ANG ISO-BOOST™ Automatic Boost Voltage Increase
Available electronic set-up for USA and European boats.


ANG ISO-BOOST TRANSFORMER™ combines an Isolation Transformer with a Boost Voltage Increase Circuit in order to provide the automatic rise of line voltage and the complete safety to your boat.

Our Marine Isolation Boost Transformers (IsoBoost) provide the correct voltage to the onboard equipment as well as preventing turning off in the event of a sudden voltage drop or damage in case of excessive increase (within a given range).

Our Marine Iso-Boost Transformers ensure the protection of all the marine electrical equipment.

The output voltage is boosted if the supplied voltage is too low.

ANG Boosters


The perfect replacement for your old “Charles Marine”
Isolation Boosting Transformer

Steps Three (3) steps Two (2) steps
Transformer Toroidal Traditional
Soft Start Integrated Optional
Auto Restart Integrated Optional
By-pass Integrated Optional
Electronic Switching Seamless system Mechanical Contactors
Weight Lighter Heavier
Models Available 7 2
Warranty 2 years 1 year

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ANG-BOOST™ has the static system with Seamless technology, the soft start, auto-restart and by-pass systems as standard features, while for the Charles Iso-Boost these were all optional.

Moreover, ANG-BOOST™ transformer is lighter than the Charles Iso-Boost and is available in seven (7) models, all equipped with Toroidal Transformer, the new generation and the best quality transformer on the market.
In addition, ANG-BOOST™ has three steps (two steps up 15% and 7.5%) while Charles Iso-Boost only had two steps (one step up 15%); the ANG-BOOST™ steps are adjustable, a feature not available for Charles isolation transformer.

comes with a 2 year warranty, whereas Charles Iso-Boost had only a one year warranty.

Main Features

ANG ISO-BOOST™ is CE and ISO 9001 certified, it is manufactured with UL CERTIFIED components and complies with ABYC E-11 Standards.

SEAMLESS SYSTEM: ANG-BOOST™ is provided with SEAMLESS transfer system in order to avoid power interruption during the switching. The system automatically chooses the optimal point of switching without loss of power.

OVERLOAD ENDURANCE: ANG-BOOST™ is designed to withstand 30% overload for at least one hour.

ELECTRICAL PROTECTION: ANG-BOOST™ is provided with a protective shield. The shore grounding conductor is connected to a shield between primary (shore) and secondary (boat) transformer windings. This shield assures isolation on the boat for electrical protection.

BY-PASS SYSTEM: ANG-BOOST™ is provided with manual By-Pass system that allow to manually disconnect the Boost mode in case of breakdown and supply power from the shore. The by-pass system guarantees the isolation protection on the boat.

SOFT START SYSTEM: ANG-BOOST™ is provided with Soft Start System that assures the minimal current in-rush during the power up of the system.

FULL OUTPUT POWER GUARANTEED: ANG-BOOST™ ensures full output power even in boost mode. The output voltage is always stable.

AUTOMATIC THERMAL PROTECTION: ANG-BOOST™ is provided with a thermal protection that automatically shuts down the system until the temperature returns to a normal level. The unit will automatically restart when the temperature returns to a safe operating level.

AUTO-RESTART: ANG-BOOST™ automatically restart after high voltage, low voltage, blackout, and overload. ANG-BOOST TM is equipped with very low peak transformers.

The ANG-BOOST™ is provided with cooling fan system.

STATIC SYSTEM: the static switch doesn’t need any maintenance, the only required maintenance is the filter cleaning.

ANG ISO-BOOST™ increases the output voltage in two steps up: 15% (1st step) and 7.5% (2nd step).

1′ Step: from 175V to 209V + 15%

2′ Step: from 210V to 227V + 7.5%

3′ Step: from 228V to 253V non-Boost Mode (Shore Supply)

The result is a more balanced power supply, eliminating over-voltages in the range 200/205 Vac and increasing the voltage in the range 205/227 Vac.

ANG ISO-BOOST™ covers a wide voltage range gradually increasing the output voltage. (see comparative graph)

Aluminum Construction, Antirust.

