If I were a participant in Sleepy's, Norse's et al "Contrarian" forum I'd have posted this there, but as I try to be active on only one forum at a time, I'm not, so:
I now have three separate PV systems in place in two locations - AK and AZ. In AK, I have two separate strings, going through two completely separate charge controllers, feeding my waaaaay off grid battery bank and overall elec. system for our compound there. Separate, because I created them at different times; they're separate geographically and have incompatible panels and everything else.
Anyway, the oldest unit, my "test" facility, not only is constrained in size - because I mounted the panels atop a 65-foot high tower I erected and is on a tracking rack - but also, because it now is "ancient" (2008, I think), its panels are a now-minuscule 130W size. Once I get my boom truck back, in early June, I am thinking of replacing them. The most bang I can get for the buck, given that I am absolutely limited in # panels (just 4, but the actual number isn't relevant: it's that I cannot add on by increasing # of panels), is to emplace the largest nameplate cap of most efficient panels on the market, as long as pricing is just about correspondent.
Thus the question: are SunPower's panels the ones that fit the bill? While I would love to wait one more season to learn if their new "X" panels are available, that always has been and for the foreseeable future will be the dilemma of this technology, so I'll disregard that. But how do I get in touch with a vendor of SPWR products?
Lastly, in interest of (fairly) full disclosure, while I have in the past at least gently disagreed with SleepyHead over SPWR - I continue to believe that SCTY's long term prospects are more exciting, my Alt.Energy portfolio - which is a very sizable fraction of my entire investment portfolio, consists of the following. "One part" is approximately equivalent to what I consider for me to be a "full position"...obviously, the $ value for that it is not appropriate for me to divulge. The extraordinary growth of esp. SCTY and TSLA over the time I have held the positions are part of the reason they are outsize holdings; the other reason is that I invested more - at the outset - in those two names, both as $ values and as a % of my holdings, than I ever have in any other companies. Lastly: I do NOT participate in derivatives, and I do NOT invest on margin. Period.
1/2 part Hanwha
1/2 part JA Solar
1/2 part Jinko
1/2 part Yinlgi
2/3 parts Rene Solar
3/4 parts First Solar
1.5 parts GT Advanced
2 parts Clean Energy Fuels
2 parts Canadian Solar
2.5 parts SunPower
4.5 parts Solar City
11 parts Tesla
ALL of these, with the exception of Clean Energy (Boone Pickens's CNG/LNG truck stop filling station network) have, as you know, done extremely well. I never have sold any of these names (nor traded any others in this sector), other than SCTY and a small fraction of TSLA - both of which I later more than re-filled - in order to pay taxes and buy a P85.