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High-Capacity Power for Demanding 12V Systems
Bridge the gap between standard and industrial sizes. Our Group 31 LiFePO4 battery offers a substantial boost in capacity over Group 24/27 models, delivering extended runtime for serious off-grid enthusiasts and demanding marine applications, all while maintaining a versatile form factor that fits many standard compartments.
Benefits of Haicen Smart Group31 Batteries:
Substantial Capacity Upgrade:
Provides significantly more usable energy (Ah) than Group 27 batteries, making it the ideal choice for users who have outgrown smaller sizes but don't require the massive footprint of a Group 49.
Robust Performance for High-Draw Devices:
Excellently suited for powering large inverters, efficient trolling motors, and extensive 12V appliance loads for extended periods.
The Sweet Spot for Many Users:
Offers the best balance of high capacity and relatively widespread compatibility in RVs, boats, and overlanding vehicles.
Superior to Lead-Acid:
Even at this size, it represents a massive weight savings and lifespan improvement over any lead-acid equivalent.
The LiFePO4 batteries VS Lead-acid batteries:
| Haicen LiFePO4 batteries | VS | Old technology -Lead-acid batteries |
| Stable discharge condition | Low temperature condition | Unstable discharge condition |
| 3,500 times | Cycle life | ＜500 times |
| Around 10 years | Design life | 3 years |
| As little as 3.5 hours | Charging time | Up to 8 hours |
| No memory, opportunity charge | Charge frequency | Must charge after use |
| Multiple built-in protections, high thermal and chemical stability | Safety | Gas inside may cause explosion |
| 85% or more nominal capacity achieved at high working load | Available capacity | Only 30%~50% nominal capacity achieved under high working load |
| Maintenance-free | Maintenance | Regular water-adding and inspection required |
| Pollution-free | Eco-friendly | Lead is a toxic substance, may cause human lead poisoning |
| Extremely low | Energy loss | 15% |
Key Points for Quality control:
Cell match: More strict cell matching standard, the difference of lnternal resistance is 1mΩ and voltage is 5mV.
Automatic cells welding: Cells are assembled by Automatic welding equipments to ensure the quality reliability and consistency.
100% Cycle test: All battery packs are 100% cycle tested (Fully Discharged→Fully Charged→Fully Discharged→60% Charged) before package and all test reports are stored.
Unique tracking number: All battery packs are lasered an unique number on the case side for quality tracking.
Certifications:
| UL1642(Cell) | IEC62619 (Cell) | UN38.3(Cell/ Pack) |
| IEC62133(Cell) | ROHS(Cell) | CE(Pack) |
Battery Dimensions:
Internal Structure of Haicen Smart Group31 Batteries:
SOC Display (optional):
Characteristics Curve:
Ideal For: Full-time RVers, serious boaters with large power demands, overlanding vehicles, and as a compact but high-capacity bank for large solar installations.
Customized items:
Bluetooth App design: Help you to design and upload customized App, or supply you our Source code for your design.
Case color: Customized case color is acceptable based on quantity more than 300pcs per batch.
Label design: We can help you to design customized label on the battery.
Carton design: Customized carton is acceptable based on quantity more than 200pcs per batch.
Certificates: 50% discount on certificates cost for first bulk order and 100% reback for future orders.
NDA agreement: NDA agreement is allowed and necessary to protect your benefits.
Step Up to Serious Power. See if your compartment fits a Group 31 and experience a significant capacity upgrade.
