A solar company has proposed a Power Purchase Agreement, or PPA. Are these worth it? Finn Peacock May 14, 2020 02:08 Updated Follow My thoughts on these "solar leasing" or PPA schemes can be seen here.Choice.com.au have also written an excellent article breaking down such schemes here. Related articles My installer says it's fine to have different roof orientations on the same string. Is he correct? We have installed solar, and our electricity bill seems higher than ever. Can you help? I am building a house. Does it make more sense to pre-wire for solar or should we just wait and get it installed afterwards? What documentation should I get with my solar system? Why are bigger solar systems cheaper, per kW of panel installed? Comments 0 comments Article is closed for comments.