# Yacht Electrician Long Beach | 50A & 100A Systems | Long Beach Marine Electric

> Yacht electrician for Long Beach and nearby harbors: 50A and 100A 240V shore power, generator transfer, isolation transformers. Free estimate. Call today.

URL: https://longbeachmarineelectric.com/yacht-electrician/

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# Yacht Electrician for Long Beach & LA Harbor

50A and 100A 125/250V shore power, generator transfer switching, isolation transformers and digital switching on yachts 40 feet and up.

[Call (562) 374-7233](tel:+15623747233) [Get a Free Estimate](/contact/)

![Marine electrician testing a yacht AC and DC distribution panel beside the generator and engines](/images/photos/marine-electrician-yacht-ac-dc-panel-generator-engine-room-1408.webp)

-   50A & 100A 125/250V shore power
-   Generator transfer switching
-   Isolation transformers
-   Digital switching systems
-   ABYC E-11 AC & DC systems
-   Same-day callback

Last updated: October 6, 2026

[Long Beach Marine Electric](/) connects owners, captains and yacht managers with licensed, insured marine electricians who work as a yacht electrician on larger vessels: 50-amp and 100-amp 125/250-volt shore power, generator and inverter transfer switching, isolation transformers, battery and charging systems, and digital switching. Larger yachts carry more AC load, more charging sources and more complex distribution, and a fault on one of them often means a cancelled charter or a trip that doesn't happen.

## What happens on the first visit

1.  A briefing with the owner or captain: the fault or project, recent work, and drawings or schematics if they exist.
2.  Shore-power path check from pedestal to main AC panel: cords, inlets, isolation transformer or galvanic isolator, ELCI and main breakers.
3.  Generator and inverter transfer check, to confirm sources can never be paralleled and neutral-ground bonding switches correctly.
4.  Load review against the shore-power and generator capacity, especially air conditioning, galley and water-heater loads.
5.  A written report and a fixed price, or a time-and-materials plan for complex troubleshooting.

## What's different about yacht electrical systems

Yachts in the 40- to 80-foot range typically run 50-amp 125/250-volt shore power (two 50 A cords on many), and larger yachts 100-amp service. They have one or more generators, inverter/chargers, multiple battery banks, and sometimes three-way source selection between shore, generator and inverter. Air conditioning is usually the biggest load. Galvanic and stray-current management matters more too, because there's more underwater metal and longer stays in one marina.

The ABYC E-11 requirements are the same in principle, but the consequences of a mistake scale up: higher fault currents, more heat at connections, and more circuits to trace.

## Isolation transformers

An isolation transformer breaks the direct electrical connection between the shore supply and the yacht. That stops galvanic current flowing to neighboring boats' underwater metal, and blocks a marina-side ground fault from reaching the yacht's systems. Under ABYC E-11, a yacht with an isolation transformer installed within 10 feet of the shore-power inlet doesn't need a separate onboard ELCI, which is part of why they're standard on larger yachts with 100 A service. Read [galvanic isolator vs isolation transformer](/guide/galvanic-isolator-vs-isolation-transformer/).

## Generator transfer and source selection

Shore power, a generator and an inverter must never be connected to the same AC bus at once. Rotary selector switches, automatic transfer switches and inverter/chargers with internal transfer all handle this, and the neutral-ground bond has to move correctly with the selected source. Mis-wired transfer is a common cause of pedestal tripping and of damaged generators and chargers.

## Insurance, warranty and who pays

Yacht electrical work is owner-paid, or billed to the yacht's management company. Complex troubleshooting is usually billed hourly at $140–$200/hr in Long Beach, with defined projects priced in writing. Work is documented for the yacht's records and for future surveys.

