Hi shantanu8jan,
Cleantech is obviously a new field and bschools are often slow to incorporate new trends into their curriculum, so you'll need to do some digging to find the right programs. As you noted, UC-Berkeley Haas is the one school best known for cleantech at the moment (we talk about this a bit in our guide to Berkeley's MBA app
https://bit.ly/qzeXEK ). Stanford has a little of this too, given their focus on innovative technologies and location in Silicon Valley - there's lots of solar cos in the Valley as well as Tesla being there now so the cleantech business ecosystem in Northern California is growing, thus these two schools being a good choice for you.
Any other MBA program that has an "energy" focus could also be worth considering - these would include Duke, UT-Austin, to a lesser extent even Wharton and Columbia have a little of this.
Ross has a MS/MBA with the UMich Erb Institute - this is for sustainability so perhaps not quite the same as what you're looking for. Check out their site here:
https://erb.umich.edu/education-programs/mbams/
The other option could be Presidio Graduate School in SF but this is a lesser-known/lower ranked program, so it might not be what you're looking for. They have an MBA in Sustainable Management - again, possibly not "cleantech" per se, but in the same general domain. Website is here:
https://www.presidioedu.org/programs/mba ... management
If you come up with something more specific to a cleantech MBA in your research, please come back and tell us about it! The Haas program is in our understanding the best at this point but that is an uneducated opinion, so please fill us in on what you find.
Best of luck!
EssaySnark