Giantz AGM Deep Cycle Battery 12V 75Ah x2 Box Portable Solar Caravan Camping

Two Giantz 12V 75Ah AGM deep-cycle batteries providing approximately 1,800Wh of combined nominal energy. The matched pair suits properly designed caravan, camper, marine, solar and dual-battery installations where sealed AGM storage is preferred.

Each battery is rated at 75Ah at the 10-hour rate. Depending on the equipment and permitted wiring arrangement, two identical batteries may form a 12V 150Ah parallel bank or a 24V 75Ah series bank; both configurations retain approximately 1,800Wh of nominal energy. Confirm the current Giantz instructions and system design before connection.

What's included

• 2 × Giantz 12V 75Ah AGM deep-cycle batteries
• 2 × User instructions

No separate portable battery box is listed as included. The two batteries are supplied as separate packages.

Specifications per battery

• Nominal voltage: 12V
• Rated capacity: 75Ah at the 10-hour rate
• Nominal energy: approximately 900Wh
• Supplier-listed maximum cycle life: up to 1,400 cycles at 30% depth of discharge
• Maximum charge current: 13.8A
• Supplier-listed maximum discharge current: 660A for 5 seconds
• Float charge voltage: 13.5V to 13.8V
• Supplier-listed equalise 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 7.6mΩ
• Terminals: bolt-down
• Container: ABS
• Dimensions per battery: 229 × 138 × 208mm
• Approximate weight per battery: 15.5kg
• Installation orientation: upright only, according to the supplied listing
• Warranty: 2 years

Dual-battery installation guidance

Use only matching batteries of the same model, age, capacity and state of charge. A parallel bank requires balanced cable paths so both batteries share current appropriately. A series bank requires equipment designed for the resulting 24V nominal system.

Do not mix one new battery with an older or differently rated battery. The cabling, fusing, isolation, mounting and charging system should be designed and installed by a suitably competent person.

Browse compatible dual-battery equipment, compare other AGM deep-cycle batteries, or view the wider deep-cycle battery range.

Charging and solar compatibility

Use an AGM-compatible charger. For vehicle charging, confirm the selected DC-DC battery charger supports AGM chemistry and the intended bank voltage. For solar charging, use an appropriately sized MPPT solar controller configured within the supplier-listed limits.

The 660A figure applies for five seconds per battery and is not a continuous inverter rating. Size inverters, cables and fuses from verified continuous requirements and account for start-up surge, voltage drop and simultaneous DC loads.

Storage and battery care

Charge both batteries on receipt and recharge promptly after use. The supplier recommends charging at least every three months during extended storage. Avoid prolonged deep discharge, which can permanently reduce AGM battery capacity and service life.

Frequently asked questions

How much combined energy does the pair store?

The combined nominal energy is approximately 1,800Wh. Actual usable energy is lower after system losses and depends on discharge rate, temperature, battery condition and the reserve maintained for service life.

Can I connect the batteries in parallel?

Parallel connection may provide a 12V 150Ah nominal bank when the current product instructions and complete system permit it. The batteries must be closely matched and connected with balanced, correctly protected cabling.

Can I connect the batteries in series?

Series connection may provide a 24V 75Ah nominal bank only when every connected charger, controller, inverter and DC appliance is compatible with a 24V system.

Are these engine-starting batteries?

No. They are presented as AGM deep-cycle batteries for auxiliary and house-power applications.