Please check to see if your system was designed to produce more power than you consume in the summer months (usually May to September). Also check your bills in these months to confirm you have been exporting power and are getting microgeneration credits. If these are confirmed, then go to the Spot Power website to sign up and get all the information you need. Please keep in mind that your retailer will not automatically switch you on and off the solar rate. You need to contact them manually and have them process this.
Spot Power: https://www.spotpower.net/zenorenewables.html