There is not even a viable theory for this that I can find. Asking people to invest in this without an established theory as a starting point is not proper.
There is no need for a theory to convince investors to fund a winning project. If a device works, it can be a great investment regardless of the reason it does it. In history there are so many cases of using a technology before its operation is fully understood, and this will happen other times. It is more likely that a scientist will not accept a new device unless he understands how it works, rather than a businessman could address this problem. But the negative advertising that always accompanies the LENR world will surely create distrust in investors. I hope that these prejudices may disappear over time.