Generac — Manual Parallel Operation
Operation · Parallel system
From a Generac owner's manual covering: MDG150, MDG175, MDG250. Check it applies to your exact model before use.
Applies to: Generac MDG150, Generac MDG175, Generac MDG250
Before you start
- Any crossed connections will prevent units from paralleling.
Procedure
- Verify the units to be paralleled are OFF.
- Secure all electrical connections to each unit and a common bus.
- Connect MSC cable(s) and terminating plugs (resistors) to the end units.
- Turn the battery disconnect ON.
- Turn on the controller power for each unit.
- Put the controller in MANUAL mode.
- Start each unit and allow them to warm up.
- Press the Close Circuit Breaker button on each unit.
Full service-parts list: Generac MDG150 →, Generac MDG175 →, Generac MDG250 →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.