Lighthunter,
No I use AS4777 approved inverters as found on normal 400vdc home solar installs.
The box i built the inverter in is from one of them ( they were 1.5kw inspires from CEHE tech in China. beautifully built too.... but best of all have huge 3kw torroid cores in them, which we rewire to our specs..... these are not single panel inverters as they take up to 150 - 450Vdc for the input, and can do 1.7kw each output.
Here they are again:
This gives you some idea of the size of these things.
once again with the internals on the prototype ( so cheap you just keep making a few spares... have 4 now)
For those interested, here is the screen shot on the scope of the wave form of the input to the transformer secondary from the low switch fets. ... don't panic it comes out the other end as a pure sine wave @ 240vac 50hz... no they are NOT square waves, but a pattern of very very close individual pulse waves of varying widths, that look to us like a square wave unless you magnify it up, then you can see each pulse width making up the "square looking wave"... they are as they are supposed to be for pure sine operation.
This is the effect of a slightly larger choke on that same input wave. The curved short waves are actually the tops and bottoms of the fine pulse width waves from before,
How that small of inductance makes that big a change is difficult to understand......, and when you see the output.... is is a pure sine wave with no distortion.... amazing really...
That transformer is a little one from a name brand 1.5kw Australian inverter that failed, it has more primary turns than original, as it was 24v, but mocked up to be 48v .
The neighbor runs a power jack ( heavily transformered, current bypassed for 6kw cont and zenner over the resistor etc. It now is the frontline inverter for his house, as it performs better in all aspects than his near $10,000 selectronic.......it has been relegated to standby duty... and to start the genny if needed.....
His PJ takes two big grid tie inverters on it's output from remotely placed solar panels .. one normal setup on the power shed with mppt controller, a few kilowatts on the house with grid tie unit and another few kilowatts on the main barn with grid tie unit... about 70 meters spacing I guess.
These things are not toys, they are serious contenders
..........oztules