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SunWell Energy

51.2V 5.12kWh LiFePO4 Battery

51.2V 5.12kWh LiFePO4 Battery

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Model

The 51.2V 5.12kWh LiFePO4 Battery is a floor-standing LiFePO4 battery for homes, workshops and small businesses. Standard communication ports pair it with mainstream inverters for straightforward system integration. The floor-standing design installs with basic cabling and no special tools, fitting tight equipment spaces. Its cells are rated for 8000 deep cycles, so the pack keeps delivering through years of daily charge and discharge.

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51.2V 5.12kWh LiFePO4 Battery — Technical Specifications
MODELSW-S-51.2/100-A
Rated Capacity100Ah
Rated Voltage51.2V
Rated Energy5120Wh
Max. Charge Voltage≈56.8V
Cut-Off Voltage≈44.8V
Standard Charge Current≤50A
Standard Discharge Current≤50A
Max.Continuous Discharge Current≤100A
Discharge Cut-Off Current120±5A
Cycle Life>8000 cycles @70% SOH
Net Weight47.5kg
Gross Weight58kg

Features

  • LiFePO4 chemistry delivers safe, long-lasting power. The cobalt-free cells resist thermal runaway and hold capacity through deep daily cycling, rated for years of daily cycling at high state of health.
  • Floor-standing cabinet sits stably in any corner. No racking is needed; the compact enclosure deploys quickly in homes, shops and small commercial spaces.
  • A multi-protocol BMS guards every cell. It tracks per-cell voltage, current and temperature, balances cells and blocks over-charge, over-discharge, over-current and short circuit, talking to inverters over CAN/RS485.
  • Long service life cuts ownership cost. Rated for years of daily cycling, it supports years of daily charge and discharge without premature replacement.
  • Wide operating range suits tough sites. It discharges from a wide temperature band and handles current, staying stable in unconditioned indoor and sheltered spaces.
  • Parallel-ready design grows with you. Add more units on the same bus to expand capacity while keeping the existing inverter and cabling.

Applications

  • Residential Backup: Powers essential home loads through outages with a 5.12kWh bank.
  • Solar Energy Storage: Stores daytime PV for evening and overnight self-consumption.
  • Whole-Home Backup: Pairs with compatible hybrid inverters for broader household coverage.
  • Off-Grid Power: Supplies independent power for cabins and remote homes.
  • Inverter-Brand Flexible Sites: Ideal where GOODWE, Growatt, Victron, or other listed brands are used.
  • Garage and Utility Room: Wall-mounted touchscreen model fits a dedicated wall without floor space.

Battery Safety & Protection

The SW-S-51.2-100-A is built around Lithium Iron Phosphate (LiFePO4) cells, a chemistry known for thermal stability and a low risk of thermal runaway. The cells sit inside a durable metal shell, and five built-in protection functions—over-charge, over-discharge, over-current, short-circuit, and temperature—guard the 16S1P stack during daily cycling.

The unit operates from 0–45°C charging and −10–55°C discharging, with a touchscreen display letting users check status at a glance without extra tools. LiFePO4's stable chemistry and the metal enclosure keep the battery safe in typical indoor wall-mounted installations, avoiding the maintenance and venting needs of older battery types.

Performance & Lifecycle Advantage

Rated at 5.12kWh (100Ah) with a 51.2V nominal output, the SW-S-51.2-100-A delivers stable energy through a ≤50A standard charge/discharge and up to ≤100A max continuous discharge. A max charge voltage of ≈56.8V and cut-off of ≈44.8V define a safe operating window that protects cell health.

The LiFePO4 chemistry provides a long life of more than 8000 cycles at 70% state of health, supporting years of daily cycling. Weighing 47.5kg net with a slim 390×205×595mm form factor, the module suits space-limited homes, and against lead-acid it offers lighter weight, lower maintenance, and better tolerance for frequent deep cycling—lower lifetime cost for home storage.

Warranty

LiFePO4 batteries are backed by a 5-year warranty. If you experience any quality issues within the warranty period, please contact us and we will arrange a replacement or repair promptly.

Frequently Asked Questions

Will this battery work with my inverter?

Yes. It is compatible with 11 major inverter brands including GOODWE, SOFAR, GROWATT, SMA, Victron, PYLONTECH, and others, communicating at 51.2V. Confirm your model during setup.

How long can it power my home?

With 5.12kWh (100Ah) stored, a 500W load runs roughly 9–10 hours, while heavier appliances draw it down faster. It supports up to ≤100A continuous discharge.

What protects the battery?

Five built-in protections cover over-charge, over-discharge, over-current, short-circuit, and temperature, while the LiFePO4 cells and metal shell keep operation stable from 0–45°C charging to −10–55°C discharging.

How do I check its status?

A built-in touchscreen shows real-time status at a glance, so you can monitor charge, discharge, and health without additional software or tools.

Expert Support

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We typically respond to all inquiries within 24 hours during business days.

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