Many of the better panels use multiple diodes on the panels so that various partial shading does not necessasarily shut down the panel.
I also hav been studying this a lot. It seems like black arts but it is really worth the learning
. Presently, we are planning on the new thin film SANYO panels at about 18% efficiency. Kyorcia and most others are about 11 to 12 %. This will let us install about 700 watts name plate capacity above the bimini
. I think the panels have three internal diode separated circuits.
The only other player in the high efficiency panel world is SOLAR
POWER. They gained promenance by powering a boat on a circumnavigation
but WILL NOT SELL to boaters. WOW! They only operate through their licensed installing contractors. Call the to arrange a team to evaluate your site. Ha HA $$$$$$$$$$$$
I found very good assistance and brain trust at Blue Sky on the charge controllers. They were totally familliar with the various panels and quickly matched my panels and batteries with an MPPT. We will run panels in parallel. Open circuit voltage is about 50 volts. We charge 24 VDC.
Stuff will be ordered in January for spring installation
2012. I read the Federal tax BS on renewables and found reason to be able to claim them on next year's taxes