The SU 12V 20Ah LiFePO4 battery is a deep-cycle lithium iron phosphate battery designed for high-performance applications like solar, wind, marine, and mobility systems. With a built-in 20A BMS, it ensures safety, longevity, and stable power delivery. Its lightweight design, 2000+ cycle life, and resistance to extreme temperatures make it superior to traditional lead-acid batteries for renewable energy storage.
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How Does the SU 12V 20Ah LiFePO4 Battery Compare to Lead-Acid Alternatives?
The SU LiFePO4 battery outperforms lead-acid counterparts with 50% less weight, 4x longer lifespan, and 95% efficient energy discharge. Unlike lead-acid, it maintains consistent voltage during discharge cycles and operates in -20°C to 60°C temperatures. It also requires no maintenance and charges 3x faster, reducing downtime in solar or marine applications.
What Safety Features Are Integrated Into the 20A BMS System?
The 20A Battery Management System (BMS) provides overcharge/over-discharge protection, short-circuit prevention, and temperature monitoring. It balances cell voltages, prevents thermal runaway, and automatically cuts power during faults. The BMS also enables real-time monitoring of state-of-charge (SOC) and health indicators via optional Bluetooth modules.
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The BMS employs multilayer protection through microprocessor-controlled sensors. Voltage thresholds are precisely calibrated to disconnect charging at 14.6V (±0.2V) and halt discharge at 10V (±0.5V). Four-stage temperature control activates cooling protocols when internal cells reach 65°C and enables optional self-heating below -10°C. The cell balancing function operates continuously during charging cycles, maintaining voltage differences below 30mV between cells to prevent capacity drift.
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| Protection Feature | Activation Threshold | Response Time |
|---|---|---|
| Overcharge | 14.6V ±0.2V | <100ms |
| Deep Discharge | 10V ±0.5V | <200ms |
| High Temp Cutoff | 65°C ±3°C | <2 seconds |
Which Applications Benefit Most From This Deep-Cycle Lithium Battery?
Optimal uses include off-grid solar arrays, marine trolling motors, fish finders, RV power systems, and electric mobility devices like golf carts. Its deep-cycle design supports daily 80% depth-of-discharge (DoD) without degradation, making it ideal for applications requiring reliable, long-duration power in harsh environments.
Can This Battery Withstand Extreme Temperatures and Marine Environments?
Constructed with IP65-rated casing and corrosion-resistant terminals, it handles saltwater exposure and humidity. The LiFePO4 chemistry maintains 80% capacity at -20°C and prevents thermal expansion issues up to 60°C. Internal heating plates (optional) enable cold-weather charging, unlike standard lithium batteries.
What Maintenance Practices Extend the Battery’s 2000+ Cycle Lifespan?
Requires no watering or equalization charges. Best practices include storing at 50% SOC during long inactivity, using compatible lithium-specific chargers, and avoiding complete discharges. Annual capacity testing and keeping terminals clean optimize performance. The BMS automatically prevents harmful charging states.
How Does the Weight Advantage Impact Portable Power Solutions?
At 6.6 lbs (3kg), it weighs 70% less than equivalent lead-acid batteries. This enables easier installation in marine applications, reduces payload for mobile solar setups, and improves efficiency in ride-on toys. The compact dimensions (7.1″x6.6″x5.1″) allow flexible mounting positions.
The reduced mass directly impacts energy density ratios, achieving 150Wh/kg compared to lead-acid’s 30-50Wh/kg. This enables novel applications like backpack solar generators and aerial drone power packs. In marine house banks, six SU batteries provide equivalent capacity to eight lead-acid units while saving 98lbs – critical for sailboat stability. Emergency responders using portable defibrillators report 40% longer operation times due to reduced carriage weight.
| Battery Type | Weight (12V/20Ah) | Energy Density |
|---|---|---|
| LiFePO4 | 6.6 lbs | 150Wh/kg |
| AGM | 18.7 lbs | 45Wh/kg |
| Flooded Lead-Acid | 22 lbs | 32Wh/kg |
What Certifications Ensure Reliability for Critical Power Systems?
Certified to UN38.3, CE, RoHS, and IEC62133 standards. The battery meets marine ABYC and RVIA compliance requirements. UL1973 certification pending. These ensure safety in flammable environments and compatibility with international renewable energy regulations.
Expert Views
“LiFePO4 technology revolutionizes off-grid energy storage. The SU battery’s 20A BMS addresses historic lithium limitations in marine and cold environments. We’re seeing 40% longer runtime in fish finders compared to AGM batteries, with zero voltage sag during peak loads.” – Renewable Energy Systems Engineer, Marine Power Solutions Group
FAQ
- Q: Can I use my existing lead-acid charger with this battery?
- A: No. Use only LiFePO4-compatible chargers with 14.6V absorption voltage to prevent BMS tripping.
- Q: Does the BMS support parallel/series configurations?
- A: Parallel connections for increased capacity are safe. Series connections require professional balancing systems.
- Q: What warranty applies to deep-cycle applications?
- A: 3-year full replacement warranty covers 80% capacity retention with proper maintenance.