Generac — Automatic Parallel
Operation · Paralleled gensets
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, John Deere 6068HFG05 / 6068HFG06 engine
Procedure
- Verify the units to be paralleled are OFF.
- Secure all electrical connections to each unit and a common bus; verify wiring is properly color coded or labeled.
- Connect MSC cable(s) and terminating plugs (resistors) to the end units.
- Turn the battery disconnect ON.
- Connect two wire start signal (dry contact closure) to all generators on the MSC network.
- Turn ON the controller power for each unit.
- Put the controller in AUTO mode.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Generac MDG150 →, Generac MDG175 →, Generac MDG250 →, John Deere 6068HFG05 / 6068HFG06 engine →
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.