It took me 3 phone calls to have it fixed in the end. The technical support guy where I bought the solar panels was unaware of api keys. So first he made me a user with full access rights in the solaredge portal, so I could create the api key myself, but unfortunately the admin tab is not part of ‘full access’.
Then he created the key with my guidance, send me the key by mail, but did saved the key, so I had to call them a third time to asked them gently ‘please create the key and press the save button’. This did the trick …
So long story short: check if the api key is saved in the admin console of the solaredge portal
