ISO-Boost Transformer for Boats: The Complete Guide to Marine Voltage Protection and Electrical Isolation
Protect Your Yacht from Unstable Shore Power Anywhere in the World
When connecting your yacht to shore power, you expect safe and reliable electricity. Unfortunately, marina power is not always as stable as it should be. Low voltage, high voltage, brownouts, wiring issues, and fluctuating electrical conditions are common problems in marinas worldwide.
These issues can lead to equipment failures, premature wear, nuisance shutdowns, and expensive repairs to sensitive onboard systems.
That is why many yacht owners, captains, and shipyards rely on a marine ISO-Boost transformer to protect their vessels and ensure a stable electrical supply.
Земля ANG ISO-BOOST™ Transformer combines electrical isolation with automatic voltage boosting to deliver clean, reliable power while protecting both your vessel and its onboard equipment.
Whether your yacht is docked in Florida, the Caribbean, the Mediterranean, or any marina around the world, ANG ISO-BOOST™ helps keep your electrical systems operating safely and efficiently.
What Is an ISO-Boost Transformer?
An ISO-Boost transformer is a marine electrical device that combines two critical functions into a single system:
- Electrical isolation from shore power
- Automatic voltage boosting when shore voltage is low
Unlike a standard isolation transformer, an ISO-Boost transformer not only separates the boat’s electrical system from shore power but also actively compensates for low dock voltage.
This dual functionality provides superior protection for your yacht and its sensitive electrical equipment.
Why Is Shore Power Voltage a Problem?
Marina power quality varies significantly from one location to another. Many marinas, particularly older facilities or heavily occupied docks, experience:
- Low voltage conditions
- Voltage fluctuations
- Brownouts
- Temporary surges
- Imbalanced loads
- Aging infrastructure
In the United States and Caribbean marinas, it is common to encounter shore voltages as low as 208V, 200V, or even lower during peak demand periods.
When voltage drops below acceptable levels, onboard equipment may:
- Overheat
- Operate inefficiently
- Shut down unexpectedly
- Experience premature failure
- Draw excessive current
Air conditioning systems, battery chargers, refrigeration units, and electronic equipment are particularly vulnerable to unstable shore power.
The Hidden Danger of Low Voltage
Many boat owners believe that high voltage is the primary threat to onboard equipment. In reality, low voltage can be equally damaging.
Electric motors and compressors often draw higher current when voltage decreases. Increased current creates additional heat, which accelerates wear and may permanently damage equipment.
For example:
A yacht connected to a marina supplying only 208V may struggle to operate air conditioning compressors designed for 240V service. The resulting current increase can shorten equipment lifespan and increase maintenance costs.
An ISO-Boost transformer automatically compensates for these conditions, helping maintain optimal operating voltage.
How Does the ANG ISO-BOOST™ Work?
The ANG ISO-BOOST™ continuously monitors incoming shore power.
When voltage falls below predefined thresholds, the system automatically activates boost mode:
- First Boost Stage: +15%
- Second Boost Stage: +7.5%
- Normal Mode: 1:1 isolation transformer operation
The transition between modes is fully automatic and seamless.
No user intervention is required.
This intelligent operation ensures your yacht always receives the proper voltage while maintaining complete electrical isolation from shore power.
Electrical Isolation: Protecting Your Boat from Shore
One of the most important functions of an ISO-Boost transformer is electrical isolation.
Without isolation, your boat’s AC grounding system remains electrically connected to the marina’s shore ground.
This connection may expose your vessel to:
- Stray currents
- Galvanic corrosion
- Ground faults
- Electrical leakage from neighboring boats
Electrical isolation breaks this connection while still transferring power safely through the transformer.
This protects:
- Propellers
- Shafts
- Trim tabs
- Through-hulls
- Underwater metals
- Sensitive onboard electronics
Does an ISO-Boost Protect Swimmers?
Yes—but only while connected to shore power.
Electrical isolation helps reduce the risk of dangerous stray currents entering the water from shore-connected systems.
This contributes to improved electrical safety around the vessel while docked.
However, once disconnected from shore power and operating solely on generators or batteries, the ISO-Boost no longer performs shore isolation functions.
It is important to understand that an ISO-Boost is designed to protect against shore power-related electrical issues and galvanic currents—not all possible electrical hazards.
Why Choose an ISO-Boost Instead of a Galvanic Isolator?
A galvanic isolator offers basic protection against low-voltage DC galvanic currents.
An ISO-Boost transformer provides significantly broader protection:
| Feature | Galvanic Isolator | ANG ISO-BOOST™ |
|---|---|---|
| Galvanic Corrosion Protection | ✓ | ✓ |
| Electrical Isolation | ✗ | ✓ |
| Voltage Boosting | ✗ | ✓ |
| Protection from Shore Faults | Limited | ✓ |
| Voltage Regulation | ✗ | ✓ |
| Surge Protection | Limited | ✓ |
For yachts that travel frequently or remain plugged into shore power for extended periods, an ISO-Boost transformer provides a far more comprehensive solution.
Ideal Applications for the ANG ISO-BOOST™
ANG ISO-BOOST™ transformers are ideal for:
- Motor yachts
- Sailing yachts
- Superyachts
- Expedition vessels
- Commercial vessels
- Shipyard installations
- New builds
- Refit projects
They are particularly valuable for vessels operating in marinas where shore power quality is inconsistent or unpredictable.
Captains and engineers appreciate the peace of mind that comes from knowing the vessel is protected against voltage anomalies and electrical hazards.
Why Stable Shore Power Matters
Today’s yachts rely on increasingly sophisticated electrical systems.
Modern vessels often include:
- Variable-speed air conditioning
- Lithium battery systems
- Advanced navigation electronics
- Stabilizers
- High-end entertainment systems
- Induction cooking equipment
- Network infrastructure
These systems require stable, clean power to operate properly.
Protecting them is not simply a matter of convenience—it is an investment in the long-term reliability and value of the vessel.
The ANG ISO-BOOST™ ensures that your yacht receives safe, optimized power wherever you dock.
At ANG Power Systems, we believe shore power should never be a source of uncertainty. Our ISO-BOOST™ transformers combine advanced engineering, intelligent voltage management, and marine-grade construction to deliver unmatched protection for your vessel and everyone onboard.
In the next section, we will explore the available models, compare the ANG ISO-BOOST™ with legacy Charles systems, and examine the advanced features that make it one of the most capable marine isolation transformers on the market.
