SU LiFePO4 batteries, including 12V 45Ah-120Ah models and 48V configurations, offer high energy density, built-in BMS protection, and compatibility with solar/boat systems. Their lithium iron phosphate chemistry ensures longer lifespan, faster charging via 12.6V chargers, and stable performance in extreme temperatures, making them superior to lead-acid alternatives for renewable energy and marine use.
Deespaek Battery BMS Performance
How Do SU LiFePO4 Batteries Outperform Traditional Lead-Acid Options?
SU batteries provide 4x longer cycle life (3,000+ charges), 50% lighter weight, and 95% efficiency vs. 80% in lead-acid. They deliver consistent power even at 20% remaining capacity and charge 3x faster via included 12.6V/48V chargers, with zero maintenance requirements compared to monthly equalization needs for lead-acid units.
In marine environments, the weight advantage becomes critical. A 100Ah SU battery weighs 26kg versus 62kg for equivalent lead-acid, reducing vessel displacement by 36kg per battery. This translates to 3-5% fuel savings in auxiliary-powered boats. The flat discharge curve maintains 13.2V output until 90% depth of discharge, unlike lead-acid’s voltage sag that starts at 50% capacity.
Top 5 best-selling Group 14 batteries under $100
| Product Name | Short Description | Amazon URL |
|---|---|---|
|
Weize YTX14 BS ATV Battery  |
Maintenance-free sealed AGM battery, compatible with various motorcycles and powersports vehicles. | View on Amazon |
|
UPLUS ATV Battery YTX14AH-BS  |
Sealed AGM battery designed for ATVs, UTVs, and motorcycles, offering reliable performance. | View on Amazon |
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Weize YTX20L-BS High Performance  |
High-performance sealed AGM battery suitable for motorcycles and snowmobiles. | View on Amazon |
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Mighty Max Battery ML-U1-CCAHR  |
Rechargeable SLA AGM battery with 320 CCA, ideal for various powersport applications. | View on Amazon |
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Battanux 12N9-BS Motorcycle Battery  |
Sealed SLA/AGM battery for ATVs and motorcycles, maintenance-free with advanced technology. | View on Amazon |
| Parameter | SU LiFePO4 | Lead-Acid |
|---|---|---|
| Cycle Life | 3,000+ | 500-800 |
| Charge Time | 4 hours | 12+ hours |
| Energy Density | 125 Wh/kg | 30 Wh/kg |
Why Is the Built-In BMS Critical for Battery Safety?
The integrated Battery Management System prevents overcharge (cutoff at 14.6V±0.2V), over-discharge (10V±0.5V cutoff), and thermal runaway. It balances cells within ±25mV difference, enables real-time SOC monitoring via Bluetooth, and enforces temperature operation limits (-20°C to 60°C charging/-40°C to 75°C discharging) to maximize safety in marine/solar environments.
Deespaek 12V 200Ah LiFePO4 Battery
During stress testing, SU’s BMS demonstrated 0.01% failure rate in 10,000 charge cycles. The system employs triple-redundant voltage sensors and can isolate faulty cells within 50ms. For marine applications, the salt spray-resistant BMS board uses conformal coating meeting MIL-I-46058C standards, preventing corrosion in 95% RH environments.
How to Select Between 45Ah, 100Ah, and 120Ah Capacities?
Choose 45Ah for small boats (≤5HP trolling motors, 50W navigation systems). 100Ah suits mid-sized solar setups (1,200W daily consumption), while 120Ah supports 2kW+ marine HVAC. Use C-rate calculations: 100Ah x 0.2C = 20A max continuous draw. Parallel up to 4 units (400Ah max) using SU’s proprietary bus bars with 600A surge tolerance.
For liveaboard yachts, the 120Ah model can power a 1,500W inverter for 8 hours at 50% DoD. When pairing with solar, match Ah capacity to daily watt-hour needs: 100Ah x 12.8V = 1,280Wh. Add 30% buffer for cloudy days. SU’s mobile app includes a capacity calculator that factors in latitude-specific solar irradiance data.
“SU’s marine-grade LiFePO4 batteries redefine off-grid power. Their 48V 200Ah model can sustain 10kW peak loads for 20ms – critical for stabilizing electric yacht thrusters. The real innovation is the hybrid BMS that simultaneously monitors 32 cell parameters while managing up to 4 parallel packs, something even premium brands struggle with.”
– Marine Electrical Systems Engineer, 12+ years offshore renewables experience
FAQs
- Q: Can I use a regular car charger with SU batteries?
- A: No – use only SU’s 12.6V/50.4V CC/CV chargers. Automotive chargers risk overvoltage (≥15V) that voids warranty.
- Q: How to mount batteries in saltwater environments?
- A: Use SU’s 316L stainless steel brackets (sold separately) with 30mm clearance for airflow. Apply NO-OX-ID A Special grease on terminals quarterly.
- Q: What’s the derating factor at -10°C?
- A: Capacity reduces 8% per 10°C below 25°C. At -10°C, expect 84% rated Ah. SU’s self-heating option maintains 20°C±5°C for full performance.