CERRNSS 48V 300Ah LiFePO4 Battery Specifications
Switching to solar power is a smart move, but the real challenge lies in storing that energy for the night or cloudy days. Many people in Pakistan and globally are moving away from traditional lead-acid batteries because they fail quickly and require high maintenance. The CERRNSS 48V 300Ah LiFePO4 battery pack is designed to solve this exact problem. It offers a massive 15kWh of storage, which is enough to run a medium-sized house or a heavy-duty RV setup. This review focuses on a real-world use case: providing a stable 48V power supply for high-load inverters. We will look at its performance without the marketing hype to see if this lithium solution actually saves money in the long run or if it is just an expensive trend.
What is this product?
The CERRNSS 48V 300Ah is a high-capacity Lithium Iron Phosphate (LiFePO4) battery pack. Unlike standard 12V batteries that you have to connect in a series, this is a single, integrated unit providing 51.2V nominal power. It is specifically built for home energy storage systems and solar setups. The unit comes in a metal cabinet, often with wheels for easier movement, and includes a built-in Battery Management System (BMS). This BMS acts as the “brain” of the battery, protecting it from overcharging, heat, and short circuits. It is designed to replace old-school battery banks with a cleaner, more efficient, and longer-lasting technology.
Key Features
CERRNSS 48V 300Ah LiFePO4 Battery Specifications
- ✅ 15kWh Massive Capacity: With 300Ah at 48V, this battery can store enough energy to run air conditioners and heavy appliances during load shedding.
- ✅ 10,000 Plus Life Cycles: It is rated for over 10,000 cycles, which means it can potentially last for 10 to 15 years depending on usage.
- ✅ Integrated Smart BMS: Features a 200A BMS that ensures the cells stay balanced and safe during high-current discharge.
- ✅ PC Monitoring Support: You can connect the battery to a computer via CAN or RS485 ports to check the health of individual cells.
- ✅ Grade A Cells: Uses high-quality LiFePO4 cells which provide better thermal stability and energy density compared to cheaper alternatives.
- ✅ Easy Mobility: Despite its weight, the included wheels make it easier to position inside your home or solar room.
Real Pros & Cons
CERRNSS 48V 300Ah LiFePO4 Battery Specifications
| Pros: | Cons: |
| ✅ High Efficiency: Unlike lead-acid batteries that lose energy as heat, this LiFePO4 pack has an efficiency rate of over 95 percent. | ❌ High Upfront Cost: The initial price is much higher than lead-acid batteries, which can be a barrier for many buyers. |
| ✅ Zero Maintenance: You don’t need to check water levels or clean acid terminals; it is a “set it and forget it” system. | ❌ Weight Issue: At 300Ah, this unit is extremely heavy, making it difficult to carry up stairs or install in tight RV spaces. |
| ✅ Compact Design: It takes up much less space than 8 or 12 lead-acid batteries required for a similar 15kWh setup. | ❌ Professional Installation Required: This is not a simple “plug and play” toy; it requires proper cable sizing and inverter settings to avoid damage. |
| ✅ Constant Voltage: It maintains a steady 48V-52V output even when the battery is low, keeping your inverter running smoothly. | ❌ Temperature Sensitivity: While LiFePO4 is safe, it cannot be charged in freezing temperatures (below 0 degrees Celsius) without a heating system. |
Who should buy / who should not
- Who Should Buy This:
- This battery is perfect for homeowners who want to get rid of daily load shedding and have a reliable 48V solar inverter. It is also an excellent choice for full-time RV living for beginners who need enough power to stay off-grid for days. If you are looking for a long-term 10-year investment and want to avoid the headache of changing batteries every 2 years, this is for you.
- Who Should Not Buy This:
- If you only need a small backup for a few lights and fans, this 15kWh beast is overkill and too expensive. It is also not suitable for people who move their setup frequently, as the weight makes it very difficult to transport without help.
Helpful Buying Guide
CERRNSS 48V 300Ah LiFePO4 Battery Specifications
When looking for a 48V LiFePO4 battery price in Pakistan or internationally, always check the BMS rating. For a 300Ah battery, a 200A BMS is the standard you should look for. Make sure the seller offers “EU Stock” or local warehouse shipping to avoid massive customs duties. Always verify if the battery is compatible with your specific inverter brand (like Growatt, Voltronic, or Victron) via the CAN/RS485 communication protocol. Buying a battery with “Grade A” cells is critical because Grade B or C cells will fail much sooner than the promised 10,000 cycles.
How to use the 48V LiFePO4 Battery
CERRNSS 48V 300Ah LiFePO4 Battery Specifications
- 1. Placement: Place the battery on a flat surface in a ventilated area. Use the wheels to move it into position but lock them once set.
- 2. Connection: Use heavy-gauge copper cables to connect the positive and negative terminals to your inverter. Ensure the polarity is correct.
- 3. Inverter Settings: Set your inverter to “Lithium” or “User-Defined” mode. Adjust the charging voltage to 56.4V and the cut-off voltage to 48V as per the manual.
- 4. Monitoring: Use the RS485 or CAN cable to link the battery to your inverter or PC for real-time data tracking.
- 5. Maintenance: Check the cable connections every 6 months to ensure they remain tight and free of dust.
Price
- The CERRNSS 48V 300Ah 15kWh Battery Pack is currently available on AliExpress for approximately $1,185.07. This is often a discounted price from the original $2,403.80.
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Frequently Asked Questions (FAQs)
- How long does a 15kWh battery last on a full charge?
- If you draw a constant 1000W (1kW) load, this battery will last for approximately 15 hours. For a typical home using fans, lights, and a fridge, it can easily last 24 to 30 hours.
- Is it safe to keep this battery inside the house?
- Yes, LiFePO4 technology is much safer than Lithium-ion (NCM). It does not catch fire easily and does not release toxic fumes like lead-acid batteries.
- Can I connect two of these batteries together?
- Yes, most 48V lithium systems allow you to connect multiple units in parallel to increase your total storage to 30kWh or more.
- What is the weight of a 48V 300Ah battery?
- A unit of this size typically weighs between 110kg to 130kg. This is why the included wheels are a necessary feature.