We just took delivery of our X in May. We charge with a 50 amp at home but wanted a back up way to charge when visiting friends. They have 30 amp RV outlets. We ordered the NEMA TT-30P adapter. It is for EV not the RV type. We also have 30 amp RV outlets so were able to test the adapter. It won't work. The company sent a second one thinking perhaps the first one was defective. The second one won't work either. The Tesla charger cord stays red and if you do plug it in (changing the charging volt to 24) it gives an alarm alert. The company doesn't know why it won't work on our new X when apparently they have worked fine on prior year S's. Does anyone know what the problem might be? Thank you.