Lambourne said the goal is to have 10,000 solar panels providing power to 2500 local homes.
"Unfortunately, the impact of climate change is felt first and hardest by disadvantaged people, which is part of the reason we started this project," he said.
The event, due to take place on Tuesday , will bring together experts from India, Australia, New Zealand and Fiji to discuss concrete examples of how the church is working to transform local communities and help climate change.
More than 8500 people accessed the first two online webinars in the climate-change series.
"People are blown away by the church's involvement," Lambourne said. "Often times there is a desire to help, but this project gives us a chance to walk the talk and practise what we preach by doing something concrete.
"There is a long way to go, but it has been inspirational to see the local community gathering around and offering practical support to get the project up and running."
Other speakers at the climate-change event include Matthew Koshy (India), Jessica Morthorpe (Australia) and France Namoumou (Fiji).
St Andrew's Presbyterian Church, based on Market St South, Hastings, first announced the project in November 2018.