Trojan J305-AES 6V 279Ah AGM M8 Deep Cycle Battery Heavy-Duty Industrial 1,200 Cycles

Trojan Motive J305-AES 279Ah 6V AGM Deep Cycle Battery

Maximum Capacity. Zero Maintenance. Built for the Toughest Jobs.

The Trojan J305-AES delivers premium heavy-duty performance where it matters most—powering the equipment that keeps industrial and commercial operations running. This 6V 279Ah AGM deep-cycle battery features Advanced Energy Storage (AES) technology, engineered to outlast standard AGM batteries by up to three times while eliminating all maintenance requirements.

Industrial-Grade Power for Mission-Critical Applications

Designed for high-demand motive and stationary energy storage systems, the J305-AES excels in environments where downtime isn't an option and regular battery maintenance is impractical or impossible.

Ideal Applications

Industrial Floor Cleaning Equipment Powers commercial scrubbers, sweepers, and burnishers through extended runtimes and demanding daily cycling, delivering consistent performance shift after shift.

Aerial Work Platforms (AWP) The trusted choice for scissor lifts and boom lifts where reliability is critical for both safety and maximizing productive uptime.

Marine & RV Systems Robust house battery solution for off-grid power, trolling motors, and onboard electronics. Sealed design eliminates acid spill risks in living spaces.

Material Handling Equipment Provides dependable energy for electric pallet jacks and small forklifts in warehouse and distribution environments.

Renewable Energy Storage Perfect for off-grid solar arrays and residential backup systems where a "set-and-forget" maintenance-free solution is essential for reliable power.

Advanced Energy Storage Technology

Partial State of Charge (PSoC) Resilience Operates efficiently without requiring full recharge between uses—preventing the sulfation damage that destroys conventional lead-acid batteries. Ideal for opportunity charging and variable-use applications.

Triple the Cycle Life Validated to deliver up to 1,200 cycles at 100% depth of discharge—three times longer than standard AGM batteries, dramatically reducing total cost of ownership and replacement frequency.

Extreme Temperature Performance Engineered to maintain consistent performance in the harshest conditions, from -40°F to 160°F (-40°C to 71°C). Operates reliably where conventional batteries fail.

Maintenance-Free Operation Completely sealed VRLA design eliminates watering, acid checks, electrolyte monitoring, and corrosion concerns—reducing labor costs while ensuring peak performance.

Flexible Installation Non-spillable, sealed construction allows safe mounting in any position, including horizontal installation in tight or unconventional spaces.

High Capacity Design With 279Ah at the 20-hour rate, the J305-AES provides extended runtime and maximum energy storage in the BCI Group 902/J305 footprint.

Technical Specifications

• Voltage: 6V
• Capacity: 279Ah (20-hour rate)
• BCI Group Size: 902 / J305
• Technology: AGM with Advanced Energy Storage (AES)
• Cycle Life: Up to 1,200 cycles at 100% DOD
• Temperature Range: -40°F to 160°F (-40°C to 71°C)
• Design: Sealed, maintenance-free VRLA
• Terminal Type: M8 threaded insert
• Mounting: Non-spillable, any position installation
• Application: Deep cycle, motive power, energy storage

Common System Configurations

Since this is a 6V battery, multiple units are connected in series to achieve required system voltage:

Voltage Requirements:

• 12V System: 2 batteries in series
• 24V System: 4 batteries in series
• 36V System: 6 batteries in series
• 48V System: 8 batteries in series

Capacity Expansion: Add parallel strings to increase amp-hour capacity while maintaining voltage (e.g., 16 batteries = 48V 558Ah system).

Why Choose the J305-AES?

When You Need:

• ✅ Maximum capacity in the J305 form factor (279Ah)
• ✅ Zero-maintenance reliability for remote or difficult-to-access installations
• ✅ PSoC operation capability (opportunity charging, variable loads)
• ✅ Extreme temperature resilience (-40°F to 160°F)
• ✅ Extended service life to minimize replacement costs
• ✅ Sealed, safe operation in enclosed spaces
• ✅ Flexible mounting options including horizontal installation
• ✅ Premium performance for critical applications

The Trojan Difference

For over 95 years, Trojan Battery has set the global standard for deep-cycle battery performance and reliability. The J305-AES combines time-tested engineering with cutting-edge AES technology to deliver unmatched performance in the most demanding applications.

Perfect for operations where:

• Equipment downtime has high operational costs
• Maintenance access is limited or expensive
• Extreme environmental conditions are present
• Long-term reliability justifies premium investment
• Safety requires sealed battery technology
• Maximum capacity and cycle life are essential

Advanced Energy Storage Advantage

Traditional AGM batteries fail prematurely when subjected to partial state of charge cycling—the reality of most industrial equipment and renewable energy applications. Trojan's Advanced Energy Storage technology specifically addresses this weakness, allowing the J305-AES to thrive under real-world conditions that destroy conventional batteries.

Group 902/J305 Applications

The J305 footprint is specifically designed for:

• Heavy-duty floor cleaning equipment
• Large aerial work platforms
• High-capacity solar battery banks
• Commercial material handling equipment
• Marine house banks requiring maximum capacity
• RV systems with high energy demands

Expert System Design Support

Need help sizing your battery bank? Our technical team can assist with:

• Series/parallel configuration for your voltage and capacity requirements
• Compatible charging system recommendations
• Proper wire sizing and connection specifications
• System optimization for maximum performance and longevity

Contact our battery experts for personalized design assistance.

Specifications at a Glance

Size

11.66" × 6.94" × 14.09"

Weight

101 lb