Re: [RE-wrenches] Solar power Magic

2009-07-27 Thread Bob-O Schultze
Hiya David, If ever there was an argument against the upfront, per-watt incentive in favor of a feed-in tariff, that's it! Bob-O On Jul 27, 2009, at 10:05 AM, David Katz wrote: Bob-O I see a use for SolarMagic from National Semiconductor in large systems with many parallel strings, installe

Re: [RE-wrenches] Solar power Magic

2009-07-27 Thread David Katz
Bob-O I see a use for SolarMagic from National Semiconductor in large systems with many parallel strings, installed by inexperienced contractors who put some of the strings in the shade, not realizing how little you get with minimal shading of one string in parallel strings of modules. They

Re: [RE-wrenches] Solar power Magic

2009-07-26 Thread Michael Welch
Check out Tigo Energy's Module Maximizer, a similar product. They claim that the decreased inverter cost of leaving the MPPT hardware out of the inverter makes up for the cost of the individual module MPPT units. They are working with Kaco to provide this special inverter. They also have the adva

Re: [RE-wrenches] Solar power Magic

2009-07-26 Thread Bob-O Schultze
Hiya Dana, No to all those things, but... I'm told they are about $200 a pop. Say they increased output by a total of 5%. Seems unlikely, but say they did. Speaking in retail, $200 represents what these days... 40 watts or so including racking, give or take? Say you are using a 200W module

[RE-wrenches] Solar power Magic

2009-07-26 Thread Dana
Does anyone have any experience with these units? Do they work with off grid lower voltages? Do they work with all controllers? Do they affect MPPT function positively or negatively? Do they work well with Grid tie? How would you gauge the increased performance? Dana Orze