Actually, thinking about “earthed centre tapped output” this morning (a slow week for work) I suspect this may be what I have read about known as “V-O-V” generators, and those should not be used for domestic standby or similar installations. My understanding is that in V-O-V generators, the neutral actually has potential, and is NOT tied to 0v like a normal star point. If that is the case, then regular RCD’s will not work and the installation will not be suitably protected.
I would think an inverter generator will not have this output configuration, but I do not know if AVR output generators may still be V-O-V. I believe the clients need to confirm in writing that the wiring of the generator they buy is not a V-O-V configuration before purchase.
