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MasterVolt 62002250 AGM 12/225 Group 8D Dual-Purpose Sealed Marine Battery 225Ah 12V

Manufacturer

MasterVolt

<h3>About Mastervolt</h3><p>Founded in Amsterdam in 1991, <strong>Mastervolt</strong> has spent more than three decades engineering power management solutions for the world's most demanding off-grid environments. From the open ocean to remote wilderness campsites, Mastervolt products are trusted by mariners, RV travelers, utility crews, emergency responders, and commercial vehicle operators who simply cannot afford a power failure.</p><p>What sets Mastervolt apart is its systems-level approach. Rather than offering individual components in isolation, Mastervolt designs its entire product ecosystem — chargers, monitors, inverters, and relays — to work seamlessly together. This integration means less troubleshooting, more consistent performance, and a power setup that grows with your needs.</p><h3>A Legacy of Marine-Grade Engineering</h3><p>Mastervolt built its reputation on the water, where vibration, moisture, and unpredictable power sources put equipment to the test daily. That marine-grade pedigree carries over to every product category the brand offers. Whether you're fitting out a blue-water cruiser, a Class A motorhome, or a service van, Mastervolt components are engineered to handle harsh conditions with reliability and precision.</p><p>The brand has also been an early adopter of <strong>Lithium Ion battery technology</strong>, offering customers the benefits of lighter weight, faster charging, longer cycle life, and greater usable capacity compared to traditional lead-acid systems. This commitment to advancing the technology — not just selling it — is a hallmark of the Mastervolt brand.</p><h3>Core Product Categories</h3><p>At the heart of any Mastervolt system is intelligent charging. The brand's lineup of <a href="/11274-mastervolt-battery-chargers-200141">Battery Chargers</a> covers everything from compact onboard units to multi-bank chargers capable of managing complex battery configurations across multiple chemistries simultaneously. Smart charging algorithms protect battery health and maximize lifespan.</p><p>Keeping a close eye on your power reserves is equally important, and Mastervolt's <a href="/11274-mastervolt-battery-monitors-volt-meters-200146">Battery Monitors &amp; Volt Meters</a> give operators precise, real-time insight into state of charge, current draw, and remaining run time. Accurate monitoring is the difference between a confident offshore passage and an unexpected situation at sea.</p><p>Rounding out the core system, Mastervolt's <a href="/11274-mastervolt-battery-isolators-voltage-sensitive-relays-200144">Battery Isolators &amp; Voltage Sensitive Relays</a> ensure that charging sources are distributed intelligently across battery banks — protecting your start battery while maximizing charge to your house bank, without manual switching or the risk of draining critical reserves.</p><h3>Who Chooses Mastervolt?</h3><ul style="list-style:disc"><li>Sailors and powerboat owners who need dependable offshore power</li><li>RV and overland travelers running appliances far from shore power</li><li>Emergency and commercial vehicle fleets requiring 24/7 reliability</li><li>Off-grid homesteaders and solar system builders</li></ul><p>Mastervolt products are the choice of professionals and serious enthusiasts who understand that power management is not a place to cut corners. With a global distribution network and decades of field-proven engineering behind every product, Mastervolt continues to set the standard for off-grid electrical systems.</p>

Part Number

62002250
09/21/2036 8:32 AM
Sale Price

$902.59

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The MasterVolt AGM 12/225 (Group 8D) is a heavy-duty, 12V 225Ah sealed Absorbed Glass Mat (AGM) marine battery engineered for demanding on-board applications. Utilizing advanced glass-fiber technology, the electrolyte is fully absorbed within the mat separator, eliminating free liquid, preventing spills, and requiring zero maintenance throughout its service life. With no gas formation under normal operating conditions and no ventilation requirements, this battery can be safely mounted in any orientation or location aboard your vessel.

Designed as a true dual-purpose battery, the AGM 12/225 delivers both reliable engine-starting performance and sustained service power. It provides powerful high-current bursts for starting engines, operating bow thrusters, and running winches, while also handling cyclical service loads such as onboard lighting, electronics, and entertainment systems.

Key Features:

  • Dual-purpose design — handles both starter and service/house battery functions in a single unit
  • 225Ah capacity (C20 rating) — large reserve capacity for extended onboard power
  • 1,300A CCA (SAE) / 815A CCA (DIN) — exceptional cold cranking performance for reliable engine starts
  • Glass-fiber AGM technology — low internal resistance for rapid, high-current discharge
  • Thicker plate construction — extends overall battery lifespan and supports medium cyclical use
  • Maintenance-free and sealed — no water additions, no corrosive fumes, and spill-proof
  • Universal terminal compatibility — removable M8 battery poles are compatible with all standard battery terminals
  • Winter-ready — maintains first-rate condition even after extended storage
  • Compatible with 3-Step Plus charging — works seamlessly with MasterVolt chargers and other standard multi-stage chargers
  • Maximum charge current: 63A
  • Two-year manufacturer warranty

The MasterVolt AGM 12/225 is a direct upgrade over conventional flooded lead-acid batteries — the AGM 12/90 delivers the same initial power surge as a 180Ah flooded battery, and the 12/225 scales that advantage further into Group 8D territory. Whether replacing an aging wet battery bank or building out a new marine electrical system, this battery offers superior reliability, safety, and longevity in a robust sealed package.

Products specifications

Battery Type

AGM

Dimensions

9 1/2" Width x 9 3/8" Height x 20 5/8" Length

Group Size

Group 8D

Type

Tapered Stud

Voltage

12 Volts DC

Amperage Hours

225

Best Use

Dual Purpose

Cold Cranking Amps

1300 CCA

Marine Cranking Amps

1300 MCA

Reserve Minutes

474

Warranty Details

Two Years

Shipping took longer than expected as I paid for expedited shipping. I reached out to ask why it wasn't sent two day and got no reply. The customer service could really use improvement and this is reflected in multiple reviews. However, the products arrived safely and as described. I'm very satisfied with the pricing as well. At the end of the day, that's the most important thing.

Great ordering experience

Fast shipment and item as described.

Very easy to buy and good quality.

I paid a little extra for the fast delivery but it was worth it. I got it quickly and it worked great

Great job

I just never do top scores

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