There are a number of sites, which offer advice and information on alternative energy.
The Centre for Alternative Technology (CAT) outside Machynlleth (see links).
Homepower is an American site for a renewable energy magazine (see links).
CPRW (Council for the Protection of Rural Wales) for information on wind farms (see links).
Listed below is a sample of suppliers of alternative energy equipment. This is not a comprehensive list.
The following sites are worth a visit
British Wind Energy Association
American web site
www.bergey.com ( suppliers of equipment)
International wind energy market place