Boat Electrical Repair
Boat electrical repair in Long Beach and San Pedro: wiring, gauges, ignition, trim and tilt, bilge pumps and batteries, fixed at your slip. Book now.
- 11 services
- At your slip or in the shop
Marine Electrical Repair in Long Beach and San Pedro
We diagnose and repair boat electrical systems at your slip, dock or storage yard from Marina del Rey to Newport Beach, or at our San Pedro shop. We trace the fault from the batteries to the panel, find the cause and quote the repair before any work is done.
What the work covers
The core service is marine electrical repair and troubleshooting: dead circuits, tripping breakers, corroded connections and wiring that has been added to over the years. The work also covers:
- Batteries and charging: marine battery replacement and charging system repair, plus lithium LiFePO4 battery conversions and power upgrades.
- Shore power: shore power inspection and cord replacement.
- Corrosion: electrolysis and galvanic corrosion testing, with a check of the bonding system.
- Solar: marine solar panel design and installation.
- Networks: NMEA 2000 networking and digital switching systems.
- Lighting, sound and internet: underwater LED lighting, marine audio upgrades, Starlink installation, and marine electronics installation and repair.
Parts are quoted with the job.
When to call
- Batteries that go flat overnight or will not hold a charge
- A breaker that keeps tripping, or a circuit that works one day and not the next
- A shore power plug or inlet that looks burnt or feels hot
- Zincs that wear away fast, or pitting on props and running gear
- Electronics that reset, flicker or drop off the network
Questions about marine electrical repair
Why do boat electrical problems come and go?
Salt air and moisture corrode terminals and crimped joints. A weak connection can pass a quick check and still fail when the circuit carries current, so we test circuits under load.
Is a lithium battery conversion a simple swap?
Usually not. Lithium batteries charge differently from lead-acid, so the charger, alternator and battery monitor often need changes as part of the job.
Book a visit: submit a ticket with the boat, where it is kept and which circuits are acting up, or call (562) 542-7296.
See also: marine battery replacement and charging system repair.
See also: boat alternator repair marine rebuild and charging system testing.
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#372 Common question asks
Do you offer color-changing underwater LED lighting for nighttime ambience?
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Yes — we install RGB and full-spectrum color-changing underwater lights with wireless remotes, smartphone control, or helm-mounted switches.
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#370 Common question asks
How many lumens do underwater lights need for clear illumination in California marinas?
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It depends on the boat, the water and the look you want. Most recreational boats use a few fixtures in the low thousands of lumens each; larger yachts use higher-output fixtures. We size the number and output of the lights to the boat, the water in your marina and what your batteries can support.
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#368 Common question asks
Can you replace my old halogen underwater lights with new LED units?
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Yes. We replace old halogen or failed fixtures with LED units, often in the existing hull openings so no new holes are needed. Through-hull fixtures are changed with the boat out of the water.
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#366 Common question asks
Will high-intensity underwater LEDs drain my batteries when anchored overnight?
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They can. High-output underwater lights draw a few amps each, so a set left on all night can run down a house battery bank. We check your battery capacity and charging when we plan the job, put the lights on their own breaker and keep them off the engine-starting battery. Switch them off, or use a timer, when you don't need them.
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#364 Common question asks
Are these underwater LEDs safe for Pacific saltwater and heavy marine growth?
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Yes. The fixtures we install are sealed, made from corrosion-resistant materials and built for saltwater. Marine growth still builds up on the lens, so it needs cleaning with the hull, and it is masked when the bottom is painted.
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#362 Common question asks
Can you install underwater LED lights directly at my slip in Marina del Rey or Long Beach?
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Not the lights themselves: they mount on or through the hull below the waterline, so the boat has to be out of the water, during a haul-out at a boatyard or on its trailer for a trailer boat. The wiring, switches and controls can be done at your slip, with a one-way trip fee by distance for each visit: $50 or $60 in Long Beach, depending on the marina, and $85 in Marina del Rey.
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#360 Common question asks
Do high-intensity underwater LED lights improve night visibility around the boat?
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Yes. Bright underwater LEDs light the water around the hull, which helps when docking, boarding or swimming at night. They do not replace your navigation lights.
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#357 Common question asks
Is lithium safe on a boat?
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Yes, when it is installed correctly. LiFePO4 is much less prone to thermal runaway than other lithium batteries, but it is not fireproof: it still needs a battery management system, fusing and correct charging, and we install every lithium bank that way.
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#355 Common question asks
What are the steps of a lithium conversion?
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We start with a load audit of what you run and for how long, then size the bank and plan a layout that fits your battery space. After you approve the written estimate, we install the batteries, DC-to-DC charging or an external regulator, Class-T fusing and cabling following ABYC practice. Then we program the chargers with LiFePO4 profiles and test the whole system before we leave.
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#353 Common question asks
Can you add solar or an inverter with the lithium bank?
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Yes. When solar or AC loads are part of the plan, we design the inverter/charger, solar controller, DC-to-DC charging, fusing and cabling together with the new bank, and set every charging source to a LiFePO4 profile.
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