Why Sunpal Is Moving from Lead-Acid to Lithium (LiFePO₄) Batteries
To deliver higher performance, longer lifespans, and safer energy storage for our customers, Sunpal is transitioning our mainstream offerings from traditional lead-acid to advanced Lithium Iron Phosphate (LiFePO₄). Here’s what that means for reliability, total cost of ownership, and your day-to-day experience.
Integrated BMS for safety & longevity
Lower lifetime waste vs. lead-acid
What’s Changing—and Why
Limitations of Lead-Acid
- Shorter cycle life (typically a few hundred cycles at 50% DoD).
- Heavier & bulkier, reducing usable capacity per kg.
- Slow charging and higher maintenance sensitivity.
- Lower usable capacity (recommended shallow discharges to preserve life).
Advantages of LiFePO₄
- Long service life: thousands of cycles under proper use.
- High usable capacity: up to ~80–100% DoD depending on use case.
- Fast charging with high round-trip efficiency.
- Lighter & compact for the same or greater usable energy.
- Stable chemistry with integrated BMS protections.
Side-by-Side at a Glance
Lead-Acid
- Shorter cycle life
- Heavy for capacity
- Lower efficiency
- Slower charge rates
- More maintenance care
LiFePO₄
- Long lifespan (thousands of cycles)
- Lightweight, compact energy
- High round-trip efficiency
- Faster charging potential
- Built-in BMS safety controls
Actual performance depends on model, temperature, charge profile, and application. Sunpal provides application-specific guidance to maximize lifespan.
What This Means for Total Cost of Ownership (TCO)
- Fewer replacements: Long cycle life means lower replacement frequency.
- More usable energy: Higher DoD delivers more real-world capacity from the same nameplate.
- Energy savings: Better efficiency reduces charge losses over time.
- Lower downtime: Faster charging and predictable performance.
Safety, Quality & Compliance
Built-In Protection
Every Sunpal LiFePO₄ pack includes a smart BMS for over/under-voltage, over-current, short-circuit, and thermal protections.
Certified Confidence
Sunpal lithium products are CE & RoHS certified and engineered for consistent, repeatable quality.
Ideal Applications
- Solar energy storage (home, shop, and off-grid)
- Automotive, RV & marine house batteries
- Backup power & critical loads
- Light industrial & mobility solutions
Quick FAQs
Can I replace lead-acid with lithium one-for-one?
Often yes, but verify charging profile, voltage range, and BMS limits. Sunpal can advise on drop-in replacements and required charger settings.
Do I need a special charger?
Use a charger with a LiFePO₄ charging profile. Many MPPTs and inverters support lithium presets—set absorption/float per the Sunpal datasheet.
Are lithium batteries safe?
LiFePO₄ is a thermally stable chemistry. With Sunpal’s BMS and proper installation, it’s a robust, safe option for energy storage.
Make the Switch with Sunpal
Ready for longer life, higher usable energy, and reliable performance? Our team will size the right LiFePO₄ pack and charging profile for your application.
