My Account
Shopping Cart

Mastervolt 62000900 AGM 12/90 Group 31 Sealed Marine Battery 12V 90Ah

Manufacturer

MasterVolt

<h3>MasterVolt: Autonomous Power Solutions for Demanding Applications</h3><p>MasterVolt has earned its reputation as a global leader in autonomous electrical power systems by combining cutting-edge technology with uncompromising reliability. As specialists in the management, conversion, and storage of electrical energy, MasterVolt offers a comprehensive product portfolio with a power range from 300 W to 40 kWatt, making them a trusted choice for marine, RV, industrial, and off-grid applications where dependable power is non-negotiable.</p><p>Part of the Navico Group, MasterVolt benefits from decades of engineering excellence and a deep understanding of harsh operating environments. The brand's philosophy centers on providing integrated electrical systems that work seamlessly together, from power generation and storage to conversion and intelligent monitoring. With offices and partners in more than 80 countries, MasterVolt delivers global support backed by local expertise, ensuring customers have access to technical assistance wherever their adventures or operations take them.</p><h3>Engineered for Performance in Extreme Conditions</h3><p>What distinguishes MasterVolt from competitors is their systems-focused approach to electrical power. Rather than selling isolated components, MasterVolt designs products that communicate through their proprietary MasterBus platform, enabling comprehensive system monitoring and control. This integration is particularly valuable in complex installations where multiple power sources, battery banks, and loads must work in harmony.</p><p>The brand's product lineup addresses every aspect of autonomous power management. Their advanced <a href="/11274-mastervolt-battery-chargers-200141">battery chargers</a> utilize sophisticated multi-stage charging algorithms optimized for various battery chemistries, from traditional AGM to cutting-edge lithium-ion technologies. These chargers are engineered to maximize battery life while minimizing charging time—a critical consideration for users who depend on limited generator runtime or solar input.</p><p>Equally important to any robust electrical system are <a href="/11274-mastervolt-battery-isolators-voltage-sensitive-relays-200144">battery isolators and voltage sensitive relays</a>, which intelligently manage current flow between multiple battery banks. MasterVolt's approach to battery isolation ensures that essential loads always have priority access to power while auxiliary batteries charge efficiently when surplus capacity is available. This intelligent power distribution prevents the all-too-common scenario of a depleted starting battery.</p><h3>Trusted in the World's Most Demanding Environments</h3><p>MasterVolt specializes in managing, monitoring, converting and storing power for marine, mobile and industrial applications, environments where equipment faces constant vibration, temperature extremes, moisture exposure, and the consequences of power system failure can be severe. Their products are built to withstand these challenges while maintaining precise voltage regulation and clean power output that protects sensitive electronics.</p><p>Whether powering a blue-water cruising yacht, equipping an overland expedition vehicle, or providing backup power for critical infrastructure, MasterVolt delivers the reliability and performance that professionals demand. Their commitment to innovation ensures that every product represents the latest advances in power electronics, energy efficiency, and user-friendly operation.</p>

Part Number

62000900
08/03/2036 9:27 AM
Sale Price

$527.78

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Mastervolt 62000900 AGM 12/90 is a Group 31, 12-volt, 90Ah Absorbed Glass Mat (AGM) sealed marine battery engineered for both starting and house/service applications. In AGM batteries, the electrolyte is absorbed into fiberglass mat separators, eliminating free liquid acid—making this battery completely maintenance-free with no gas emissions under normal use and no risk of acid spills or leaks.

Thanks to its construction, this battery delivers rapid, high-current discharge ideal for engine starting, bow thrusters, windlasses, and winches. During a starting event, the AGM 12/90 provides the same initial power surge as a 180Ah flooded lead-acid battery—at roughly half the capacity rating—making it a highly efficient upgrade from conventional wet-cell batteries. Its low 3% monthly self-discharge rate means it holds a strong charge during winter storage and off-season lay-up.

Key Features:

  • Dual-Purpose Design: Serves as both a starter battery (high-current bursts) and a service/house battery (cyclical use for lighting, electronics, and instrumentation)
  • AGM Technology: Fully sealed, spill-proof, and valve-regulated—can be installed in virtually any orientation (except inverted) including hard-to-reach spaces
  • Superior Power Density: Delivers the same starting surge as a 180Ah flooded lead-acid battery
  • Glass-Fibre Plate Technology: Ensures low internal resistance for efficient charge acceptance and discharge performance
  • Thicker Plates: Extended service life compared to standard AGM designs
  • Flexible Terminal System: Removable M8 battery poles are compatible with all standard battery terminal types, simplifying installation without additional wiring
  • Maintenance-Free: No water additions, no venting requirements, no terminal corrosion from acid fumes
  • Winter Storage Ready: Extremely low self-discharge rate keeps the battery in first-rate condition after extended storage
  • Two-Year Warranty

Specifications:

  • Nominal Voltage: 12V DC
  • Nominal Capacity (C20): 90Ah
  • Maximum Charge Current: 25.5A
  • CCA (DIN): 360A
  • CCA (SAE): 570A
  • Battery Group: 31
  • Terminals: M8 / A-type
  • Dimensions (L x W x H, incl. handles): 13.0" x 6.8" x 8.7" (330 x 173 x 220 mm)
  • Weight: 61.7 lbs (28 kg)

The Mastervolt AGM 12/90 is the ideal drop-in replacement for flooded lead-acid Group 31 batteries in marine, RV, and off-grid power systems where reliability, safety, and performance are paramount.

Products specifications

Battery Type

AGM

Dimensions

9 1/4" Width x 6 5/8" Height x 13 1/8" Length

Group Size

Group 31

Type

Tapered Stud

Voltage

12 Volts DC

Amperage Hours

90

Best Use

Dual Purpose

Cold Cranking Amps

850 CCA

Marine Cranking Amps

850 MCA

Reserve Minutes

179

Warranty Details

Two Years

The product quality is good, and delivery is fast.

I arrive my order on time and very good quality in the parts, thank you.

great delivery time, fair price

Very quick delivery

arrived earlier than expected

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy