12V 51Ah Deep Cycle GEL Battery (DCG51-12)

🔋 FULLRIVER DCG51-12 DEEP CYCLE GEL BATTERY

12V 51Ah 22NF Deep Cycle Gel Battery – M6 Terminals, 67-Minute Reserve Capacity & Long Cycle Life

⚡ Reliable deep cycle power with sealed Gel technology, strong reserve capacity and maintenance-free operation.

The Fullriver DCG51-12 is a premium 12V 51Ah Deep Cycle Gel battery engineered for applications requiring dependable repeated discharge and recharge, consistent runtime and long service life.

Part of Fullriver’s DCG Series, the DCG51-12 combines 99.994% pure virgin lead plates, heavy-duty over-the-partition welds and Fullriver’s proprietary thixotropic gel electrolyte formulation to support reliable cycling performance, vibration resistance and durability.

With 51Ah capacity, practical 22NF sizing, sealed maintenance-free construction and a 67-minute reserve capacity at 25A, it is a strong choice for compatible solar, mobility, caravan, marine, backup, standby and commercial deep cycle applications.

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⚡ KEY FEATURES

🔋 12V Deep Cycle Gel Performance
Designed for true deep-cycle applications requiring repeated discharge and recharge operation.

⚡ 51Ah Capacity at 20HR Rate
Provides dependable stored energy for compatible 12V equipment, auxiliary systems and battery banks.

🧪 Advanced Gel Electrolyte Technology
Fullriver’s proprietary thixotropic gel formulation helps minimise electrolyte stratification and supports dependable cycling performance.

⏳ Approximately 1300 Cycles at 50% DOD
Engineered for extended service life when correctly charged and operated within suitable conditions.

💪 99.994% Pure Virgin Lead Plates
High-purity lead plate construction supports strength, durability and reliable repeated cycling.

🛡️ Strong Shock & Vibration Resistance
Heavy-duty over-the-partition welds help improve internal strength for demanding mobile and equipment applications.

⏱️ 67-Minute Reserve Capacity
Rated for approximately 67 minutes at a 25A load.

🔒 Sealed Recombinant Gel Construction
Provides maintenance-free operation and reduced off-gassing compared with conventional flooded batteries.

🔄 Flexible Installation
Can be installed in multiple compatible orientations, except upside down.

🌡️ Excellent Slow-Discharge Performance
Gel chemistry is well suited to applications involving sustained, lower-rate energy discharge.

📦 Practical 22NF Group Size
Provides substantial deep cycle capacity in a widely used battery format for compatible equipment installations.

🧯 Flame-Resistant ABS Case
Durable ABS plastic housing with a UL94-HB flame-resistance rating.

🔌 M6 Terminal Connections
Provides secure electrical connections for compatible deep cycle installations.

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🔋 BUILT FOR TRUE DEEP CYCLE USE

The Fullriver DCG51-12 is specifically designed for applications where the battery is regularly discharged and recharged during normal use.

Its Gel construction is suited to systems where dependable stored energy, sustained discharge performance and long cycle life are more important than high-current engine cranking.

This makes the DCG51-12 a strong option for compatible renewable energy systems, mobility equipment, auxiliary power installations, backup systems and commercial equipment.

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🧪 ADVANCED THIXOTROPIC GEL ELECTROLYTE

The DCG51-12 uses Fullriver’s proprietary gel electrolyte formulation rather than a conventional free-flowing liquid electrolyte.

This thixotropic Gel technology helps minimise electrolyte stratification and supports stable performance throughout repeated cycling.

Gel chemistry is particularly well suited to many slow-discharge applications where energy is delivered consistently over an extended period.

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💪 HEAVY-DUTY PURE LEAD CONSTRUCTION

The DCG51-12 uses 99.994% pure virgin lead plates combined with robust internal construction.

Thick plate design and heavy-duty over-the-partition welds help improve structural integrity and resistance to shock and vibration.

This construction supports dependable cycling performance in demanding mobility, commercial, marine and auxiliary power applications.

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⏳ DESIGNED FOR LONG CYCLE LIFE

The Fullriver DCG Series is engineered to provide extended service life in suitable deep cycle applications.

The supplied performance information indicates approximately 1300 cycles at 50% depth of discharge when the battery is correctly charged and operated under suitable conditions.

