Galvanic Isolator 500a Surge with Extra Protection & Status Alert


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Galvanic Isolator with Status Monitor.

SKU: Gi120/P/SA Categories: , ,


Galvanic Isolator – Plug In – EXTRA Protection – Status Alert

Surge Protection to 500 amps

galvanic isolator with lifetime warranty

LIFETIME Guarantee


Fitting a Plug In Galvanic Isolator couldn’t be simpler. You don’t need any electrical knowledge or tools, and fitting takes about 30 seconds. And it’s guaranteed to work just as well as the wire-in type. 
status monitored galvanic isolator showing how lights indicate different fault conditionsThis model offers EXTRA Protection over standard galvanic isolators.

The most obvious benefit is the Status Alert Indicator, which constantly monitors your boats earth connection for faults that could lead to corrosion of the hull, or even life threatening mains voltage earth leakage faults.

Bright, easy to read indicators warn you immediately a problem is detected.


Extra Protection. Under the bonnet, there is our “2-stage Protection System”, which protects your hull against electrical noise and Galvanic & Stray Voltages up to twice as high as a normal galvanic isolator.

image showing how electrical noise can adversely affect the operation of galvanic isolatorsExtra Protection is strongly advised – especially if you have electronic items on board.

Most electronic equipment, mobile phones, computers, TV’s etc have “switch mode power supplies, and these can introduce electrical “Noise” into your boats electrical system. In extreme cases, the noise can defeat single stage galvanic isolators, so we have developed our Extra – Protection System to give you added protection.

How It Works…

Check your earthing at a glance.

galvanic isolator how to read fault indicator lightsBoth Lights OFF: Your galvanic isolator is operating normally. No action required, so just check back occasionally to ensure that all’s well.

One Light ON: If either of the lights are on, it indicates DC leakage. This can cause severe corrosion to your boat. Our instructions give clear basic advice on how to resolve the problem.

BOTH lights ON: If both lights are ON, this indicates AC leakage, usually from the mains wiring or a connected appliance. AC leakage can be a danger to life. Please see instructions for help in rectifying the problem.


electrical supply post on marina shown with plug in galvanic isolator connected to protect the boats hull from corrosion

Our Gi120/P/SA Plug In Galvanic Isolator simply connects between your shore supply and the mains inlet of your boat. You can fit it at either the boat end or the shore end. The picture shows it fitted at the shore end.

■ Status Alert Indicators

■ Extra Protection

■ Uses NO power

■ 100% Maintenance Free

■ 30 Seconds to Fit

■ LIFETIME Guarantee

This galvanic isolator is designed to STOP Galvanic AND Leakage currents in their tracks, whilst ensuring that the safety electrical earth is unaffected, so you remain FULLY PROTECTED from electrical faults. Its a quick, simple no-compromise solution to the corrosion that YOUR boat will almost certainly be suffering unless you have a galvanic isolator fitted. Plus our 2-Stage Protection System gives you protection against voltages of up to TWICE that of a normal galvanic isolator.
plug in zinc saver galvanic isolator with status monitor

galvanic isolator with lifetime warrantyThe Gi120/S/SA has a LIFETIME guarantee against faulty materials and manufacture. We also offer a FREE checking service for your peace of mind. (You may want to get your galvanic isolator checked in the event of a major electrical fault, lightning strike etc).


16a galvanic isolator connector with dimensions. You must have the right isolator to match your marinas mains supply and your boats electrical input sockets or the connections won't fitIf your mains connecting cable has a socket that matches the measurement in the photo, this is the correct galvanic isolator for you.


Galvanic Isolator Specification

LIFETIME Guarantee
Voltage: 110 – 250Vac
Surge Current 500A
Connector size 16A
30 second install time
Extra Protection
DC Status monitoring: YES
AC Status Monitoring: YES
2-Stage Protection: YES
Temperature Range -50c to 120c
Fully Waterproof body to IP66
Connectors Waterproof to IP44
Quality Construction
Fit & Forget operation
The GI120/P/SA galvanic isolator is suitable for shore supplies that are protected by a RCD (Earth leakage circuit breaker) with a tripping current of 30mA or less, and MCB 16a or less. If in doubt, please contact a qualified electrician, or call us on 0757 807 3490

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