Solution
Most diesel generators do not allow for a reverse power flow (delivering power back to the facility) and could damage a diesel generator if done.
Since the NHR 9300 converts discharge (or load) power into clean AC power suitable for use within the facility, we only recommend using an NHR 9300 in charge mode when the facility power is generated by a diesel generator. Discharge and Battery operating modes will cause power from the NHR 9300 to be sent back to the facility power.