Lead-to-Lithium Battery 12.8V 50Ah
Model: SCLFP-12.8V-50

Product Overview
Is the SCLFP-12.8V-50 the Right Capacity for You?
Best suited for
The 640Wh 12.8V 50Ah is the mid-range workhorse for 12V solar setups, powering an evening of LED lighting, a compressor fridge, device charging, and fans with comfortable reserve. It is widely used in caravans, motorhomes, boats, traffic and security equipment, and small off-grid cabins replacing 50 to 60Ah flooded or AGM batteries. The 50A continuous output supports small inverters, giving roughly 500 to 600W of AC capacity for short tasks.
Typical loads this capacity handles
Typical loads for the 50Ah pack: LED lighting throughout an evening, a compressor fridge cycling overnight at moderate ambient temperature, a router and entertainment devices, and phone charging, all on the same battery. A 500 to 600W inverter handles a TV, laptop, or coffee maker for short periods. In very hot weather the fridge draws more, which is when the 60Ah earns its price.
Estimated runtime
Runtime example: approximately 575Wh usable. Lighting and a compressor fridge averaging 50W together run for about 11 to 12 hours; a light 25W load alone lasts over 23 hours. A 500W inverter load drains the pack in roughly 1 hour 10 minutes of continuous use, so inverter appliances should be short tasks.
Sizing advice
Select the 50Ah when you want the most balanced blend of capacity, 22.8 by 13.8 by 20.8 cm size, and price for single-night 12V autonomy. It is the safest default if you are unsure between the 45Ah and 60Ah: the extra headroom over the 45Ah keeps daily depth of discharge lower. Move to the 60Ah only when you consistently add one more load or want a second night of backup.
Technical Specifications
- Voltage
- 12.8V
- Capacity
- 50Ah640WH
- Discharge Current
- 50A
- Battery Type
- LiFePO4
- Dimensions
- 22.8*13.8*20.8CM
Key Advantages
- ✓50Ah640WH 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 50Ah 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 50Ah power my home during an outage?
The Lead-to-Lithium Battery 12.8V 50Ah provides 640Wh of stored energy (approximately 576Wh 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 1.2 hours. At 1,000W, runtime is approximately 0.6 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 50Ah 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 50Ah 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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