electr0n

No in South Africa when following the SANS 10142 regulations it states that you should use the Eskom earth . If you have/use a earth spike it should be connected to the Eskom earth as well as to avoid having 2 earth's.There should be only one earth as to avoid a potential voltage between the two in the event of a nearby lightning strike. 

If you happen to have the Kodak OG-PLUS 5.48 RM (Rack Mount) which does have built-in WiFi (but not bluetooth), you may be wondering where to find the WiFi module PN, as I was.  It wasn't displayed anywhere on my device or packaging.  However, it's the name/SSID of the WiFi network that's automatically broadcasted once you turn your inverter on.  So just search for wireless networks on your phone and you should find it - mine was in the form of W0821XXXXXXXXX with default password 12345678.
The attached document explains the Watch Power app setup and connection with a standalone plugin WiFi module, but the built-in one works the same.  Just start from page 3 and enter the PN (SSID) manually during initial registration. 
I also couldn't complete the configuration successfully until I'd rebooted my WiFi router, something to do with DHCP refreshing I'd guess.
icba_wifi_mod_manual.pdf