MK Battery DEKA 8GU1H 36Ah 12V Gel Deep-Cycle Battery (Pallet of 111)

The MK Battery Deka 8GU1H is a 12V 36Ah valve-regulated, gelled-electrolyte deep-cycle battery built on sulfuric acid thixotropic gel technology with a lead-calcium plate alloy. Rated at 36Ah (C/100 rate), it is engineered for applications that demand repeated deep discharges — including solar energy storage, golf carts, RV and marine house loads, and home backup systems — 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 / 36Ah (C/100 rate) / 31.6Ah (C/20 rate) / 26.8Ah (C/5 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: 8.41 × 5.18 × 7.22 in. (214 × 132 × 183 mm) / 23.5 lbs. (11 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 boats, RVs, and enclosed solar enclosures. The 8GU1H'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. With a recommended depth of discharge between 50% and 80%, it sustains more usable cycles over its service life compared to conventional sealed batteries routinely discharged below that threshold.

Key Applications

• Solar energy storage: Serves as the house battery in off-grid cabin, van build, or residential solar backup systems paired with a 12V charge controller — particularly well suited for cold-climate installations where standard batteries lose capacity.
• Golf carts: A well-matched size for small single-cart auxiliary power or replacement service in low-speed electric vehicles requiring reliable deep-cycle capacity in varying temperatures.
• RV house loads: Powers lights, fans, and low-draw appliances in motorhomes and travel trailers without the acid-spill risk of flooded alternatives in confined compartments.
• Marine applications: Rated non-spillable by ICAO, IATA, and DOT — suitable for trolling motors, fish finders, and onboard electronics on small boats where sealed construction handles vibration, tilt, and moisture.
• Home 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.

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 storage compartments.
• Forged terminals and bushings: Provide a more secure connection and improved conductivity compared to standard cast post designs, reducing resistance and heat buildup at the terminal interface.

Charging and system compatibility

The 8GU1H is compatible with any 12V solar charge controller — PWM or MPPT — configured to a gel charge profile. Cycle charge voltage should be set to 13.8–14.6V; float voltage to 13.4–13.6V. 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 8GU1H 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 8GU1H?

The Deka 8GU1H brings gel electrolyte technology's superior deep-cycle performance and extreme-temperature resilience to compact 12V 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, and lead-calcium plate alloy make it one of the most capable 12V 36Ah gel deep-cycle batteries available for buyers who need reliable performance in demanding, real-world conditions across all climates and environments.

Dimensions

8.41 × 5.18 × 7.22 in (214 × 132 × 183 mm)

Weight

23.5 lbs (11 kg)