Inverter & Battery for Lagos — LiFePO4 vs Tubular
Battery type · sizing guide · brand ranking · lifespan & cost per cycle
Inverter + battery na the quiet backbone of every working Lagos backup-power setup. The battery na where most decision dey wrong — wrong chemistry, wrong size, no-name brand. This page get the matter straight: lithium-iron-phosphate (LiFePO4) wey better than tubular lead-acid for almost every use case, with reason and price.
| Spec | LiFePO4 | Tubular lead-acid |
|---|---|---|
| Lifespan | 8–12 years | 3–5 years |
| Cycle count | 3,000–6,000 | ~1,200 |
| Usable depth of discharge | 90%+ | 50% |
| Maintenance | None | Water top-ups, every 3 mo |
| Weight | ½ tubular for same kWh | Heavy |
| Warranty | 5–10 yrs | 1–2 yrs |
| Upfront cost per kWh | ~₦650K–₦950K | ~₦350K–₦450K |
Lifecycle cost (cost per kWh wey e go deliver over lifespan): LiFePO4 ~₦25-₦40, tubular ~₦80-₦150. The lithium dey cheaper long-term despite higher upfront.
Lithium (LiFePO4)
Tier 1 (best warranty + reliability): Pylontech, BYD, Felicity Solar. These na Chinese tier-1 manufacturer with global supply chain — battery comes with 5-10 year warranty and replacement available for Lagos. Tier 2 (good value): Luminous Lithium, Genus.
Tubular lead-acid
Luminous (most widely available), Trojan (US import, premium), Exide. Avoid no-name import — dem usually die within 12-18 months. The brand difference dey more pronounced for tubular than for lithium because the chemistry get more failure mode.
Sizing na simple: (a) sum up watts of each appliance that go run; (b) multiply by hour you go run am; (c) divide by usable battery capacity. For LiFePO4, usable na 90% of rated; for tubular, 50%.
Example: small home using 5 kWh per night → for LiFePO4 you need 5.6 kWh rated (e.g. 2× 3 kWh module). Same load for tubular need 10 kWh rated (e.g. 4× 200Ah/12V battery in series). Always oversize 20% for cloudy/rainy day.
If you dey plan solar, the battery na 40-60% of system cost. Choose well.
Inverter cover quiet hour, generator handle high load. Most Lagos premium home dey use this hybrid.