for better quality and efficiencies so the rating accounts for this. There were MANY communications required to advocate for ourselves and the rating accounts for this. The senior leadership really wants to gain your trust and approval and the rating accounts for this too. But they are no longer a small installer and had difficulty executing (sales, planning, installation) to our level of expectation.