Description
The Mercury Lithium LiFePO4 51.2V 100Ah 5kWh is a 5kWh lithium iron phosphate battery built for Nigerian homes, offices and shops that want long, quiet backup without the yearly replacement cost of lead-acid.
It stores 5120Wh (5.12kWh) of energy, delivers 4608Wh usable per cycle, and gives about 9 hours at a steady 500W load, or roughly 4.5 hours at 1kW. It pairs with 48V hybrid/solar inverters from 3.5kVA to 11kVA, and up to 15 units can be connected in parallel as your power needs grow.
Why it is worth it
- Premium-grade LiFePO4 cells6000+ cycles and a 5-year warranty. That is 10+ years of daily use, compared with 2 to 3 years for tubular batteries.
- Smart BMS protectionOver-charge, over-discharge, over-current, short-circuit and over-temperature protection built in.
- Talks to your inverterCAN, RS485 communication gives accurate state-of-charge with 10+ inverter brands.
- WiFi and Bluetooth monitoringCheck charge level and battery health from your phone.
- Wall-mounted or floor-standingSlim, clean cabinet with a built-in LCD display.
- Scales with youExpand from 1 to 15 units in parallel as your needs grow.
- Zero maintenanceNo water top-ups, no fumes, no monthly checks.
- Fire-safe designBuilt-in fire protection devices and UN38.3 certified cells.
Specifications
Electrical
| Battery type | Lithium iron phosphate (LiFePO4) |
|---|---|
| Nominal voltage | 51.2V (48V system) |
| Rated capacity | 100Ah |
| Total energy | 5120Wh (5.12kWh) |
| Usable energy | 4608Wh (90% DoD) |
| Voltage window | 44.8–58.4V |
| Fast charge / float voltage | 57.6V / 56.0V |
| Low-voltage cut-off | 46.8V |
| Max continuous discharge | 100A |
| Max pulse discharge | 150A (1 s) |
| Max continuous charge | 50A |
Protection and connectivity
| Smart BMS | Over-charge, over-discharge, over-current, short-circuit and over-temperature protection |
|---|---|
| Communication | CAN, RS485 (compatible with 10+ inverter brands) |
| Monitoring | WiFi and Bluetooth app monitoring |
| Scalable | 1 to 15 units in parallel |
| Safety standard | UN38.3, MSDS |
Life and build
| Cycle life | 6000+ cycles (25°C, 0.2C, 80% DoD, 60% EOL) |
|---|---|
| Design life | 10+ years |
| Installation | Wall-mounted or floor-standing |
| Terminals | Double M8 |
| Working temperature | 10°C to 50°C |
| Product size (L × W × H) | 640 × 390 × 178 mm |
| Net / gross weight | 55 kg / 60 kg |
| Warranty | 5 years |
What is in the box
- 1 × Mercury Lithium LiFePO4 51.2V 100Ah 5kWh battery
- Battery power cables
- Communication cable for inverter integration
- User manual and warranty card
Ideal for
Homes, apartments, small offices, shops, clinics and estates that need reliable daily backup from the grid or solar. Our engineers size the battery to your load and inverter, and installation is available in Lagos and nationwide.
Frequently asked questions
Which inverter does it work with?
Any 48V inverter. For best results use a hybrid or solar inverter that supports lithium communication (CAN, RS485), so the inverter reads the battery directly. Ask us to confirm compatibility with your existing unit.
How long will it last?
6000+ cycles at 80% depth of discharge. At one full cycle a day that is well over 10 years, compared with 2 to 3 years for tubular batteries.
Can I charge it with solar?
Yes. It charges from solar through a hybrid inverter or MPPT charge controller, and from the grid or a generator through your inverter charger.
Can I add more batteries later?
Yes. Up to 15 units of the same model can be connected in parallel.
Need help choosing?Chat with a Mercury consultant for a quote, sizing advice or installation.
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