The cable is fine, high quality and very heavy, but is specifically designed for 50 amp charging. So you cannot use this with a 30 amp supply to charge with this cable.
Bluetti is very poor at explaining the requirements for the accessories available for its power units. Every situation is unique in regards to how to connect power and supply. Sadly not every solution currently available works with every situation. Mine did not and i'm now having to return this cable because it didn't work in my situation.
So understand the limitations before purchase.
AC Charging Cable For Split-Phase Function
Got to have it for split phase ac charging for ep500 pros
Select your country or region