As with any program, ease of integration (and migration) is a key concern to utilities considering new software solutions.
Hohm is no different.
Michaeljon Miller, the principal architect for Hohm, told me the other day that there have been a lot of such questions concerning Hohm .
In response MJ has published the software specifications for the Hohm interface which is based on web services and is used for linking customer energy consumption data (gas, electricity, water, oil, and propane), customer invoices, and pricing information with the specific customer account in Hohm.
MJ does a nice job of describing the interface at his blog. Check it out here. – Jon C. Arnold