2 year International Warranty

ANG Boost marine rules

Complies with ABYC E-11 Standards.
Declaration of Conformity:
All A.N.G. USA Inc. products are in conformity with UNI CEI EN ISO/IEC 17050-1:2005 and UNI CEI EN ISO/IEC 17050-2:2005 standards.
We, A.N.G. USA Inc. 3200 S. Andrews Ave, suite 207 Fort Lauderdale, FL 33316, hereby declare that the product below conforms to the relevant requirements of the appropriate EU directive.
All components are UL CERTIFIED.
Applicable UE Directives:
2006/95/CE (EU Directive on Electrical equipment designed for use within certain voltage limits).
2004/108/CE (EU Directive on Electromagnetic Compatibility).

Harmonized Standards:
CEI EN 55022:2006 Information technology equipment. Radio disturbance characteristics. Limits and methods of measurement.
CEI EN 61000-4-2/A2:2001 Electromagnetic compatibility (EMC). Part 4: Testing and measurement techniques. Section 2: Electrostatic discharge immunity test.
CEI EN 62040-1-1:2003 Uninterruptible power systems (UPS). Part 1-1: General and safety requirements.
CEI EN 62040-1-2:2003 Uninterruptible power systems (UPS). Part 1-2: General and safety requirements.

Toroidal transformer


ANG Boost output voltage and input shore voltage

ANG ISO-BOOST™ is designed to power the boat from a nominal voltage of 120/240 V with three operating thresholds:

  • Shore Voltage from 178 to 209 V (+/- 3V): output voltage from 210 to 240 V (+/- 3V)
  • Shore Voltage from 210 to 227 V (+/- 3V): output voltage from 224 to 242 V (+/- 3V)
  • Shore Voltage from 228 to 253 V (+/- 3V): output voltage from 228 to 253 V (+/- 3V)

If the input voltage is less than 178V or higher than 253V, the output is deactivated.

ANG-BOOST™ guarantees the maximum output current even in boost mode.

This chart shows the output voltage curve secured by ANG-BOOST™ compared to the Shore Voltage.


ANG Boost Led indicator panel

ANG ISO-BOOST™ provides the LED Control Panel that indicates the operating status of the equipment.
The LED lights indicate the operating status of the ANG-BOOST™
POWER: Green Led Light – Non-Boost mode, Boat Voltage equals Shore Voltage.
BOOST: Yellow Led Light – Boost Mode ON.
Thermal protection automatically shuts down the system until the temperature returns to a safe operating level.
LOW VOLTAGE: Solid Red Led Light
Shore input Voltage below 178VAC, the system shuts down to protect the boat’s electrical equipment.
HIGH VOLTAGE: Flashing Red Led Light
Shore Input Voltage over 253VAC, the system shuts down to protect the boat’s electrical equipment.
BY-PASS: Red Led Light
Manual By-Pass ON, NON-Boost Mode, Boat Voltage equals Shore Voltage, Isolation Protection ON.

ANG-BOOST™ with Seamless technology

ANG BOOST 3.6 kw


ANG BOOST 12.5 kw


ANG BOOST 12.5 kw

ANG ISO-BOOST™ 12.5 kw

ANG-BOOST™ 18 kw


ANG-BOOST™ 18 kw


ANG-BOOST™ 20 kw


ANG-BOOST™ 25 kw


ANG-BOOST™ 30 kw


ang boost isoboost technical specifications

New Product Line: European version

Now available: ANG Iso-Boost 9 Kva and 18 Kva these ANG Iso-Boost has the same features of the US version, but suitable for European boats

OUTPUT 0-230V (Cold Wire)
LOW VOLTAGE input under 180V no output
1st Step: +15% input from 180V to 206V output 207V-> 237V
2nd Step: +7.5% input from 207V to 221V output 222V-> 237V
3rd Step: no boost mode input from 222V to 239V output 222V-> 239V
HIGH VOLTAGE input over 240V no output
Booster 12.5kw

ANG ISO-BOOST™ operating manual

Download operating manual
Download ANG brochure