Ultracell UCG55-12 GEL batteries - 55Ah 12V Gel
The Ultracell UCG55-12 GEL battery is a 12 V, 55 Ah battery designed for energy storage in small solar systems and portable applications. Its gel technology uses a gelled electrolyte in a sealed battery, with a deep cycle rating of up to 1,200 cycles at 50% discharge. It measures 229 × 138 × 209 mm and weighs 17 kg.
- Specifications: 12 V, 55 Ah, 229 × 138 × 209 mm, 17 kg, internal resistance 0.006 mΩ.
- Cells: Gel technology (gelled electrolyte) and sealed battery.
- BMS + communication: Not applicable, as this is a gel battery (no BMS or communication indicated).
- Compatibility + scalability: Suitable for small photovoltaic systems and mobile applications. Deep cycling rated for up to 1,200 cycles at 50% discharge.
Compatible avec :

GEL 55Ah battery: Portable, durable energy solution
55Ah Gel Batteries
Gel batteries are sealed batteries: no maintenance, no need to add distilled water. Greater safety than open lead batteries.
A Gel battery can withstand 100% discharge and recover its rated capacity if the discharged holding time is short. This series has a longer discharge time than other batteries. Its special plate design increases battery life, particularly in warmer temperatures. A separator within the battery enhances its performance. It also has a longer shelf life.
- Nominal voltage: 12V
- Capacity: 55Ah
- Dimensions :
- L 229 x W 138 x H 209 mm
- Weight: 17 Kg
Life cycle versus depth of discharge

Comparative table of price per useful kWh over battery life at a glance!

There are many different storage technologies: Gel or AGM batteries, lithium batteries, OPzS and OPsV. It's not easy to choose the right technology for your needs. Each technology has its own characteristics (size, power, cost, number of cycles and service life, etc.). With this table, you can quickly compare the price per useful kWh over the lifetime of the batteries.
C10 = 10-hour charge/discharge test.
C24 = examination of a charge or discharge in 24 hours.
Click here to see our comparison table.
Data sheet
- Voltage
- 12V
- Technology
- Gel
- Battery capacity
- 55Ah
- Rated capacity
- 1 hour, 1.60V/cell, 25°C - 33.0 AH/33.0A
10 hours, 1.80V/cell, 25°C - 52.25 AH/5.225A
20 hours, 1.80V/cell, 25°C - 61.0 AH/2.8A
5 hours, 1.75V/cell, 25°C - 46.75 AH/9.35A
61.0AH - Maximum discharge current
- 16.5A
- Internal resistance
- 0.006mΩ
- Standby use
- 13.6V ~ 13.8V Temperature coefficient -mV/°C Coefficient -mV/°C
- Self-discharge
- Ultracell batteries can be stored for up to 6 months at 25°C (°77F), after which a new charge is required. For higher temperatures, the time interval will be shorter.
- Operating temperature range
- Charge : 0 ~ 40°C (5 ~ 104°F)
Discharge: -15 ~ 50°C (5 ~ 122°F)
Stockage : -15 ~ 40°C (5 ~ 104°F) - Weight
- 17 kg
- Nominal operating temperature range
- 25 ± 3°C (77 ± 5°F)
- Cycle Use
- 14.4V ~ 15.0V Temperature coefficient -mV/°C Coefficient -mV/°C
- Capacity affected by temperature
- 0°C (32°F) 86%
25°C (77°F) 100%
40°C (104°F) 103%
Specific References
- UPC
- 712971128927
- EAN13
- 0712971128927
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Ultracell UCG55-12 GEL batteries - 55Ah 12V Gel — AGM / GEL battery
Ultracell UCG55-12 GEL batteries - 55Ah 12V Gel by Ultracell is available in our AGM / GEL battery catalog. Technical specifications: voltage: 12V, technology: Gel, battery capacity: 55Ah, rated capacity: 1 hour, 1.60V/cell, 25°C - 33.0 AH/33.0A 10 hours, 1.80V/cell, 25°C - 52.25 AH/5.225A 20 hours, 1.80V/cell, 25°C - 61.0 AH/2.8A 5 hours, 1.75V/cell, 25°C - 46.75 AH/9.35A 61.0AH, maximum discharge current: 16.5A, internal resistance: 0.006mΩ, standby use: 13.6V ~ 13.8V Temperature coefficient -mV/°C Coefficient -mV/°C, self-discharge: Ultracell batteries can be stored for up to 6 months at 25°C (°77F), after which a new charge is required. For higher temperatures, the time interval will be shorter., operating temperature range: Charge : 0 ~ 40°C (5 ~ 104°F) Discharge: -15 ~ 50°C (5 ~ 122°F) Stockage : -15 ~ 40°C (5 ~ 104°F), weight: 17 kg, nominal operating temperature range: 25 ± 3°C (77 ± 5°F), cycle use: 14.4V ~ 15.0V Temperature coefficient -mV/°C Coefficient -mV/°C, capacity affected by temperature: 0°C (32°F) 86% 25°C (77°F) 100% 40°C (104°F) 103%. Product weight: 17.0 kg. Reference: 0736.