If any manufacturer is likely to make hard cases for a low-production machine like the Enertia, I would think that Givi would be the company. The tough part is finding the mounting brackets for your machine. If you can figure out how to mount them, Givi would be the way to go.
I believe Givi makes Zero's hard cases (as used on their police model) and they also make the bag mount brackets. Photos attached.
In the meantime, there are lots of universal-fit soft and semi-soft throw-over saddlebags available on the market. Most are waterproof or have waterproof covers included. Some of these bags are even designed to be zipped open to double in size. While not as secure as hard cases, they can be easily picked up off the seat and taken with you if you think theft is a concern. Otherwise, you can usually tie soft bags to the frame and other chassis parts securely enough to discourage a random grab. I have been using soft saddle bags for years and have never had anyone mess with them in the 'burbs. Parking your bike in some areas of San Francisco (as an example) might require a higher level of security, though.
