Safeguard your vessel’s hull, running gear, and crew with the Mastervolt Mass GI 7kVA Isolation Transformer 120V (88000705) from Nomadic Supply Company®. This 7,000VA galvanic isolation transformer completely eliminates the electrical path between marina shore power ground and your vessel’s bonding system — the primary cause of electrolytic corrosion of underwater metal components and the source of dangerous marina stray current shock hazards. It also filters shore power noise and provides stable, conditioned 120V AC output to all onboard systems.
Mastervolt Mass GI 7kVA Isolation Transformer 120V (88000705) Features:
- 7kVA Galvanic Isolation. Completely isolates vessel’s AC system from shore power ground, eliminating galvanic corrosion of propellers, shafts, and through-hulls.
- Eliminates Electric Shock Drowning (ESD) Risk. Breaks the electrical path that creates dangerous voltage gradients in marina water.
- Shore Power Conditioning. Filters voltage spikes, electrical noise, and harmonics from marina shore power before distribution to onboard systems.
- GFCI Protected Output. Built-in ground fault circuit interrupter protection on the output side for crew safety.
- Built-In Ammeter and Voltmeter. Front-panel meters allow monitoring of input voltage and output current for load management.
- 120V / 60Hz Input and Output. Designed for North American shore power standards with 1:1 isolation ratio.
Mastervolt Mass GI 7kVA Isolation Transformer 120V (88000705) Specifications:
- Power Rating: 7kVA (7,000VA)
- Input Voltage: 120V AC / 60Hz
- Output Voltage: 120V AC / 60Hz
- Isolation Type: Galvanic (1:1 transformer)
- Protection: GFCI output, overload, thermal
- Weight: 23.8 lbs (10.8 kg)
- SKU / MPN: 88000705








