
At 28.6 volts the batteries aren't accepting any more charge, and the excess electricity is getting dumped to a 1500 watt "dump load" -- essentially a big electric heater. And 1.11K watts is pretty much tops for my Bergey 1KW wind turbine. Bergey says it has a peak output of 1300 watts in 25 mph winds. The 1.11KW my meter shows is based on an average of speeds over a 30 second period, so probably I approached this peak today. After 25 mph, the turbine tail "auto furls" and points the turbine blades out of the wind, to protect them from breaking.http://www.fastonline.org/CD3WD_40/CD3WD/INDEX.HTM
For more references, see :
http://www.villageearth.org/pages/Appropriate_Technology/index.php
http://www.green-trust.org/freebooks/
http://echonet.org/repository#:f:All%20Files
http://www.hesperian.org/publications_download.php
http://www.gutenberg.org/wiki/Main_Page