About Us
 

We are the Galvanic Isolator experts, and have been manufacturing Galvanic Isolators since 1973. Our reputation for quality and reliability is unsurpassed. We never sell Chinese imports.  Unlike competitors products, our Galvanic Isolators are 100% designed and built here in the UK.

>>>  All our Galvanic Isolators include an AC Bypass Capacitor - Avoid isolators without one <<<


Product Details

Wire In Galvanic Isolator for GRP and wooden craft. Ultra-Low leakage, essential for use with outboards, outdrives and underwater fittings to prevent Galvanic corrosion when in marinas.

galvanic isolator for sailing boatsProtects your boat from Galvanic Currents. ULTRA LOW LEAKAGE gives maximum protection for GRP boats with "soft" metals in the water, such as outboards, outdrives etc. 

 Includes AC Bypass Capacitor - Never buy a Galvanic Isolator without one. 

Warranty: Lifetime 
Ideal for...
Hull Types:
GRP & Wooden Hulls


Water Types: River Water & Sea Water

More Information

GRP vessels need special protection for their metallic parts that are in the water. 

That's because the metallic parts on GRP craft, (Outboards, Stern Drives, Cooling Inlets etc.),  are typically made from "SOFT" metals such as Aluminium, Brass etc, which corrode VERY easily. That's why it's essential to choose a Galvanic Isolator with the lowest leakage possible. This model is designed with specially selected components to give the very best protection for GRP hulled boats.  

Ultra-Low Leakage Protection for GRP Boats
Manufactured in the UK from specially selected components.

Surge Protection to 500amps

Ultra-Low Leakage
AC Protection Capacitor
Fantastic Value
Made in United Kingdom

Easy to fit with normal DIY tools. Full instructions supplied.  
Manufactured in the UK from high quality components, and carry a LIFETIME GUARANTEE.

galvanic isolator with life time guarantee

Wire In Galvanic Isolators are perfect if you are fitting out your boat, or improving an existing electrical installation. A Plug in version, requiring NO installation is available HERE

Compact
AC Protection Capacitor
100% efficient
NO Power loss
Maintenance Free
Fit & Forget
Simple Installation

galvanic isolator narrowboat


AC Protection Capacitor. Absolutely ESSENTIAL if you 
have 240V electrics 
on board. Scroll down to bottom for more info.

galvanic isolator with bypass capacitor

Fitting is  a straightforward job, involving connecting the isolator in the earth conductor between the Mains inlet connector and the vessels distribution board. 
galvanic isolator wiring connections


The isolator connects into the boat's Earth connection using two 5mm studs, as shown in the photo. There is usually NO need to open the fuse board (consumer unit), and you do NOT have to work with live electricity. 

The isolator can be mounted to practically any flat surface, and has a variety of holes for easy fixing, including elongated holes to make alignment simple. Alternatively, it can be fixed using double sided adhesive (not supplied). Please see images for more information.

When the Galvanic Isolator is installed, it prevents Corrosion Currents from forming an electrical circuit using the shore leads earth connection. This completely blocks galvanic currents through the mains hookup cable.



how to wire a galvanic isolator

Installation:
 
Installation simply involves disconnecting the earth cable from the mains input connector on your boat, and connecting it to one of the studs on the isolator. 

The other stud is then connected back to the mains input connector earth terminal. 

In essence, this breaks the earth connection then uses the isolator to span the break. There is normally NO need to work inside the fuse box. We supply full instructions for fitting, which normally tales about 1/2 hour.

We are happy to offer fitting advice, where required.

If in doubt, please consult a qualified electrician. If you would prefer a simple plug-and-play isolator with no installation required, please click HERE 


Specification


Specification Gi-120/S/GRP

  • Voltage: 110 – 250Vac
  • Surge Current: 500A
  • Leakage Typ: < 10uA  
  • Temperature Range: -50c to 120c
  • Dimensions:  145 x 65 x 65mm
  • Quality Construction
  • Fit & Forget operation
  • AC Protection Capacitor
  • FULL lifetime guarantee
The Gi-120/S/GRP 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 us or a qualified electrician. 

This GRP version is denoted by specially labeled packaging. 
About Us

Our Galvanic Isolators are built BY boaters FOR boaters. With over 40 years experience in the electronics industry, we are committed  to producing products that will give you years of service. We are a family business, and sell direct to the public, and also have distributorships in the Cayman Islands, and the Canary Isles. Technical advice is readily available, and even if you're not "techy", please don't hesitate to call us with any questions, and we'll be happy to answer without blinding you with science.

Payment


We accept payment by PayPal, and Credit/Debit card. To pay by card, just select Pay Pal, then use their "Guest Checkout" option.

Shipping

We post goods every day of the week - including weekends. The vast majority of parcels are posted the very same day we receive your order. We use Royal Mail for our deliveries. Parcels are tracked but don't need to be signed for.


Returns
galvanic isolators for narrowboats and wide beams
We aren't happy until you are. So if you've bought the wrong item, or have just changed your mind - don't worry - we'll take it back (and we'll even be pleasant about it).


Contact
how to contact galvanic isolator company
Need more info, got a query, or just fancy talking to us? Please message us through eBay. You'll find us helpful before, during and after your purchase. Technical assistance gladly given. We're available all day, every day.
AC Bypass Capacitors
how to contact galvanic isolator company
AC Bypass Capacitors - Why you need one
A Galvanic Isolator works by blocking "Corrosion Currents". It's simple and cost effective, and thousands are sold every year.
Unfortunately, some manufacturers try to cut costs by failing to fit an AC Bypass Capacitor. It's definitely a false economy. 
Galvanic Isolators are designed to block Galvanic Currents, (which are Direct Current), whilst allowing Alternating Current to pass. Unless a Capacitor is fitted, those Alternating Currents can defeat the Galvanic Isolator and make it ineffective. An AC Bypass Capacitor directs the Alternating Current around the isolator's internal components, so that it can work effectively in all situations.
Without an AC Bypass capacitor, an isolator may work very poorly, if at all. The value (or size) of the Capacitor must be carefully chosen. If it's too low a value, it won't be effective, and if it's too high a value, it may be physically to large to be practical.


Wire In Galvanic Isolator for GRP Craft. 500 Amp. AC Bypass Capacitor.  Ultra Low leakage for best protection of outboards, outdrives etc. Simple installation. Lifetime Guarantee.
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