One of the things that has always bothered me about grid interactive solar inverters is their uselessness when the power goes out - which, of course, is the time you would most appreciate an alternative power supply. Up until now your choice has been between a batteryless inverter that was useless when the power went out, and a battery backed inverter which, of course, requires batteries - and the switchgear, protection and maintenance that is associated with a large battery bank.
(Battery backed inverters are indeed nice but are a lot more expensive to begin with, which is why most people go batteryless.)
SMA has just come out with a batteryless grid tie inverter which has what they call a "secure power supply." On several of their inverters you can now get up to 1500 watts at 120VAC via an auxiliary inverter. Of course this is only available during daylight hours, but 1500 watts is more than enough to run a refrigerator, recharge cellphones, laptops and flashlights and run TV/radios. (And most refrigerators will stay cold overnight as long as you run them all day.)
In fact if you wanted to get fancy you could buy a $149 computer UPS and run your lights all night with it. And when you didn't need it you wouldn't need to deal with it.
This should be a boon to a lot of people:
-People who live in outage-prone areas but don't want to deal with generators or batteries
-People with medical needs (like refrigeration for insulin) who can't afford to be without power for long periods of time
-Survivalists who want to be ready for TEOTWAWKI.