What kind of charge controller are you using, and what kind of inverters? I have rarely smoked any of the cheap consumer inverters -- I have a 1kW one that I paid $70 for in my PV system right now. Grounding the nuetral conductor output, or giving it too high of DC input voltage is about the only thing that kills them. Or putting them in a dusty environment that burns the cooling fans out.
Grid tied inverters are probably 90% of PV installations nowadays. Germany, Japan, Spain, and California installed most of the world's capacity last year. Covering shopping malls and such with PV. In thailand the grid voltage may not be as stable, and make connecting difficult, but I think you have the same standards there as in europe (220vac, 50Hz, right?), so getting an inverter shouldn't be hard.
If you have the grid available, it's way easier to do a grid tie system -- no battery cost, and cheaper inverters (I'm assuming you are using large sinewave off grid inverters, not 12 volt consumer inverters -- the consumer ones are much cheaper than grid-tie inverters, but aren't intended to be used for homes). And you don't have to maintain batteries, which alot of people kill pretty quickly.
But, if the grid goes out, you still loose power (unless you have batteries and an inverter that can do both grid tie and battery backup, like the Outback ones).
I personally dislike the utility company here, so I might go off grid for my big system even though I have the grid at my place. But from a strictly technological standpoint, if you have grid power, it's sort of silly to not do grid tie.
Wind is a little different issue -- I think only one company makes a batteryless grid tie inverter for wind, so you options are fewer.
