MK Battery DEKA 8G40-EI-DEKA 48Ah 12V Gel Deep-Cycle Battery (Pallet of 90)

The MK Battery Deka 8G40-EI-DEKA is a 12V 48Ah valve-regulated, gelled-electrolyte deep-cycle battery built on sulfuric acid thixotropic gel technology with a lead-calcium plate alloy. Rated at 48Ah (C/100 rate), it is engineered specifically for photovoltaic and renewable energy applications that demand repeated deep discharges — including solar energy storage, off-grid systems, remote monitoring, and wind generation — all in a sealed, non-spillable, position-flexible package rated for use in extreme temperatures down to -76°F (-60°C).

Key specifications

• Voltage / Capacity: 12V nominal / 48Ah (C/100 rate) / 40Ah (C/20 rate)
• Chemistry: Valve-regulated gelled electrolyte (Gel) — maintenance-free, non-spillable, no venting or watering required
• Operating temperature: -76°F to 140°F (-60°C to 60°C) — one of the widest operating ranges available in a sealed deep-cycle battery
• Dimensions / Weight: 7.76 × 6.62 × 6.88 in. (197 × 168 × 175 mm) / 31.5 lbs. (14 kg)
• Certifications: Rated non-spillable by ICAO, IATA, and DOT — approved for air, ground, and marine transport

No maintenance, no spills, extreme temperature resilience

Flooded lead-acid batteries require regular water top-offs, forced upright installation, and dedicated venting — drawbacks that make them impractical in solar enclosures, remote installations, and off-grid cabinets. The 8G40-EI-DEKA's thixotropic gel construction eliminates all three: the gelled electrolyte cannot spill regardless of orientation, the self-sealing VRLA vent manages internal pressure automatically, and the battery operates reliably across an extraordinary -76°F to 140°F temperature range that neither AGM nor standard gel batteries can match. Exclusive IPF® Technology optimizes power capacity, cell consistency, and long-term reliability across the battery's service life.

Key Applications

• Solar / photovoltaic energy storage: Purpose-built for off-grid and grid-tied solar systems — the "-EI" designation indicates this model is optimized for photovoltaic applications, particularly well suited for cold-climate installations where standard batteries lose capacity.
• Renewable energy systems: Ideal for wind generation, water pumping, and cathodic protection systems requiring reliable deep-cycle capacity with minimal maintenance intervention.
• Remote monitoring and communications: Powers remote telemetry, communications equipment, and refrigeration units in locations where regular maintenance is not practical.
• Residential backup and UPS: Provides standby power for inverter-based home battery backup systems and uninterruptible power supplies requiring a dependable 12V sealed deep-cycle gel battery.
• Aids to navigation and lighting: Rated non-spillable by ICAO, IATA, and DOT — suitable for marine navigation aids, buoys, and remote lighting systems where sealed construction handles vibration, tilt, and moisture.

Sealed gel design and mounting flexibility

• Position-flexible installation: The gelled electrolyte cannot leak or spill, allowing installation in virtually any orientation — giving installers freedom in tight or unconventional spaces where an upright flooded battery won't fit.
• VRLA self-sealing vent: The valve-regulated design automatically manages internal gas buildup, eliminating the need for external battery venting in enclosed cabinets or solar storage compartments.
• Forged terminals and bushings: Terminal type C (1/4"-20 threaded insert) provides a secure, corrosion-resistant connection and improved conductivity, reducing resistance and heat buildup at the terminal interface.

Charging and system compatibility

The 8G40-EI-DEKA is compatible with any 12V solar charge controller — PWM or MPPT — configured to a gel/photovoltaic charge profile. Bulk charge max current should not exceed 30% of the 20Hr rate; absorption charge at 2.35–2.40 vpc; float charge at 2.25 vpc ±0.01; equalize charge at 2.40–2.43 vpc. Multiple units can be wired in series to build 24V or 48V battery banks, or in parallel to increase total Ah capacity while remaining at 12V. Always use a charger that supports gel chemistry settings — do not use AGM-only or standard flooded profiles, as overcharging a gel battery will cause permanent capacity loss.

Made in the USA

The 8G40-EI-DEKA is manufactured by East Penn Manufacturing in the United States and distributed by MK Battery, ensuring high quality and consistent production standards.

Why choose the MK Battery Deka 8G40-EI-DEKA?

The Deka 8G40-EI-DEKA brings gel electrolyte technology's superior deep-cycle performance and extreme-temperature resilience to photovoltaic applications where flooded and standard AGM batteries fall short. Its extraordinary -76°F to 140°F operating range, non-spillable DOT/IATA/ICAO-rated construction, exclusive IPF® Technology, and lead-calcium plate alloy make it one of the most capable 12V 48Ah gel deep-cycle batteries available for solar and renewable energy buyers who need reliable performance in demanding, real-world conditions across all climates and environments.

Dimensions

7.76 × 6.62 × 6.88 in

Weight

31.5 lbs