Our intention was to make our new WindLily wind accessory backward compatible with all WaterLily turbines we have sold in the past. Unfortunately, due to structural and electronic changes that were required to make the new units safe and reliable, we were not able to make the new wind system compatible with older WaterLily models. This was a necessary step for us to continue to innovate and improve WaterLily to be the best portable power option available anywhere. If you purchased your WaterLily before June 9, 2020 it is likely not compatible. Please contact firstname.lastname@example.org if you are unsure.