QLbattery
QSL12400 12.8V 400Ah LiFePO4 Battery
QSL12400 12.8V 400Ah LiFePO4 Battery
The QSL12400 is a 12.8V 400Ah LiFePO4 (lithium iron phosphate) deep-cycle battery that replaces lead-acid batteries in RVs, marine, solar and off-grid systems, delivering 5.12kWh of energy in a maintenance-free, IP67-rated package.
Built with Grade A LiFePO4 cells, it delivers over 6,000 cycles at 80% depth of discharge (roughly 5x lead-acid cycle life), with smart BMS protection and a 5-year warranty. It provides a stable 10-14.6V working voltage with 200A continuous discharge current, BMS options from 50A to 200A, and series/parallel connection for 24V/48V systems.
Key Specifications
| Nominal voltage | 12.8V |
| Nominal capacity | 400Ah |
| Nominal energy | 5.12kWh |
| Working voltage | 10-14.6V |
| Charge current | 100A |
| Discharge current | 200A |
| Cycle life | >6,000 cycles (80% DOD) |
| Protection | IP67 |
| Operating temperature | Charge 0-45℃ / discharge -20-60℃ |
| Warranty | 5 years |
| Weight | 36.4kg |
| Size | 440*388*154mm |
| Certificates | UN38.3, MSDS, CE, ROHS, FCC |
Applications
- RV and camper house batteries
- Marine and trolling motor power
- Home solar and off-grid storage
- UPS and backup power systems
FAQ
Can it replace my lead-acid battery directly? Yes. It is a drop-in 12V/24V replacement with BMS protection and no acid maintenance.
How long does the QSL12400 last? Over 6,000 cycles at 80% DOD, backed by a 5-year warranty.
Can I connect multiple units in series or parallel? Yes, the QSL series supports series and parallel connection for 24V/48V systems and higher capacity.
Is it safe for indoor use? Yes. LiFePO4 chemistry, smart BMS over-voltage/over-current protection and IP67 enclosure.
Do you support OEM/ODM and bulk orders? Yes, QLbattery is a 15-year LiFePO4 factory supporting customization and wholesale. Contact us for a quote.
QLbattery is a 15-year LiFePO4 energy storage factory supporting OEM/ODM and wholesale. Contact us for pricing, lead time and the latest datasheet.
