I don`t want to give you bad advise im no expert but its worth checking out this forum before you take the plunge i would also make sure you will really benefit from micro inverts, the think is the sun may have to be so low for the to have shading issues that the panels maybe be running from ambient light rather then direct sunlight rendering them pointless..
Before anyone recommends micro inverter i would expect them to model the house in a simulator and work out if the extra gains from them out way having a standard inverter..
I have 16x 250w panels going to a Power one inverter that are wired in whats called 2 strings basically the top row of panels act independently of the bottom, i have a huge tree at the back of my house that will cause slight shading for about an a hour a day for 4 weeks a year, my installer worked out i would never recoope the cost of the micro inverter with the extra energy harvested, so compromised on the split strings..
Check out this place
http://www.electriciansforums.co.uk/...-energy-forum/
or try this
http://www.solarguide.co.uk/solar-pv...type=2#factors
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