Transfluid HM3350 Hybrid Marine Module

The Transfluid HM3350 is a heavy-duty hybrid module built to slot between your engine and marine transmission — turning a conventional driveline into a hybrid propulsion system without a full driveline redesign. Rated for engines up to 620 kW (830 hp) marine intermittent, the HM3350 gives ship owners and integrators a proven, plug-and-play path to electric propulsion, fuel savings, and lower emissions.

Palmer Johnson stocks genuine Transfluid parts and provides authorized sales, service, and rebuild support for the HM3350 across North America.

• Drop-in compatibility — Standard SAE input/output interfaces mean the HM3350 pairs with existing Transfluid marine gears and most engines without a custom driveline.
• Retrofit-friendly — Compact footprint and short engine-to-transmission spacing make it practical to add hybrid capability to vessels already in service.
• Flexible electric machine placement — The motor/generator can be mounted in multiple orientations to fit tight engine room layouts.
• Come-home capability — Built-in redundancy keeps the vessel moving even if one power source is unavailable.
• Remote monitoring — Optional GSM-based remote monitoring and web portal access for maintenance alerts and service scheduling.
• Tested battery safety — Transfluid's battery system has passed DNV-GL testing, including the 2018 forced thermal runaway protocol, and meets Norwegian Maritime Authority (NMA) Propagation Test 1.