Is this grid tied? Are people tying these to batteries and then running their appliances off of them? Seems like too little power to properly backfeed the grid.
If it's a hybrid inverter, it just offsets what you pull from the grid. And btw, as long as you have the right voltage and grid-frequency, you can practically push as little as you want. The details and roadblocks usually come in the form of regulation, contracts, meter features, and the utilities trying to stonewall any sort of slow phase-out of people's dependence on them.
