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Discover KOHLER Marine generators

Factory-installed Paralleling Controller with auto-transfer function

The new Decision-Maker® 3500 controller eliminates the need for expensive switchgear, costly add-ons and complicated installations. Which means you save big on cost and space. It’s automatic and easier to use than ever before.

Instant Auto Transfer and Paralleling

When the first generator’s load is light, the second generator automatically drops off. When the load is heavy, the second generator automatically comes online to provide the power needed to carry the load. Or if one generator is in trouble, the second generator senses the problem, starts up and takes the load automatically.

Instant Auto Transfer and Paralleling
Corrosion & Vibration Protection

Corrosion & Vibration Protection

Fully potted circuit boards and sealed connectors protect the controller and alternator from marine environment conditions and heavy vibration.

Remote Monitoring

Monitor and control your generators from your boat’s existing monitoring system.

Remote Monitoring
Repower-Ready

Repower-Ready

The Decision-Maker 3500 is compatible with existing systems, so repowers are easier than ever. When wired for V-bias/S-bias inputs or droop, it can parallel with existing load-share modules for even more installation options.

Proper Engine Combustion

Our electronically controlled high-pressure common rail fuel system provides just the right amount of fuel at just the right time.

Proper Engine Combustion
Kohler-Made

Kohler-Made

Nearly every component is designed, built and serviced by Kohler. Just the way it should be.