My husband and I purchased the AC200 Max, plus an extra battery. The cost was a hefty sum for us. We have two tech support questions regarding compatibility from 110V charging sources. As instructed by customer service, we sent an email to tech support. The email came from my email address, but it will be pretty easy to identity which email is ours. There is a link to a site in the email body.
We are excited about our Bluetti power unit, but disappointed with the lack of response from tech support to our email. A response from customer service will not be okay. They have no idea about what we were requesting.