Actual battery service life will vary depending on depth of discharge, charging method, operating temperature, load profile and overall system conditions.

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🔒 SEALED & MAINTENANCE-FREE

The DCG51-12 uses sealed recombinant Gel construction, eliminating the need for routine watering or electrolyte top-ups.

This provides cleaner and lower-maintenance operation than a conventional flooded lead-acid battery.

Its sealed design also helps reduce off-gassing during normal operation, although installations should still comply with applicable ventilation and equipment requirements.

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🔄 FLEXIBLE INSTALLATION OPTIONS

The sealed Gel construction allows the DCG51-12 to be installed in multiple compatible orientations.

The battery should not be installed upside down.

Always ensure the battery is securely restrained and installed according to the requirements of the equipment, vehicle or battery enclosure.

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⏱️ STRONG RESERVE CAPACITY

The DCG51-12 provides useful reserve-energy performance across different load levels.

• Reserve capacity at 25A: 67 minutes
• Reserve capacity at 75A: 13 minutes

These ratings provide an additional indication of the battery’s stored-energy capability alongside its amp-hour capacity.

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📊 MULTIPLE CAPACITY RATINGS

The DCG51-12 provides different capacity figures depending on the discharge rate.

• Capacity at 1HR rate: 31.0Ah
• Capacity at 5HR rate: 43.0Ah
• Capacity at 20HR rate: 51Ah
• Capacity at 100HR rate: 58Ah

These ratings provide useful guidance for expected battery performance across different load and discharge conditions.

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⚡ INTERNAL RESISTANCE

The DCG51-12 has a specified internal resistance of approximately 9.40mΩ.

This supports dependable energy transfer across compatible deep cycle and auxiliary power applications.

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🔧 SUITABLE APPLICATIONS

• Mobility equipment
• Electric mobility applications
• Solar and renewable energy systems
• Caravan and RV auxiliary power
• Marine auxiliary systems
• Backup and standby power systems
• Floor cleaning machines
• Deep cycle battery banks
• Commercial equipment
• Personal deep-cycle applications
• Compatible 12V auxiliary power systems

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📐 PRODUCT SPECIFICATIONS

Brand: Fullriver

Model: DCG51-12

Series: DCG Series

Battery type: Deep Cycle Gel

Nominal voltage: 12V

Group size: 22NF

Capacity at 1HR rate: 31.0Ah

Capacity at 5HR rate: 43.0Ah

Capacity at 20HR rate: 51Ah

Capacity at 100HR rate: 58Ah

Reserve capacity at 25A: 67 minutes

Reserve capacity at 75A: 13 minutes

Internal resistance: 9.40mΩ

Lead purity: 99.994% pure virgin lead

Electrolyte type: Thixotropic Gel

Case material: ABS plastic

Flame-resistance rating: UL94-HB

Terminal type: M6

Recommended terminal torque: 40–55 in-lbs

Weight: Approximately 17.1kg

Cycle performance: Approximately 1300 cycles at 50% depth of discharge under suitable operating conditions

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📏 DIMENSIONS

Length: 229mm

Width: 138mm

Case height: 208mm

Height including terminals: 212mm

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📦 WHAT’S INCLUDED?

• 1 × Fullriver DCG51-12 12V 51Ah Deep Cycle Gel Battery

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⚠️ FITMENT & COMPATIBILITY INFORMATION

Please confirm the electrical, physical and charging requirements of your equipment before purchasing.

Check the required:

• Battery voltage – 12V
• Battery chemistry – Gel
• Battery capacity
• Group size – 22NF
• Physical dimensions
• Terminal type – M6
• Terminal orientation and polarity
• Terminal torque requirements
• Charging profile
• Available installation space
• Deep cycle application requirements

⚠️ IMPORTANT: Gel batteries require a compatible charging profile. Do not assume a charger configured for AGM, flooded lead-acid or another battery chemistry is automatically suitable. Confirm charger compatibility before installation.

⚠️ IMPORTANT: Do not install the battery upside down. Always securely restrain the battery and follow the equipment manufacturer’s installation requirements.

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❓ FREQUENTLY ASKED QUESTIONS

What type of battery is the Fullriver DCG51-12?

The DCG51-12 is a sealed 12V Deep Cycle Gel battery from Fullriver’s DCG Series.

What is the battery capacity?

The battery is rated at 51Ah at the 20-hour discharge rate.

