I honestly think SGIP is extremely confusing and have been given wrong information by even a CEO of a solar installer. It's very complex and I don't fault anyone for not understanding it. Pretty much EVERY single installer I talked to had really little clue on SGIP and only 1 installer out of everyone I've talked to seems to be on it. This was because the lady was the one who actually handles all their SGIP applications.
I'd say with my 10+ installer research, that percentage of knowledge is less than 10%. It's also confusing because these companies have to deal with 4 different IOU jurisdictions that ALL have their own rules. PGE, SCE, SDGE, etc all have diff requirements/rules/paperwork, you name it.
Assuming anyone at Tesla will "take responsibility" is a joke. By the time you reach anyone at Tesla, 3 months later, that person doesn't even work there anymore. As for your questions on installer allocations, ABSOLUTELY installers are only allocated a certain number of applications/funds. Tesla ran out a long time ago for Small Residential. I think they don't bother with Large installs neither.
PG&E probably has funds for Small Residential since there is still $$ showing there, but Tesla doesn't qualify at all anymore I don't think.
www.selfgenca.com
When I was doing my research, I looked at that link SaveOurPlanet posted and actually targeted an installer that had done some SGIP installs. Some claimed they knew all about it, but wasn't even on the list having ever applied for one. Not that I'll get my rebate (still praying it'll come in and some of us aren't even getting free batteries!), but it's a mess and a horrid experience overall due to no idea if it'll happen, really long wait, no one is ever reachable at CVRP, etc.