I had to send my B300 in for warranty work and received a replacement within a week. Annie with technical support was very helpful in the entire process.
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@kwetherington Thank you for your feedback and praise for BLUETTI’s customer service team.
I will pass it on to Annie. 
I really dont get why people dont like the bluetti support. They always kind, offer great solutions and answer really quick.
@kwetherington Good to hear there people out there who can say “thank you” ;)