Hello again Hoff, sorry I forgot to respond to your call for help.
Let's start with the basics.
Solar is too expensive to be a viable option for the majority of people.
Price has always been about $10 per watt, even shopping around for the best possible price you are still looking at about $5 a watt.
(compare this with a 1Kw Chinese petrol generator available for say $300...plus some petrol of course).
Even with (inefficient) government subsidies the amount of solar installed is minuscule.
So along came CPV. The hope was that by using a small area of (expensive) high efficiency triple junction photocell, the price could be reduced.
Problem is that the cost of reliable accurate tracking devices that are required mean the cost per watt is not that much lower.
High temperatures and thermal cycling stresses mean that there is some doubt about the long term durability and serviceability.
Add to this the many dodgy operators like GGE and Sunrgi who have made hugely exaggerated performance claims.
A number of frustrated would be Sunpube buyers started a self help forum SunGrid
If you go to the start of that forum you can see the many ideas that were kicked around.
Unfortunately it fizzled out after Watson started "contributing"
and is now heavily censored because the forum owner doesn't want to upset Watson.
I'd love to see the price/performance of solar follow the same pattern of Personal Computers and consumer electronics and improve by many orders of magnitude.
I don't really believe there is a conspiracy by manufacturers to keep the price high. The price is headed downwards but we really need to get down to about $1 a watt before we'll have a huge public take up of solar.
I'm still working on the problem and I'll be happy to help you if and when I can find the breakthrough idea.
BTW I have a friend in Belise which is in your part of the world.
He knows a lot about solar also.
Good luck with it all.
Keef