5 kWh lithium batteries for 48 V systems
Wall-mounted, rack-mount and stackable LiFePO4 batteries at 51.2 V 100 Ah (5.12 kWh), plus the 6.14 kWh AU51120. All work with 48 V hybrid and off-grid inverters, and more units can be added later.
Every 5 kWh model side by side
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| Model | Energy | Installation | Size (mm) | IP | Max. current | Cycles* | Extras | Documents |
|---|---|---|---|---|---|---|---|---|
| KNY 51100 | 5.12 kWh 100 Ah | Wall-mounted | 600 × 480 × 189 | IP65 | 100 A | 6,000 | — | CE · MSDS · UN38.3 |
| ES-LV-5 | 5.12 kWh 100 Ah | Wall-mounted | 640 × 380 × 160 | IP20 | 100 A | 6,000 | Touch screen, Bluetooth + WiFi | CE · MSDS · UN38.3 · IEC 62619 |
| ZC-L 51100 | 5.12 kWh 100 Ah | Rack mount | 500 × 484 × 178 | IP20 | 100 A | 6,000 | Also as ZC-L 48100: 48 V, 4.8 kWh | Ask us |
| ZC-S 51100 | 5.12 kWh 100 Ah | Stacked under KNY5000 inverter | 440 × 600 × 500 (with 1 module) | IP20 | 100 A / module | 6,000 | Matching 5 kW hybrid inverter; up to 4 modules | CE · MSDS · UN38.3 |
| AU51120 | 6.14 kWh 120 Ah | Wall-mounted | 600 × 480 × 200 | IP65 | 100 A | 6,000 | Built-in breaker; heating optional | MSDS · UN38.3 |
* Cycle life at 80% depth of discharge (25 °C where stated). All 51.2 V models use CAN and RS485 to talk to the inverter. Data from the 2026 product catalogue; we confirm the current datasheet with every quotation. “Ask us” means the catalogue does not state it.
Who a 5 kWh battery suits
A 5 kWh battery is the entry point for home storage. It carries essential loads such as lights, Wi-Fi, a TV and a fridge through an evening or a typical power cut, and suits small homes, shops and starter solar systems.
Every model on this page runs in parallel, so a 5 kWh unit is also a building block: start with one and add a second for 10 kWh when the budget allows. ZC-S modules stack under their own 5 kW inverter, up to 20.48 kWh.
How long does 5.12 kWh last?
| Average load | Example | About |
|---|---|---|
| 300 W | Fridge, lights, Wi-Fi and TV | 13.7 hours |
| 1,000 W | An example evening load at home | 4.1 hours |
| 2,000 W | With one air conditioner or a water pump | 2.0 hours |
A rough guide: 4.1 kWh used (80% of 5.12 kWh), before inverter losses. Real runtime depends on the inverter, the loads and the temperature.
Full specifications for each series
KNY 51 series
Four capacities in one family: a 5 kWh wall unit and 10, 15 and 16 kWh floor units, all IP65.
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ES-LV PLUS series
European-style cabinets for wall or floor, with touch screen, Bluetooth and WiFi. Listed with IEC 62619.
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ZC-L 51100 / 48100
100 Ah rack modules in 51.2 V or 48 V, for standard battery racks and cabinets.
View specifications →
ZC-S 51100 + KNY5000
Inverter on top, battery modules below. Add 5.12 kWh at a time as the household grows.
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AU51120
Slim 51.2 V LiFePO4 pack for indoor or outdoor walls, with a built-in breaker and status display.
View specifications →5 kWh batteries: common questions
48 V or 51.2 V? A LiFePO4 cell is 3.2 V. Sixteen in series make 51.2 V, which is what most “48 V” lithium batteries are. They charge to 58.4 V at most and cut off at 44 V, which suits 48 V hybrid and off-grid inverters that support lithium batteries.
How many kWh is a 51.2 V 100 Ah battery?
51.2 V × 100 Ah = 5,120 Wh, or 5.12 kWh. At 80% depth of discharge, about 4.1 kWh is used in each cycle.
Is a 51.2 V battery the same as a 48 V battery?
In practice, yes. A LiFePO4 cell is 3.2 V, so 16 cells in series give 51.2 V. That is what most batteries sold as "48 V lithium" are, and they work with 48 V hybrid and off-grid inverters that support lithium batteries. If your system needs a true 48 V pack, ZC-L 48100 uses 15 cells (48 V, 4.8 kWh).
Will it work with my inverter?
Our 51.2 V batteries talk to inverters over CAN and RS485, and most models also have RS232. Send us the inverter brand and model and we check the communication protocol before you order.
Can I add more batteries later?
Yes. KNY 51100, ES-LV-5, ZC-L 51100 and AU51120 run up to 15 units in parallel. ZC-S modules stack up to four under one KNY5000 inverter, for 20.48 kWh.
Which documents come with it?
The documents listed for each model are in the table above: CE, MSDS and UN38.3 on most models, and IEC 62619 on ES-LV-5 as well. We send the current datasheet and certificates with every quotation.
How are the batteries shipped?
LiFePO4 batteries travel as Class 9 dangerous goods, with the UN38.3 test summary and MSDS. We ship by sea from China to your port, from sample orders to full containers.
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