FGG250-12 sealed maintenance free gel cell battery 12v 250ah

Gel Battery 12V 250AH | Dimension: 520x268x220x224mm

SKU: FGG250-12 Category:

GRANKIA FGG250-12 sealed maintenance free gel cell battery 12v 250ah has no liquid inside, the electrolytes is in gel form and stand solid between positive and negative plate inside battery.

This sealed maintenance free gel cell battery 12v 250ah generally maintenance-free and vibration resistant. It also has a wide operating temperature range and a longer cycle life than AGM batteries.

GRANKIA gel battery grid technology is a lead antimony alloy grid mixture formulated specifically for use with T2 Technology. Thick grids reinforce the strength of the frame and reduce corrosion. The overall grid configuration is optimized to enhance current flow through the grid network providing exceptional battery performance, reducing downtime and lowering maintenance costs.

FGG250-12 sealed maintenance free gel cell battery 12v 250ah

FGG250-12 sealed maintenance free gel cell battery 12v 250ah

Gel Cell Battery 12V 250AH Features

  • Maintenance free, no need to add water
  • Safe operation since no liquid inside
  • Can be installed sideways ( upside-down is not recommended )
  • Long cycle life
  • Low self-discharge makes shelf life longer.
  • Long standby life due to its ability to keep electrolyte inside and steady
  • Performance stays high and stable until the end of life
  • Tolerance to abuse and heat during operation, good for extreme weather

Deep Cycle Battery Applications

  • Uninterrupted power supply(UPS)
  • Automotive and traction applications
  • Lighting equipment, fire alarms and security systems
  • Communication and telecom system
  • Solar energy system
  • High current drain applications
  • Fire alarms and security systems
  • Portable VTR/TV, tape recorders, radios, etc.
  • Various power toys and recreational equipment
  • Emergency power supplies in power generation plants and substations
  • Golf Cart

AGM Gel Battery Details

sealed lead acid battery 12v copper terminalReliable and high performance lead acid battery

AGM lead acid battery in series or in parallel connection

Battery Storage Characteristics

Lead Acid Battery Discharge Characteristics Lead Acid Battery Charging Characteristics
Lead acid battery effect of temperature on capacity Lead acid battery self discharge characteristics
Lead acid battery relationship for open circuit voltage and residual capacity Lead acid battery the relationship for charging voltage and temperature
Lead acid battery floating life on temperature Lead acid battery cycle life on DOD

Solar Gel Battery FAQ

  1. Is gel battery good for solar?

    Solar gel batteries can be an excellent option for certain solar energy system setups that don’t require powering an entire residence or building. These batteries operate much like other lead-acid batteries but come with a few extra advantages. Deep-cycle gel batteries release less hydrogen gas during discharges.

  2. How do I know when my gel battery is fully charged?

    The sealed AGM and gel cell battery voltage (fully charged) will be slightly higher in the 12.8 to 12.9 range. If you have voltage readings in the 10.5 volt range on a charged battery, that typically indicates a shorted cell. If you have a maintenance-free wet cell, the only ways to test are volt meter and load test.

  3. Which is better lithium or gel battery?

    GEL batteries are the best for testing or less expensive solar projects. Lithium batteries are good for long-time installation and help avoid frequent substitution.


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Nominal Voltage 12V(6 cells per unit)
Design Floating Life @25℃ 10 Years
Nominal Capacity @25℃(10 hour [email protected],10.80V) 250Ah
Capacity @25℃ 20 hour rate (13.88A,10.5V) 277.6Ah
 5 hour rate (45.7A,10.5V) 228.5Ah
1 hour rate (184.8A,9.6V) 184.8Ah
Internal Resistance Full Charged Battery@25℃ ≤2.0mΩ
Ambient Temperature Discharge -20℃~50℃
Charge -20℃~50℃
Storage -20℃~50℃
Max. Discharge Current@25℃ 2000A(5s)
Capacity affected by Temperature

(10 hr Capacity )

40℃ 102%
25℃ 100%
0℃ 90%
-15℃ 70%
Self-Discharge@25℃ per Month 3%
Charge (Constant Voltage) @25℃ Standby Use Initial Charging Current Less than 50A

Voltage 13.6-13.8V

Cycle Use Initial Charging Current Less than 50A

Voltage 14.4-14.9V


Discharge Constant Current per Cell (Amperes at 25°C)

F.V/Time 15min 30min 45min 1h 2h 3h 5h 6h 8h 10h 20h
1.60V 422.1 262.6 188.4 184.8 101.4 74.1 47.7 40.5 29.1 26.00 14.43
1.65V 404.5 255.6 183.4 179.9 99.5 72.8 47.0 39.8 28.8 25.75 14.29
1.70V 386.9 248.6 178.3 174.9 97.7 71.4 46.4 39.0 28.6 25.50 14.15
1.75V 369.3 241.5 173.3 170.0 95.3 69.7 45.7 38.3 28.3 25.25 14.01
1.80V 351.8 234.5 168.3 165.0 93.0 68.0 45.0 37.5 28.0 25.00 13.88

Discharge Constant Powerper Cell (Watts at 25°C)

F.V/Time 15min 30min 45min 1h 2h 3h 5h 6h 8h 10h 20h
1.60V 787.2 489.8 351.4 344.7 189.1 138.2 89.0 78.3 54.3 48.5 26.9
1.65V 754.4 476.7 342.0 355.4 185.6 135.7 87.7 77.0 53.8 48.0 26.7
1.70V 721.6 463.6 332.6 326.2 182.1 133.2 86.4 76.0 53.3 47.6 26.4
1.75V 688.8 450.5 323.2 317.0 177.8 130.0 85.2 74.8 52.7 47.1 26.1
1.80V 656.0 437.3 313.8 307.7 173.4 126.8 83.9 73.5 52.2 46.6 25.9