Discrepancy: During Standby power test circuit breakers pop and voltmeter is high.
Possible fix: Static inverter.
Tip: You can look at the static inverter output voltage on the P-5 panel.
Reason: if the output voltage of the static inverter is high the amps will be high also and will pop the circuit breakers. Hopefully it does not damage anything.
Applicable reference: AMM 24-54-00
Thanks to Tom S. for his input !