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ReliOn LiFePO4 Lithium Battery 12V 75Ah
ReliOn 12V 75Ah (960Wh) LiFePO4 lithium deep cycle battery, ideal for motorhomes, boats, and electric vehicles. Replaces lead-acid batteries with more usable capacity, more life cycles, and much less weight (10.7 kg versus over 20 kg for an equivalent AGM). Internal BMS with built-in protection.
ReliOn LiFePO4 12V 75Ah Lithium Battery: Reliability and Deep Cycle
The ReliOn RB75 is a lithium battery rated at 12.8V nominal and 75Ah (960Wh), designed for demanding applications with much lower weight than an equivalent lead-acid battery. It's a common choice for motorhomes, boats, and electric vehicles.
Use Cases: Where This 12V 75Ah Lithium Battery Performs Best
Motorhomes and Campers
A lithium motorhome battery like this one can power fridges, LED lighting, inverters, and other equipment for longer, using practically 100% of its rated capacity thanks to its tolerance for deep discharge.
Solar Installations
Combined with solar panels and an MPPT regulator, this solar panel battery efficiently stores the energy generated, with 99% charge/discharge efficiency.
Marine Use
Onboard, the weight savings compared to an equivalent lead-acid battery are significant (10.7 kg versus over 20 kg), which improves handling on the water and makes installation easier in tight spaces.
Lithium Battery vs. AGM/Gel: Why Choose LiFePO4
Compared to an equivalent AGM or Gel battery, this 12V 75Ah lithium battery offers several advantages: greater usable depth of discharge, far more charge and discharge cycles over its lifespan, much lower weight, and an internal BMS that protects against overcharge, over-discharge, and short circuit. In exchange for a higher upfront investment, the cost per cycle and per Wh used is typically lower over the medium term.
Installation and Compatibility
The RB75 works with standard 12V chargers, solar charge controllers, and inverters. Its internal BMS manages cell protection, so no additional external controller is required for normal home use. It's recommended to stay within the charging temperature range stated in the technical datasheet and to use wiring and terminals
REL-RB75
| Nominal voltage | 12.8V |
|---|---|
| Capacity | 75Ah |
| Energy | 960Wh |
| Internal resistance | ≤30mΩ (at 50% SOC) |
| Charge/discharge efficiency | 99% |
| Recommended charge current | 3.7-37.5A |
| Maximum charge current | 75A |
| Recommended charge voltage | 14.2-14.6V |
| BMS charge cut-off voltage | 15.6V |
| Continuous discharge current | 75A |
| Peak discharge current | 150A (7.5s ±2.5s) |
| BMS discharge cut-off voltage | 8V |
| BMS cut-off current | 280A ±50A |
| Discharge temperature | -20°C to 60°C |
| Charge temperature | -20°C to 45°C |
| Storage temperature | -5°C to 35°C |
| BMS high temperature cut-off | 80°C |
| Dimensions | 260 x 168 x 210 mm |
| Weight | 10.7 kg |
| Terminals | M8 x 1.25 x 12mm |
| Case | ABS |
| Protection rating | IP66 |
| Cell type | Cylindrical LiFePO4 |
| Certifications | UN38.3, CE, UL1642, IEC62133, UN 3480 Class 9 |
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