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Balmar 621100SV High-Output Marine Alternator Single Foot Mount 100A

Manufacturer

Balmar

<h3>About Balmar: Marine DC Power Since 1981</h3><p>Since its founding in 1981, <strong>Balmar</strong> has built a reputation as one of the most trusted names in marine DC power. For over four decades, the company has focused exclusively on helping sailors and power boaters solve one of the most persistent challenges on the water: keeping batteries charged reliably and efficiently. That singular focus has made Balmar the go-to choice for serious mariners who demand more from their electrical systems.</p><h3>Innovative Alternator Technology</h3><p>Balmar's greatest claim to fame is its lineup of <a href="/12782-balmar-alternators-200087">marine alternators</a> — widely regarded as the highest-output and most dependable alternators available in the recreational marine market. What sets Balmar apart is not just raw output, but smart engineering. Their patented <strong>Smart Ready&reg; Alternator</strong> technology allows the alternator to communicate directly with an external regulator, enabling precise, multi-stage charging profiles that protect batteries and extend their service life. Whether you're running a modest weekend sailboat or a fully outfitted bluewater passage-maker loaded with electronics, Balmar offers an <a href="/12782-balmar-alternator-2412">alternator</a> sized and engineered for the task.</p><p>Marine environments are uniquely demanding — salt air, vibration, and the need for long, uninterrupted charging cycles put far more stress on electrical components than typical automotive applications. Balmar designs its alternators specifically for these conditions, with robust construction and thermal management that keeps performance consistent even during extended motoring passages.</p><h3>Battery Monitors &amp; Charging System Management</h3><p>A high-output alternator is only part of the equation. Knowing the true state of your battery bank is equally critical, which is why Balmar also produces a respected line of <a href="/12782-balmar-battery-monitors-volt-meters-200146">battery monitors and volt meters</a>. These instruments give mariners accurate, real-time insight into battery voltage, state of charge, and current flow — the kind of data that prevents being stranded at anchor with a dead house bank. Balmar's monitoring products are designed to integrate seamlessly with their charging ecosystem, giving you a complete picture of your DC system's health at a glance.</p><h3>Expert Support &amp; a Legacy of Trust</h3><p>Beyond the products themselves, Balmar has long been recognized for its exceptional technical support. Marine electrical systems can be complex, and Balmar's knowledgeable team has a well-earned reputation for helping customers spec the right components and troubleshoot installations. That combination of innovative hardware and genuine expertise is a big reason why Balmar has remained a privately held, customer-focused company for over 40 years — and why the brand continues to be found aboard everything from coastal cruisers to offshore racing yachts.</p>

Part Number

621100SV
09/12/2036 6:29 AM
Sale Price

$761.19

In Stock (6)

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Balmar 621100SV is a high-performance 100-amp marine alternator from the 6-Series line, designed to deliver fast, safe charging for a wide range of battery technologies including standard flooded lead-acid, gel, and AGM batteries. This compact, single-foot mounted alternator features a 1" to 2" adjustable mounting foot and IsoGrd (isolated ground) configuration for enhanced electrical system protection.

Key Features:

  • Dual internal cooling fans for superior heat dissipation and extended service life
  • Smart Ready design compatible with Balmar multi-stage voltage regulators for optimized charging profiles
  • Small case design for easy installation in tight engine compartments
  • Single foot mounting bracket with 1" to 2" adjustment range
  • Isolated ground (IsoGrd) configuration protects sensitive electronics from voltage spikes
  • 100-amp output capacity handles demanding house battery banks and electrical loads
  • Marine-grade construction with corrosion-resistant materials for harsh saltwater environments

The 6-Series alternators are engineered specifically for marine applications where reliable, high-output charging is critical. When paired with Balmar's advanced voltage regulators, these alternators provide precise multi-stage charging that maximizes battery life and performance while reducing charging time. The dual-fan cooling system ensures consistent output even under sustained high-load conditions, making this alternator ideal for cruising sailboats, sportfishing vessels, and auxiliary power applications.

Products specifications

Dimensions

5 3/4" Diameter x 7 1/4" Height x 6 5/8" Length

Features

Back-Up Internal Regulator

Mount Type

Single Foot 1" or 2"

Type

Alternators

Voltage

12 Volts DC

Outputs

1 Output

ISO Approved

Ignition-Safe Design for Marine Gas or Diesel EnginesMeets USCG Title 33ISO 8838 and SAE J1181 Safety Standards

Pulley Groove Type

Single Groove

Rated Output Power - 2000 RPM Hot

71 Amps

Rated Output Power - 6000 RPM Hot

84 Amps

Warranty Details

One Year

I will see if Im Recieving what I planned on ordering

All was as expected. Thanks.

Great experience

Easy to use good pricing. the order was not packaged very well as they placed a case of oil in a big box that was twice the size of the oil and it was packaged with 2 sets of gaskets which ended up getting somewhat smashed, but i think can be salvaged, should really protect shipments better.

good

needed a delivery date couldn't confirm

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