Wrenches,
A few years ago, we compared conventional and MPPT charge controllers and
found power production improvement in only in unique conditions and rarely
over 15%. Now Microinverter and DC maximizer companies are claiming "as much
as 25%" increased electricity production and a booming market. See
http://www.interpv.net/market/market_view.asp?idx=401&code=401&part_code=01
I've been comparing grid-connected microinverters since 1994 when Henk came
out with his OK4U and am not impressed in full-sun (no shade) comparisons.
In 2005, I compared a side-by-side 200 kW system with two 100 kW Xantrex
inverters with a 200 kW system with 74 SMA inverters and saw no difference
in kW or kWh.
Have any wrenches made side-by-side comparisons? Are the claimed
improvements hype or real?
Joel Davidson
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