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.
-
#352 Common question asks
Will lithium batteries hurt my alternator?
-
They can if nothing limits the charge. A lithium bank can pull more current than a standard alternator is built to deliver for long periods, so the alternator overheats. We fit a DC-to-DC charger or an external regulator with a lithium profile to protect it.
-
-
#350 Common question asks
How much does a lithium conversion cost?
-
It depends on the size of the bank and on what the charging system needs. Labor is $150 an hour, plus the trip fee for work at your boat. We start with a load audit, then you get a written estimate for the batteries, parts and labor, and nothing is done without your OK.
-
-
#348 Common question asks
Is there a warranty on a lithium conversion?
-
Yes. Our workmanship is warranted for 90 days from the invoice date, and the batteries, chargers and other parts we install carry their manufacturer's warranty. We use marine-grade components.
-
-
#346 Common question asks
Do you install lithium batteries at the boat?
-
Yes. We do lithium conversions at your slip, dock or storage yard from Marina del Rey to Newport Beach, or at our San Pedro shop. Each visit to the boat has a one-way trip fee by distance, from $30 in San Pedro to $110 in Newport Beach, and there is none at the shop.
-
-
#65 Common question asks
Do you offer a warranty on new batteries and charging repairs?
-
Yes. New batteries carry their manufacturer's warranty, which depends on the brand and type. Our workmanship is warranted for 90 days from the invoice date.
-
-
#63 Common question asks
Can you diagnose my battery and charging issues?
-
Yes, we offer full diagnostic services. We’ll test your battery’s voltage, cold cranking amps (CCA), and check your alternator output, shore charger, and connections to find the root of the issue.
-
-
#61 Common question asks
How much does it cost to replace a marine battery?
-
Labor is $150 an hour, plus the batteries and, for work at your boat, a one-way trip fee by distance ($30 in San Pedro up to $110 in Newport Beach). A straight battery swap usually takes 1-2 hours; lithium or larger battery bank changes can need charger or wiring changes and are quoted after we see your system. You get a written estimate before any work starts.
-
-
#59 Common question asks
What type of batteries do you install on boats?
-
We install AGM, lithium, deep-cycle, and dual-purpose marine batteries, depending on your needs and vessel type. We’ll help you choose the right size, type, and capacity to match your boat’s electrical load.
-
-
#57 Common question asks
Do you offer battery charging system repairs as well?
-
Absolutely. We repair alternators, voltage regulators, onboard chargers, battery isolators, and shore power connections. We also test your system to ensure proper charging and prevent battery drain.
-
-
#55 Common question asks
How do I know if my boat battery needs replacement?
-
Look out for weak engine starts, dim lights, electronics shutting down, or batteries not holding a charge. If your battery is over 3–5 years old, it’s time for a full test or replacement. We can test it on-site.
-