When building a solar system, your battery choice is crucial — it determines how much stored energy you have for nighttime use and grid outages. The two main options are lithium (LiFePO4) and lead-acid (tubular) batteries.
Head-to-Head Comparison
Cycle Life
- Lithium: 6,000+ cycles (15+ years)
- Lead-Acid: 500-1,000 cycles (2-4 years)
Usable Capacity
- Lithium: 90-95% of rated capacity
- Lead-Acid: 50% of rated capacity (deeper discharge damages battery)
Weight & Size
- Lithium: 50-60kg for 5kWh. Wall-mountable.
- Lead-Acid: 200-300kg for equivalent. Floor-standing only.
Total Cost of Ownership
While lithium costs more upfront, its 6,000+ cycle life means you'll replace lead-acid batteries 4-5 times before a lithium battery needs replacing. Over 15 years:
- Lithium: ₦550,000 (one battery)
- Lead-Acid: ₦1,200,000+ (4-5 replacements)
Lithium saves you over ₦650,000 in the long run.
The Verdict
Lithium (LiFePO4) is the clear winner for solar energy storage. It's safer, lighter, lasts 5× longer, and is actually cheaper when you factor in the total cost of ownership. At LightHouse Solar, every system we install uses premium lithium batteries for exactly these reasons.