It will also feature a nature zone shining a spotlight on charities and other organisations working to protect the environment.
Good Energy, based in Chippenham, has been at the forefront of clean energy for a quarter of a century.
In addition to supplying electricity backed by power from a UK network of more than 2,000 renewable generators, the company offers bespoke solar panel and heat pump installations.
Head of Marketing, Laura Wildish, said:
You can easily find the Centre at Lydiard Fields just off Junction 16 of the M4.
The NSBRC is the UK’s only permanent visitor centre designed specifically to meet the needs of individual self builders, renovators and home improvers.
Managing Director, Harvey Fremlin, said:
The Festival of Sustainable Homes will be held on Friday and Saturday 17th - 18th May from 9am - 5pm, with plenty of free parking.