The SOLUNA 2.5K is a low-voltage lithium iron phosphate battery designed for reliable residential and small commercial energy storage. It provides 2.56kWh nominal capacity, 25.6V nominal voltage, 90% depth of discharge, more than 95% round-trip efficiency, and support for up to 32 battery modules in parallel. With built-in Wi-Fi, CAN and RS-485 communication, natural convection cooling, and compatibility with Voltronic inverters, it is a practical solar battery backup solution.
Battery & Electrical
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Battery Type
Lithium Iron Phosphate (LFP)
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Nominal Capacity
2.56 kWh
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Nominal Voltage
25.6 V
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Voltage Range
20 to 28.4 V
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Max Charge Current
75 A
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Discharge Current
100 A
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Depth of Discharge
90%
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Internal Resistance
<30 mΩ
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Cycle Life
≥6000 cycles
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Battery Pack Round-Trip Efficiency
>95%
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DC Disconnect
MOS / Fuse
BMS & Communication
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Power Consumption
<2 W (work), <100 mW (sleep)
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Monitoring Parameters
System voltage, system current, cell voltage, cell temperature
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Communication
CAN, Wi-Fi, RS-485
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Connectivity
Bluetooth / Wi-Fi connection
Physical & Environmental
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Height
350 mm
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Width
460 mm
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Depth
150 mm
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Weight
25 kg
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Installation
Floor-stand / Wall-mounted
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Operating Temperature
-10°C to 50°C
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Recommended Operating Temperature
15°C to 30°C
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Recommended Storage Temperature
-20°C to 60°C
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Humidity
5% to 95%
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Altitude
Max 2,000 m
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Cooling Strategy
Natural convection
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Ingress Protection
IP20
System & Certification
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Module Parallel
1 to 32 parallel
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Expandable Capacity
Up to 40.96 kWh
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Certification
TBD
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Transportation
UN38.3
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Compatible Inverters
Voltronic Inverters
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Warranty
5-year product & performance warranty
Technical Datasheet
Complete product specifications
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