TopOne SSI-200 grid tie inverter from BuyersIsland

 I bought one of these small 200W grid tie inverters, but it wants
14-28V to work (from the PV panels). I'd like it a lot more if it
would work from 11V up. Anyone else have one? I'm going to give it a
good visual inspect and try to see if any part of it seems
understandable. Wouldnt it be neat if I could change a resistor value
and have it work from a battery bank?

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In your DREAMS, Dude....

 
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So you think that commercial items are impossible to modify in
general, or do you think I'm just too stupid to do the modification
myself?

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Take your pick......

 
The one I ordered came  today and I connected it to my 24 volt battery
bank.  I used a kill-o-watt meter (which seems to measure power in
both directions) and it was putting 233 watts back into the grid.  I
turned off everything in the house and my outside meter actually
slowly spun backwards for the first time ever. My amp meter showed
about 10.8 amps @25.2 volts.  This was at dusk so the volts will go up
during the day and may provide more output.  The unit has a max input
voltage of 35vdc and output of 250 watts as written on the back.  The
internal fan would cycle and the unit became warm.  I ran it like for
about 30 minutes before disconnecting. I plan on using it under relay
control as an extra load when the batts are full and the solar panels
have more to give.  I wasn't ready to spend the $2500 needed to
properly connect a big grid interactive inverter, not yet.