I install deye inverters and solar. First thing I do is tell the customer that he will be monitored by me. As I purchased the equipment the warranty is handled by me. Since the warranty period is for a very long time I need to be able to monitor it so I can make sure the customer isn't abusing...
As an electrician I can honestly say these za plugs are garbage. The contact points wear out really fast, so rather stick to the old school plugs. I have had to replace the za plugs fairly often.