bonnie
I play a nice person on twitter.
I see this has been clarified in the past several hours since you posted.
Tesla has confirmed my order for installing the 3.0 battery into my 1.5 Roadster. And the Tesla announcement about the 3.0 battery does not state that it can only be installed in some Roadster versions and not others. So my belief at this point is that the 3.0 battery can be installed in any Roadster.
If it turns out that the 3.0 battery cannot be installed into any of the 500 1.5 Roadsters that were built I will be very unhappy.
Really sorry to confirm the rumor that 1.5s are not included in this upgrade. I reached out to get more info. The answer is not what you (or any of us) want to hear.
Unfortunately the 1.5 is not included in the upgrade. Only 2.0-2.5.
The answer is not what you (or any of us) want to hear. Not good news.