What are the other capacity ratings?

The supplied specifications list 31.0Ah at the 1-hour rate, 43.0Ah at the 5-hour rate, 51Ah at the 20-hour rate and 58Ah at the 100-hour rate.

What group size is the DCG51-12?

The DCG51-12 uses a 22NF-size battery case.

Is the DCG51-12 a true deep cycle battery?

Yes. It is designed specifically for repeated deep cycle discharge and recharge applications.

What is the difference between Gel and AGM?

Both are sealed lead-acid battery technologies, but they retain electrolyte differently. AGM batteries absorb electrolyte into glass mat separators, while Gel batteries use a gelled electrolyte. Gel batteries require a compatible charging profile and are particularly well suited to many sustained-discharge and repeated cycling applications.

What is the reserve capacity?

The DCG51-12 provides approximately 67 minutes of reserve capacity at a 25A load and approximately 13 minutes at a 75A load.

How many cycles can the DCG51-12 provide?

The supplied performance information indicates approximately 1300 cycles at 50% depth of discharge under suitable charging and operating conditions. Actual service life will vary with use.

Does the DCG51-12 require maintenance?

No routine watering or electrolyte top-ups are required because the battery uses sealed Gel construction.

Can the battery be mounted on its side?

The sealed design allows installation in multiple compatible orientations, but the battery should not be installed upside down. Always follow the equipment and battery enclosure requirements.

Is the DCG51-12 suitable for solar applications?

Yes. It may be suitable for compatible solar and renewable-energy systems designed around a 12V Gel battery with an appropriate charging profile.

Can it be used in a caravan or RV?

Yes, where the electrical system requires a compatible 12V deep cycle Gel battery with matching capacity, dimensions, terminals and charging requirements.

Is the DCG51-12 suitable for marine auxiliary power?

It may be suitable for compatible marine auxiliary applications where its voltage, capacity, dimensions, terminal configuration and charging requirements match the system.

Can the DCG51-12 be used for mobility equipment?

Yes, where the equipment requires a compatible 12V 51Ah 22NF Gel battery with M6 terminals and matching physical dimensions.

Can the DCG51-12 be used for backup or standby power?

Yes. It may be suitable for compatible backup and standby systems requiring a 12V Gel battery with the correct capacity, dimensions and charging profile.

Can the DCG51-12 be used in a battery bank?

Yes. Multiple batteries may be used in a correctly designed battery bank where system voltage, charger configuration, cable sizing and battery matching are appropriate.

Can the DCG51-12 be used for engine starting?

The DCG51-12 is designed as a deep cycle Gel battery. No dedicated CCA rating has been supplied, so it should not be selected as an engine-starting battery unless the equipment manufacturer specifically confirms suitability.

What terminals does the battery use?

The DCG51-12 uses M6 terminals with a recommended tightening torque of 40–55 in-lbs.

What are the battery dimensions?

The battery measures approximately 229mm long, 138mm wide and 208mm high at the case, or 212mm high including the terminals.

How much does the DCG51-12 weigh?

The DCG51-12 weighs approximately 17.1kg.

What is the internal resistance?

The supplied internal resistance specification is approximately 9.40mΩ.

Is the battery case flame resistant?

Yes. The ABS plastic case has a supplied UL94-HB flame-resistance rating.

Can I use a standard AGM charger with this battery?

Only if the charger manufacturer confirms that its charging profile is suitable for Gel batteries. Gel and AGM batteries can require different charging settings, so compatibility should always be confirmed before use.

How do I know if the DCG51-12 will replace my existing battery?

Compare the required voltage, Gel battery chemistry, 22NF case size, capacity, physical dimensions, M6 terminal configuration and charging profile with your existing battery and equipment specifications before purchase.

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🔋 LONG-LIFE 22NF DEEP CYCLE GEL POWER

Choose the Fullriver DCG51-12 when you need dependable repeated cycling, strong reserve capacity and maintenance-free Gel battery technology in a practical 22NF package.

With 51Ah capacity, approximately 1300 cycles at 50% depth of discharge, 67-minute reserve capacity, 99.994% pure virgin lead construction and sealed Gel electrolyte technology, the DCG51-12 is built for compatible solar, mobility, caravan, marine, backup and commercial equipment applications.

Power your 12V system with dependable Fullriver Deep Cycle Gel performance.