I think you should reconsider, Michel, and here is why:
The $10K expense, although not small from a cash flow perspective, is peanuts when you view it as a marketing and sales investment. If you go to the PG&E website at the link above, you'll see a list of only 6 approved HAN devices, none of which are as good as the ISY. Since ALL PG&E customers have to visit this page to start the process, it only follows that a good number of them will actually view the list of devices - it's a great advertising exposure for Universal Devices.
Now comes the good part: all small and medium business customers in California (PG&E and SCE) will be on mandatory time varying pricing by the end of 2014. For some this is OK, but for quite a few of them it is a problem that can only be mitigated through smart energy management (as is possible with ISY, not so good with HAN displays that require customer action). The utility will encourage HAN use as part of the mitigation. That is about 1,000,000 (yes, one million) potential customers for you.
But wait, there's more: all residential customers will be put on time varying pricing over the next 2-5 years as well, with the same issues. Your potential market there: close to 10,000,000 (yes, ten million) households.
For PG&E only, you can use half of those numbers for your total available market. Spending $10K to reach about 5.5M customers is not a bad deal in my book!