Do you offer mobile battery replacement for boats?

Yes. We come to your slip, dock or storage yard in San Pedro, Wilmington, Long Beach and our other harbors from Marina del Rey to Newport Beach, remove the old batteries and install the new ones on-site. Each visit has a one-way trip fee by distance, from $30 in San Pedro to $110 in Newport Beach.

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.

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.

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.

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.

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.

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.

Marine Battery Replacement and Charging System Repair

Marine Battery Replacement and Charging System Repair (2)

Boat Battery Installation and Charging System Diagnostics – Mobile Marine Service

Boat Battery Installation and Charging System Diagnostics – Mobile Marine Service (2)

Marine Battery Replacement and Charging System Repair

Marine battery replacement and charging system repair at your slip, dock or storage yard from Marina del Rey to Newport Beach, or at our San Pedro shop. We load test the batteries, check alternator output and look for parasitic draws before we replace anything. The work covers replacing worn batteries with marine batteries sized for your boat and repairing faults in the charging system: alternators, voltage regulators, chargers and wiring. You get a written estimate for the batteries, labor and the trip fee before any work starts.

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$150 /hr

Labor estimate Usually 1–2 hours

Book sends us a ticket; nothing is charged online. Before any work you get a written estimate for labor, parts and the trip fee, and nothing is done without your OK.

Trip fee By distance, one way: $30 in San Pedro, $50 in Long Beach

San Pedro$30
Wilmington, Terminal Island$40
Long Beach: Shoreline, Rainbow Harbor$50
Long Beach Marina, Alamitos Bay$60
Redondo Beach$60
Seal Beach, Huntington Harbour$75
Marina del Rey$85
Newport Beach$110

Farther away: $25 plus $2.50 a mile, one way from our San Pedro shop. No trip fee when the boat comes to our shop, or for plan members. The work of a visit is at least $150; the trip fee is on top.

Registered in California: Breeze Marine Boat Service LLC, San Pedro
Where we work: At your slip from Marina del Rey to Newport Beach, or in our San Pedro shop
Questions first: (213) 693-0224 or submit a ticket

About this service

Reliable Starts

Power to Start.
Power to Last.

The "click-click" of a dead battery can end a trip before it starts. We offer marine battery delivery and installation for heavy-duty AGM and Gel batteries, and test your charging system so the new batteries are charged properly.

Heavy Lifting Included

Boat batteries (8D, 4D, Group 31) are heavy and often hidden in tight, awkward bilges. We do the hard work of extracting the old lead-acid cores and installing fresh, high-capacity replacements.

Smart Charging

Old "ferro-resonant" chargers can boil batteries dry. We install modern 3-stage smart chargers (ProMariner, Mastervolt, Victron) that condition your batteries and help them last longer.

Parasitic Draw Test

Why did your battery die? Replacing it won't fix the problem if a bilge pump or stereo is draining it silently. We test for parasitic loads and faulty alternators to fix the root cause.

The Diagnostic Protocol.

We test before we swap.

Load Testing

We apply a heavy resistance load to your existing batteries once they are charged. If the voltage drops sharply, the internal plates are usually sulfated or a cell is shorted.

Alternator Output

We run the engines and measure the output at the battery posts. If we don't see 13.6V–14.4V, your alternator or regulator needs repair.

Terminal Hygiene

Corrosion adds resistance. We wire-brush every cable lug until it shines, apply dielectric grease, and replace wing nuts with stainless nyloc nuts for a solid connection.

Isolation Check

We ensure your Start Bank is isolated from your House Bank via VSRs (Voltage Sensitive Relays) so you never drain your starting power while running the stereo.

Power You Can Trust.

Premium components for harsh environments.

New AGM marine battery bank installation featuring Lifeline 8D batteries, heavy-duty 4/0 AWG cabling, and Blue Sea Systems safety switches.

Professional installation of a Mastervolt ChargeMaster Plus marine battery charger, showing neat wiring and labeling.

Split-screen image demonstrating the results of a professional boat rewiring service

Battery Technologies.

Choosing the right chemistry for your boat.

AGM (Absorbed Glass Mat) Maintenance Free, Vibration Resistant

Flooded Lead Acid Cost Effective, Requires Water

Gel Cell Deep Cycle, Slow Discharge

Common Questions

How long should marine batteries last?

Typically 3-5 years with proper maintenance. However, deep discharging (below 50%) or leaving them dead for weeks can kill them in a single season.

Can I mix old and new batteries?

Never. The old battery will drag the new one down to its level, shortening its life significantly. Always replace the entire bank at once.

Get Powered Up.

Schedule your battery replacement.

Request Service

When Is It Time for a Boat Battery Replacement?

A boat battery rarely fails without warning. Slow cranking, lights that dim when the bilge pump starts, a battery that will not hold a charge overnight, or a swollen case and heavy corrosion on the terminals are all signs that the bank is getting tired. Age matters too: with proper maintenance, marine batteries typically last 3-5 years.

Before any boat battery replacement, we load test the existing batteries, check alternator output and look for parasitic draws, so a new battery is not drained by the same hidden fault. When replacement is the right call, we help you choose between AGM, Gel and flooded lead acid, and we replace the entire bank at once so old and new batteries are never mixed. It helps if you can tell us the battery size (for example 8D, 4D or Group 31), how the boat is used and how long it sits between trips.