Giantz AGM Deep Cycle Battery 12V 140Ah Box Portable Solar Caravan Camping

Giantz 12V 140Ah AGM deep-cycle battery with approximately 1,680Wh of nominal energy for compatible caravan, camper, marine, solar and backup-power systems. The sealed AGM construction is maintenance-free in the sense that no electrolyte top-up is required, while regular correct charging is still essential.

This is a deep-cycle house battery, not an engine-starting battery. Match it to the complete charger, solar controller, inverter, cable and fuse system before ordering.

Key specifications

• Nominal voltage: 12V
• Rated capacity: 140Ah at the 10-hour rate
• Nominal energy: approximately 1,680Wh
• AGM deep-cycle construction
• Supplier-listed maximum cycle life: up to 1,400 cycles at 30% depth of discharge
• Maximum charge current: 25A
• Supplier-listed maximum discharge current: 1,200A for 5 seconds
• Float charge voltage: 13.5V to 13.8V
• Equalise charge voltage: 13.8V to 14.1V
• Cycle charge voltage: 14.4V to 15.0V
• Self-discharge: approximately 3% per month at 25°C
• Discharge temperature: -15°C to 50°C
• Charge temperature: -20°C to 50°C
• Storage temperature: -20°C to 50°C
• Internal resistance: approximately 5.0mΩ
• Terminals: bolt-down
• Container: ABS
• Dimensions: 330 × 171 × 216mm
• Approximate weight: 29.5kg

Caravan and off-grid suitability

The 140Ah capacity suits appropriately designed 12V auxiliary systems where an AGM battery's familiar charging profile and sealed construction are preferred. Actual run time depends on appliance load, inverter losses, cable voltage drop, charging conditions, battery age and the depth of discharge used.

Compare more AGM deep-cycle batteries or browse the wider deep-cycle battery range.

Charging and system compatibility

Use an AGM-compatible charger or MPPT solar charge controller configured within the listed voltage and current limits. The 1,200A figure is a five-second supplier rating; it is not a continuous inverter-sizing specification.

Install correctly rated cabling, fusing and isolation. Allow ventilation and keep the battery secured against movement, particularly in caravan, 4WD and marine installations.

Storage and maintenance

Charge the battery on receipt. Recharge after use and at least every three months during extended storage, checking the current Giantz manual for the applicable interval. Avoid leaving an AGM battery deeply discharged because extended under-charge can cause permanent damage and shorten service life.

Frequently asked questions

How much energy does a 140Ah AGM battery store?

The nominal calculation is approximately 1,680Wh (12V × 140Ah). Usable energy is lower after system losses and depends strongly on discharge rate and depth of discharge.

Can it replace a lithium battery?

Not as a direct substitution without checking the system. AGM and LiFePO4 batteries have different charging profiles, usable capacity, current limits, weight and discharge behaviour.

Is a battery box included?

The supplied package list includes one Giantz deep-cycle battery and one user manual. No separate battery box is listed.

What's included

• 1 × Giantz 12V 140Ah AGM deep-cycle battery
• 1 × User manual