12V 100Ah

Suitable for small to medium-power applications:

• • RV / Camper power supply

  • Small off-grid solar storage systems

  • UPS backup power

  • Small marine batteries

  • Mobile tools, LED lighting, electric actuators

12V 150Ah

Designed for longer runtime applications:

• • • Medium-size solar storage systems

    • Car refrigerators, 500–1000W inverters

    • Food trucks / mobile vending power supply

    • Emergency medical backup power

12V 200Ah

A commonly used high-capacity model:

• • • • RV main power system (can support air conditioner for short periods)

      • Home photovoltaic energy storage

      • Small server UPS systems

      • Fishing boats, yacht equipment

      • Telecom base-station backup power

12V 250Ah / 300Ah / 314Ah

Ultra-high capacity for long-duration power supply:

• • • • • Large off-grid solar energy storage

        • Industrial & commercial energy storage

        • Large yachts / fishing vessels

        • High-power inverters (2000W–5000W)

        • Outdoor construction power / mobile camps

        • Data centers, security systems with long backup requirements

12V 314Ah is an upgraded capacity preferred by some customers to replace 12V 300Ah, ideal for:

• • • • • Professional applications requiring longer cycle life and runtime

        • 48V systems using 4 units in series (4S) → 48V314Ah

      II. Internal Structure & Components

      A lead-acid-to-lithium upgraded battery typically contains the following components:

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      1. LiFePO₄ Cells (Lithium Iron Phosphate)

      Key advantages:

      • • • Extremely high safety (no fire, no explosion)

          • 3,000–6,000+ cycle life

          • Higher energy density; 1/3–1/5 the weight of lead-acid

          • Very stable for long-term float charging

      Cell configuration:

      • • • 4S (4 series) structure: 3.2V × 4 = 12.8V

          • Capacities: 100Ah / 150Ah / 200Ah / 250Ah / 300Ah / 314Ah

      Cell types:

      • • • Prismatic aluminum case cells

          • Cylindrical 32700 / 32135 cells

          • Large-capacity pouch cells (used by some manufacturers)

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      2. BMS (Battery Management System)

      Core protections:

      • • • Overcharge protection

          • Over-discharge protection

          • Over-current & short-circuit protection

          • Cell balancing (improves lifespan)

          • Over-temperature protection (cutoff at 55–70°C)

          • Low-temperature charging protection (charging disabled below 0°C)

      Optional features:

      • • • Bluetooth APP monitoring

          • RS485 / RS232 communication

          • CAN communication (compatible with smart inverters)

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      3. Battery Housing (Usually Lead-acid Standard Case)

      Advantages:

      • • • Same dimensions as lead-acid → direct drop-in replacement

          • ABS flame-retardant enclosure

          • Shockproof, dustproof, moisture-resistant (IP67 upgrade available)

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      4. Copper Busbars / Wiring Assembly

      • • • Connect cells to the BMS

          • Larger capacities (250Ah–314Ah) use thicker busbars for high-current output

      Typical discharge capability:

      • • • Continuous: 100A–200A

          • Peak: 200A–400A (depending on BMS)

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      III. Performance Advantages Compared with Lead-acid Batteries

      Feature	Lead-acid	LiFePO₄	Advantage
      Cycle life	300–500 cycles	3000–6000 cycles	➤ Up to 10× lifespan
      Usable capacity	~50%	100%	➤ Higher usable energy
      Weight	Very heavy	50–70% lighter	➤ More portable
      Charging efficiency	~70%	98%	➤ Faster, more efficient charging
      Max discharge current	Low	High	➤ Supports high-power inverters
      Safety	Possible leakage/acidity	No leakage, no combustion	➤ Much safer