Battery Replacement
Sunset Marine
772 Broadway
El Cajon, CA

Service Description

Sunset Marine is here to handle your boats starting and deep cycle battery needs. We are a proud distributor of INTERSTATE BATTERIES; the Marine industries most trusted battery.

Batteries on your boat handle two basic kinds of tasks, starting an engine and running electrical loads like lights, electronics and accessories for longer time periods. To choose a battery, first determine the battery's application and then choose from one of the four battery chemistries: flooded, gel, AGM or Lithium.

Battery application

Starting batteries

Starting batteries, which crank the starter of your boat's engine, are the sprinters of your electrical system. They deliver between 75 and 400 amperes for 5-15 seconds, and then are recharged in short order by your engine's alternator. Like all lead-acid batteries, they are constructed with alternating layers of negative and positive plates with insulation between them.

Starting batteries have thinner and more numerous plates, providing extra surface area to generate high amperage bursts of current. The two drawbacks of this construction are that the plates are relatively fragile in high-impact environments, and that starting batteries do not tolerate deep discharges, which reduce their operating lifespan.

Deep cycle batteries

Your boat's house battery bank uses deep cycle batteries, the marathon runners of the storage system. They power the electrical loads on your boat when no charge source (shore power charger, engine alternator, wind generator or solar panel) is available. Consider them a kind of savings account into which energy is deposited or withdrawn.

Compared to starting batteries, which deliver high bursts of energy for short periods, deep cycle batteries recover fully after being heavily discharged over longer periods because their design features thicker plates with a high content of antimony. Overnight, their use might deplete 50-70 percent of the battery capacity, depending on the house loads of the boat. When the batteries are recharged, energy is re-deposited into the bank, and the process, or cycle, starts over. Generally, deep cycle batteries should be sized to store three to four times the expected amount of energy to be used between recharge cycles.

Sunset Marine Team Sunset Marine is a fully authorized Platinum Service Center for Mercury-MerCruiser, Johnson-Evinrude-OMC, and Volvo-Penta. Our factory trained technicians will fix your outboard motor or marine engine right the first time. Sunset Marine offers the lowest labor rates by a factory-certified dealer anywhere in Southern California.



Our Services Include:

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Some of our other clients include:

  • University of San Diego California
  • Vessel Assist
  • Teledyne Systems
  • United States Navy
  • United States Coast Guard
  • Northrop Grumman
  • Electrical Diagonostics
  • Carbuertor Rebuilds
  • Snyc and Link Carburetor
  • Fuel Injection Repair/Replacement
  • Manifold Replacements
  • Service Gearcase Rebuilding
  • Steering Repair and Replacement
  • Throttle and Shift Repair/Replacement
  • Gimble Bearing Replacements
  • Bellow Replacement
  • Sterndrive Repair
  • Complete Inboard & Outboard Engine Tune-Ups
  • Oil Changes
  • Water Pump Replacement
  • Drive Belt and Hose Replacement
  • Valve Adjustments
  • Engine Diagnostics



Call to make an appointment!
Office Hours:
Monday-Friday: 8:00 a.m. - 5:00 p.m.
Saturday: 9:00 a.m. - 1:00 p.m.