## What's included

-   50A and 100A shore-power systems
-   Isolation transformer and galvanic isolator work
-   Generator and inverter transfer switching
-   Load analysis and A/C circuit work
-   Multiple battery banks and chargers
-   Digital switching troubleshooting
-   Written reports for owners and managers
-   Captain and crew handover

## DIY vs cheap fix vs proper yacht electrical work

DIY

Cheap operator

Proper marine work

Transfer

Manual, risky

Breaker interlock only

Sources never paralleled, N-G bond switched

Shore power

Adapters

Cords replaced

Full path tested, isolation assessed

Galvanic

Ignored

More zincs

Isolator or transformer, readings verified

Loads

Trial and error

Breaker upsized

Load analysis against supply

Records

None

Invoice

Written report, updated schematics

## Related resources

-   [Inverter vs Generator on a Boat: Which Do You Need?](/guide/inverter-vs-generator-on-a-boat/)
-   [Galvanic Isolator vs Isolation Transformer: Which Does Your Boat Need?](/guide/galvanic-isolator-vs-isolation-transformer/)

## Sources

-   [Cruising World: ABYC E-11 ELCI and isolation transformer exception](https://www.cruisingworld.com/?p=40379)
-   [Panbo: GFCI and ELCI breakers can be confounding](https://panbo.com/gfci-and-elci-breakers-can-be-confounding-but-heed-their-warning/)

Yacht down before a trip?

Call for a same-day callback. Urgent faults are prioritized.

[(562) 374-7233](tel:+15623747233)

Mon–Sat 7am–6pm · Free estimate within 24 hours

Standards applied

-   ABYC E-11 (AC & DC systems)
-   ABYC A-28 (galvanic isolators)
-   NEC 555.35 (marina GFPE)
-   125/250V 50A & 100A service

[Estimate your cost](/tools/marine-electrical-cost-estimator/)

How it works

## How yacht electrical systems works

1.  01
    
    ### Brief
    
    Owner, captain or manager describes the fault or project. Same-day callback.
    
2.  02
    
    ### Survey
    
    Shore power, transfer and loads checked; schematics reviewed or drawn.
    
3.  03
    
    ### Price & schedule
    
    Fixed price or a time-and-materials plan, scheduled around your plans.
    
4.  04
    
    ### Commission & report
    
    Systems tested on every source; written report for the yacht's records.
    

Get yacht electrical systems at your slip today

Same-day callback. Written price before any work.

[Call (562) 374-7233](tel:+15623747233) [Get a Free Estimate](/contact/)

Straight answers

## Yacht Electrical Systems questions

### Do you work on 100-amp shore power systems?

Yes. Electricians booked through Long Beach Marine Electric handle 30A, 50A and 100A shore power, including dual-cord 50A setups and isolation transformers.

### Does my yacht need an ELCI if it has an isolation transformer?

Under ABYC E-11, an isolation transformer installed within 10 feet of the shore-power inlet removes the requirement for a separate onboard ELCI at the main disconnect.

### Can work be scheduled around charters or trips?

Yes. Tell us the boat's schedule when you call and the work is planned around it, with urgent faults prioritized.

### Can you work with our yacht management company?

Yes. Reports and invoices can go to the owner, captain or manager, and findings are written up for the yacht's records.

### Who does the work, and how do I know they’re qualified?

Long Beach Marine Electric is a free service that connects you with an independent, licensed and insured marine electrician who holds the American Boat & Yacht Council (ABYC) Marine Electrical Certification. Ask your electrician for proof of license and insurance before work starts.

## Related services

[Shore Power RepairPedestal keeps tripping, burnt inlet, no AC at the panel. Covers 30A and 50A inlets, cords, ELCI breakers and leakage faults.](/shore-power-repair/) [Marine Inverter InstallationPure-sine inverter/chargers sized to your loads and wired with proper transfer switching, so they don't trip the pedestal.](/marine-inverter-installation/) [Galvanic Corrosion TestingZincs gone in weeks? Covers reference-electrode testing, galvanic isolators and isolation transformers for crowded marinas.](/galvanic-corrosion-testing/)

Get a yacht electrician on board

[Call (562) 374-7233](tel:+15623747233) [Get a Free Estimate](/contact/)