But think about the additional saving of potentially not having to connect everything to main power.
Just think of all the heavy power cables going to outdoor lighting that could be replaced with the proposed unit and maybe low power cabling to a control center. (For lights on/off, not controlling Rossi's system)
Add to that all of the lighting that is probably not installed due to cost or logistics.
Just disaster relief would be a huge opportunity.
We start getting to a monster market driver equal to Tesla.