5.12kWh 48V Lithium Iron Battery
Battery
5.12 kWh LFP battery (server-rack), 7,000+ cycle life at 80% DoD.
Normalized price
$508 per kWh
$2,599 listed price
Methodology: lowest in-stock merchant price · normalized to nameplate
long-cycle, hot-climate installs (LFP thermal stability)
The data
Specifications
Capacity
| Capacity (nominal) | 5.12 kWh |
|---|---|
| Chemistry | LFP |
Electrical
| Nominal voltage | 51.2 V |
|---|---|
| Voltage range | 44.8–56.8 V |
| Max continuous discharge | 5.12 kW |
| Max continuous charge | 5.12 kW |
Lifecycle & warranty
| Cycle life (80% DoD) | 7,000 cycles |
|---|
Installation & comms
| Stackable | Yes |
|---|---|
| Installation type | server rack |
| Communications | RS-485, CAN bus |
| UL listings | UL1973, UL9540A |
Physical
| Dimensions | 492 × 442 × 155 mm |
|---|---|
| Weight | 45.2 kg |
| Enclosure rating | IP20 |
| Operating temp. | -20°C to 55°C |
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Editorial
Best for, watch out for
Best for
- long-cycle, hot-climate installs (LFP thermal stability)
- critical-loads-only backup (fridge, lights, network)
- semi-DIY scale-out via additional rack units
The market
Price history
Price history
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The shortlist
Three alternatives we'd consider
Common questions
What people ask about the 5.12kWh 48V Lithium Iron Battery
LFP vs NMC — does the chemistry actually matter?
EG4 5.12kWh 48V Lithium Iron Battery is LFP (lithium-iron-phosphate) — the chemistry now standard in residential storage. LFP runs cooler, doesn't have the runaway-fire risk profile of NMC, and tolerates 100% depth-of-discharge without warranty hits. It's slightly heavier and slightly less energy-dense than NMC, but for stationary residential use those are non-issues. LFP is the right choice — it's what we'd recommend either way.
What's the real usable capacity vs the spec sheet number?
EG4 5.12kWh 48V Lithium Iron Battery is rated 5.12kWh and (per the manufacturer) full DoD is in-warranty. In practice we'd still plan to use ~95% to leave reserve for the BMS to balance cells and to handle the small efficiency loss at the very bottom of the discharge curve.
How realistic are the cycle-life claims?
EG4 5.12kWh 48V Lithium Iron Battery is rated 7,000 cycles to 80% DoD — that's 19 years if the battery cycles once per day, every day. In real residential use the battery typically only fully cycles 200–300 times per year (it's partially-charged most of the time), so the practical lifespan tends to be longer than the cycle math suggests. Calendar aging — what happens to the cells regardless of cycling — is the bigger long-term factor.
Can I parallel multiple 5.12kWh 48V Lithium Iron Battery units?
Yes — EG4 5.12kWh 48V Lithium Iron Battery is stackable. We don't have the maximum stack capacity confirmed. Confirm with the manufacturer or installer how many units can parallel into a single bank, and check that your inverter supports the resulting battery voltage and capacity.
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