Lead-to-Lithium Battery 12.8V 45Ah
Model: SCLFP-12.8V-45

Product Overview
Is the SCLFP-12.8V-45 the Right Capacity for You?
Best suited for
With 576Wh, the 12.8V 45Ah covers a full evening of mixed 12V loads — lighting, ventilation fans, phone and device charging, and intermittent fridge use. It is a frequent upgrade for caravans, boats, solar garden and signage systems, and off-grid monitoring stations replacing 40 to 50Ah lead-acid batteries. The 45A discharge (about 540W) handles small inverters for laptop and tool charging, though not sustained high-wattage AC appliances.
Typical loads this capacity handles
Typical loads for the 45Ah pack: an evening of cabin or caravan lighting, a 12V fridge for around half a day of cycling, ventilation and water pumps for short runs, plus device charging. A 500W inverter covers a laptop, TV, or small kitchen appliance intermittently. Running air conditioning or heating from this pack is not realistic — those loads point toward the 100Ah-plus range.
Estimated runtime
Runtime example: roughly 520Wh usable. Lighting plus a fridge cycling at an average 40W gives about 13 hours; a steady 25W evening load runs for over 20 hours. At 100W of inverter draw the pack lasts around 5 hours. These figures assume cells and fridge are in normal, not extreme, ambient temperature.
Sizing advice
The 45Ah shares the 22.3 by 9.5 by 17.5 cm case with the 30Ah, so it is a simple capacity bump on the same mounting footprint — usually the best value upgrade where tray space is fixed. Choose it over the 50Ah when budget leads and the extra 64Wh is not essential; choose the 50Ah if you want the margin to protect battery longevity, since staying above deeper discharge levels extends cycle life.
Technical Specifications
- Voltage
- 12.8V
- Capacity
- 45Ah576WH
- Discharge Current
- 45A
- Battery Type
- LiFePO4
- Dimensions
- 22.3*9.5*17.5CM
Key Advantages
- ✓45Ah576WH of Grade A LiFePO4 storage with about 90% usable energy and 2000-4000 cycle life
- ✓Standard drop-in footprint that replaces lead-acid batteries with no tray or wiring modification
- ✓5-year warranty with CE, UN38.3, and MSDS certification as standard
- ✓Factory-direct wholesale pricing and full OEM/ODM customization from CMJ Solar
Applications
Shipping & Warranty
Worldwide Shipping
Global shipping via sea freight and express courier. FOB Shenzhen or EXW Jiangmen terms available. Production lead time 10-20 days depending on order volume and customization requirements.
Warranty & Support
5-year warranty on battery systems. LiFePO4 cells rated for 2000-4000 cycles. BMS protection, WIFI monitoring, and technical support included. Spare parts available throughout warranty period.
Frequently Asked Questions
What warranty does this product come with?
The Lead-to-Lithium Battery 12.8V 45Ah comes with a 5-year warranty covering the LiFePO4 battery cells and integrated BMS. Our LiFePO4 cells are rated for 2,000-4,000 charge-discharge cycles, providing 5-10 years of reliable daily use under normal operating conditions. Spare parts and technical support are available throughout the warranty period.
What is the MOQ (Minimum Order Quantity)?
The MOQ is typically 20 units per model for standard products. Sample orders of 1 unit are welcome for testing and evaluation. For OEM/ODM custom packaging or private labeling, the MOQ is 500 units. Contact our sales team for specific pricing based on your order volume.
How long can the Lead-to-Lithium Battery 12.8V 45Ah power my home during an outage?
The Lead-to-Lithium Battery 12.8V 45Ah provides 576Wh of stored energy (approximately 518Wh usable at 90% depth of discharge). At an average essential-load draw of 500W (lights, router, refrigerator, and TV), it can sustain power for approximately 1 hours. At 1,000W, runtime is approximately 0.5 hours. Actual runtime depends on total connected load and usage patterns.
Is this a direct drop-in replacement for lead-acid batteries?
Yes. The Lead-to-Lithium Battery 12.8V 45Ah is designed as a direct drop-in replacement for equivalent lead-acid batteries. It matches the standard form factor and terminal positions of conventional lead-acid batteries while delivering 12.8V LiFePO4 chemistry. Simply remove the old lead-acid battery, place the LiFePO4 unit in the same compartment, and connect the existing cables. We recommend setting your charger or charge controller to the LiFePO4 charging profile for optimal performance and lifespan.
How long does the LiFePO4 battery last?
The LiFePO4 cells in the Lead-to-Lithium Battery 12.8V 45Ah are rated for 2,000-4,000 charge-discharge cycles before capacity drops to 80% of the original rating. In a typical daily-cycle residential application, this translates to 5-10 years of service life. LiFePO4 chemistry also offers superior thermal stability and safety compared to lead-acid or NMC batteries, with no maintenance required.
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