Mastervolt Mass GI 7 Isolation Transformer – 7000W | 88000705

The Mastervolt Mass GI 7 Isolation Transformer (88000705) is an advanced marine isolation transformer engineered for safe, reliable, and efficient shore power isolation. Utilizing the latest high-frequency switch technology, the Mass GI delivers exceptional performance in a compact and lightweight design compared to traditional transformers.

Designed for both 120V and 230V AC systems, the Mass GI 7 supports flexible installation in virtually any position on a wall or floor. Its vibration-free and silent operation eliminates the need for rubber mounts, making it ideal for marine environments where comfort and space efficiency are critical.

The integrated Soft Start technology reduces inrush current during shore power connection, while MasterBus compatibility enables remote monitoring and operation through Mastervolt control panels. The system also includes automatic generator activation capability when shore power becomes overloaded.

Built with a durable marine-grade aluminum housing and professional strain-relief cable connections, the Mass GI 7 complies with both CE and ABYC marine standards.

Key Features

• 7000W marine isolation transformer
• Supports both 120V and 230V AC systems
• High-frequency transformer technology
• Compact and lightweight design
• Silent, vibration-free operation
• Integrated Soft Start technology
• MasterBus compatible
• Parallel operation capability for increased capacity
• Marine-grade aluminum casing
• CE and ABYC compliant

Benefits

Compact & Lightweight
Advanced high-frequency technology drastically reduces size and weight compared to conventional transformers.

Silent Operation
No humming or vibration for improved onboard comfort.

Safe Shore Power Connection
Integrated Soft Start minimizes shore power inrush current.

Flexible Installation
Can be mounted in virtually any orientation on walls or floors.

Technical Specifications

General Specifications

• Model: Mass GI 7
• Part Number: 88000705
• Power Output: 7000W
• Input Voltage Range: 90–255V AC
• Output Voltage: 90–255V AC (±5%)
• Input Frequency Range: 45–65 Hz
• Output Frequency Range: 45–65 Hz
• Nominal Input Current at 230V: 32A
• Efficiency: >93%

Physical Specifications

• Dimensions (H × W × D):
  340 × 261 × 250 mm
  13.4 × 10.3 × 9.8 in
• Weight: 10 kg (22 lb)

Technical Features

• Technology: High-frequency
• Cooling: Variofan
• Protection Rating: IP23
• Soft Start: Yes
• MasterBus Compatible: Yes
• No-load Consumption: 44W
• Ambient Temperature Range: 0°C to 40°C
• Relative Humidity: Max. 95%
• Automatic Shutdown Temperature: 80°C

Applications

• Marine shore power isolation
• Yachts and boats
• AC power protection systems
• Marine electrical installations

Ideal For

• Yacht owners
• Marine electricians
• Shore power protection upgrades
• Professional marine installations

Notes

• Suitable for both 120V and 230V AC systems
• Multiple units can be connected in parallel for increased capacity
• Professional installation recommended
• Compatible with MasterBus remote monitoring systems