Marine-Puck DUAL MP6 50A

The Marine-Puck Dual MP6 50A is a high-capacity 12 kVA toroidal marine isolation transformer designed for safe and robust shore power on larger yachts, trawlers, and vessels with dual 50-amp 120/240V split-phase service.

Soft start and boost features included with every unit.

It features two hermetically epoxy-encapsulated toroidal transformers housed in flame-rated non-metallic ABS plastic enclosures, delivering true double insulation with no ground reference to the enclosures or boat ground.

Because the enclosures are non-metallic, they cannot be grounded and provide superior corrosion resistance compared to most stainless-steel alloys in harsh marine environments. The solid epoxy potting compound in each unit locks all internal connections in place, eliminating vibration-induced loosening, shorts, or arcing while preventing seawater ingress. This powerful dual configuration offers the same proven galvanic isolation and electrical safety benefits as single-unit Marine-Puck models, making it the ideal solution for boats with heavy air conditioning, appliance loads, and demanding electrical systems.

Key Benefits

• Stops nuisance GFI tripping on shore power
• Eliminates galvanic corrosion of metal hulls, shafts, and propellers
• Provides true Class II double insulation (no ground reference)
• Hermetically sealed epoxy potting prevents seawater ingress
• Non-metallic ABS enclosures offer superior corrosion resistance
• Quiet toroidal design – no annoying hum
• Up to 50% lighter and smaller than conventional laminated transformers
• Soft-start included on all units
• 104 V and 208 V boost included on all units
• UL Listed Marine (E509703) and Ignition Protected

Technical Specifications Chart

Electrical Notes

All models include 104 V and 208 V boost. Soft-start is standard. The Dual MP6 is typically configured for 240 V primary / 120-240 V secondary service. Full wiring diagrams (boost and no-boost) are supplied with the units and available upon request.

Schematic Information: MarinePuck Brochure

Green ground lead is not used (capped off) – consistent with true Class II isolation.

Mounting

Marine-Puck units mount on top of or below a deck or bulkhead with a single central carriage bolt, flat washer, split lock washer, and hex nut. Input and output wiring may exit from the rear through the mounting surface or radially through the lower rim in any orientation.