spaco wrote:

My son and I are planning to build and operate woodgas cogeneration
plants at our homes. We will be delivering as much power as we can
(20KWH to 45KWH)

(...)
Sounds like you need a grid tied inverter (synchronous inverter)
Homepower.org http://www.homepower.com/article/?fi..._pg120_QandA_1 recommends the sma-america brand

The ST36 will pump up to 45kw back into the mains
http://download.sma.de/smaprosa/date...yer-042007.pdf

They have a range of smaller units available too.

Also check out the alt.energy.homepower newsgroup.


--Winston