VOV connected homes around the country and legal cannot be used in the same sentence - It is illegal - It is written in SANS 10142-1
The COC is invalid and not worth the paper it is written on and probable done by a handyman.

Extract from SANS 10142-1 Ed3
7.12.2.7 A 230 V generator with a V-O-V earth connection (centre tap on
winding which is earthed), shall not be connected to a fixed electrical
installation.
NOTE Such a generator may be used as a free-standing unit to provide power to
specific appliances.


On a vov genset

Earth to neutral is 110v
Earth to Live is 110v

If neutral is bridge to earth it will sort across the coil


There have been numerous threads on VOV gensets


https://www.theforumsa.co.za/forums/...tor-connection
https://www.theforumsa.co.za/forums/...ative-supplies
https://www.theforumsa.co.za/forums/...-On-Generators