Hello k.stefan 87 I also have the Jackery 1000 pro with two Solar Saga 80 and the 5 m extension cable from Jackery. Unfortunately, these do not fit with me either. The system needs a cable with DC 8020, but the 5m extension cable is equipped with DC 7909. It fits with the adapter to the Jackery pro but not to the solar module Saga 80 with socket DC 8020. I have not found an adapter from DC 8020 to DC 7909 either. But you can still use the cable if you use the angle adapter from the 2m cable supplied with the Solar Saga 80. This is not needed with the Jackery pro. However, it can only be used between the panel and the solar generator. It does not fit between two Solar Saga 80s. Greetings Werner

Yes, that is compatible.