| TECH & SPECS | Model | ||||||
| HCG31S-12132BT | HCG31S-12132BH | HCG31S-12150BT | HCG31S-12150BH | HCG31S-12165BT | HCG31S-12165BH | ||
| Electrical Specifications | Nominal Voltage | 12.8V | 12.8V | 12.8V | 12.8V | 12.8V | 12.8V |
| Nominal Capacity | 132Ah | 132Ah | 150Ah | 150Ah | 165Ah | 165Ah | |
| Parallel Connection | Max. 6units | Max. 6units | Max. 6units | Max. 6units | Max. 6units | Max. 6units | |
| Serial Connection | Max. 4units | Max. 4units | Max. 4units | Max. 4units | Max. 4units | Max. 4units | |
| BMS | 4S150A | 4S150A | 4S150A | 4S150A | 4S150A | 4S150A | |
| Bluetooth | Android/IOS | Android/IOS | Android/IOS | Android/IOS | Android/IOS | Android/IOS | |
| Heat | No | Yes | No | Yes | No | Yes | |
| Circuit Protection | Over charge, Over discharge, Over current, Over temp, Short, Balance, Low temp | ||||||
| Cycle Life | 3000times Cycles @100%DOD and 6000times @80% DOD | ||||||
| Self Discharge | Less than 3% per month | ||||||
| Charge Efficiency | 100%@0.2C | ||||||
| Discharge Efficiency | 98-100%@1C | ||||||
| Charge Specifications | Charge Voltage | 14.4±0.2V | 14.4±0.2V | 14.4±0.2V | 14.4±0.2V | 14.4±0.2V | 14.4±0.2V |
| Standard Current | 26A | 26A | 30A | 30A | 33A | 33A | |
| Fast Current | 66A | 66A | 75A | 75A | 82A | 82A | |
| Discharge Specifications | Standard Current | 26A | 26A | 30A | 30A | 33A | 33A |
| Max. Con. Current | 132A | 132A | 150A | 150A | 150A | 150A | |
| Peak Current | 800A(300ms) | 800A(300ms) | 800A(300ms) | 800A(300ms) | 800A(300ms) | 800A(300ms) | |
| Cut-off Voltage | 10V | 10V | 10V | 10V | 10V | 10V | |
| Mechanical Specifications | Dimensions (mm) | 330x173x216mm(Group 31) | |||||
| Approx Weight(KG] | 15 | 15.5 | 15.5 | 16 | 15.5 | 16 | |
| Terminal Type | M8 | ||||||
| Case Color/material | Black Plastic case(ABS) | ||||||
| IP Rating | IP65 | ||||||
| Cell Type | Cylinder LiFePO4 cell | ||||||
| Cell holder | Yes | ||||||
| Temperature Specifications | Charge Temp | 0℃ to 55℃ (32℉ to 131℉) | -20℃ to 55℃ (-4℉ to 131℉) | 0℃ to 55℃ (32℉ to 131℉) | -20℃ to 55℃ (-4℉ to 131℉) | 0℃ to 55℃ (32℉ to 131℉) | -20℃ to 55℃ (-4℉ to 131℉) |
| Discharge Temp | -20℃ to 60℃ (-4℉ to 140℉) | ||||||
| Storage Temp | -5℃ to 45℃ (23℉ to 113℉) | ||||||
A deep cycle battery is designed to provide sustained power over extended periods and can be discharged up to 80% of its capacity repeatedly without damage. Unlike automotive starter batteries (which deliver short, high-current bursts for engine ignition), deep cycle batteries prioritize deep discharges and recharges. They feature thicker plates and denser active material to withstand cycling stress, making them ideal for renewable energy, marine, RV, and industrial applications.
While possible in emergencies, it is not recommended. Deep cycle batteries require chargers with tailored voltage/amperage profiles (e.g., bulk/absorption/float phases for lead-acid; CC/CV for lithium). Using an incompatible charger may cause undercharging, overcharging, or reduced lifespan. Always use a charger specifically designed for your battery’s chemistry (e.g., lead-acid, AGM, gel, or LiFePO4).
Yes, they are commonly used in off-grid and hybrid solar systems due to their ability to handle daily charge/discharge cycles. LiFePO4 batteries are increasingly preferred for solar applications thanks to their higher DoD tolerance, faster charging, longer lifespan, and minimal maintenance compared to traditional lead-acid batteries. Ensure compatibility with solar charge controllers and system voltage requirements.
