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51.2V 20KWH Lithium Stacked Battery

51.2V 20KWH Lithium Stacked Battery

The 51.2V 20kWh LiFePO4 Stacked Battery is a high-capacity, modular energy storage solution designed for large-scale residential, commercial, or off-grid solar systems, combining scalable power with space efficiency. Built on lithium iron phosphate (LiFePO4) chemistry and a stackable design, it delivers robust energy storage to support extended off-grid use, backup power, and optimized solar self-consumption—ideal for users needing significant capacity without sacrificing space.

Product Introduction
Products Description

5-30KWH Stacked Lithium Batteries

 

 

High Capacity & Stackable Design:

Energy Output: Operates at 51.2V nominal voltage with a total capacity of 20kWh (equivalent to two 51.2V 200AH units stacked), delivering enough power to run a medium-sized home's essentials (HVAC, refrigeration, lighting, and small appliances) for 24–48 hours, or support commercial equipment (servers, POS systems) during prolonged outages.

Modular Stacking: Each 10.24kWh module (51.2V 200AH) measures ~45cm × 30cm × 20cm and weighs ~50kg, with interlocking brackets and standardized connections for secure vertical or horizontal stacking. Systems can scale from 20kWh (2 modules) up to 120kWh (12 modules) by adding units, making them suitable for growing energy needs (e.g., expanding a solar setup or powering a small business).

 

 

LiFePO4 Durability for Heavy Cycles:

Extended Lifespan: 3000–6000 deep cycles (at 80% depth of discharge) with ≥80% capacity retention after 10+ years-outlasting lead-acid batteries by 5–10x. This longevity aligns with solar panel lifespans (25–30 years), ensuring minimal replacement costs over the system's lifetime.

Temperature Resilience: Performs reliably in extreme temperatures (-20°C to 60°C), maintaining efficiency in hot climates (where solar generation peaks) or cold regions (where traditional batteries lose capacity).

 

 

Advanced Safety & Synchronized Management:

Centralized BMS for Stacks: A master Battery Management System (BMS) coordinates all stacked modules, balancing charge/discharge across units to prevent uneven wear. It monitors voltage, current, and temperature in real time, protecting against overcharging, over-discharging, short circuits, and thermal runaway-critical for multi-module safety.

Fire-Resistant Construction: LiFePO4 chemistry is non-flammable, and modules feature flame-retardant casings (UL94 V-0 rated). Ventilation channels between stacked units dissipate heat, keeping temperatures stable even during high discharge.

 

 

Model 48100 48200
Specification 48V100Ah 51.2V100Ah 48V200Ah 51.2V200Ah
Combination 15S1P 16S1P 15S1P 16S1P
Capacity 4.8KWh 5.12KWh 9.6KWh 10.24KWh
Standard discharge current 50A 50A 50A 50A
Max. discharge current 100A 100A 100A 100A
Working voltage range 40.5 - 54VDC 43.2 - 57.6VDC 40.5 - 54VDC 43.2 - 57.6VDC
Standard Voltage 48VDC 51.2VDC 48VDC 51.2VDC
Max. charging current 50A 50A 100A 100A
Max. charging voltage 54V 57.6V 54V 57.6V
Cycle 3000 - 6000cycles @ DOD 80%/25°C/0.5C
Working humidity 65±20%RH
Operating temperature -10 - +50°C
Working altitude ≤2500m
Cooling method Natural cooling
Installation Stack installation
Protection level IP20
Max of parallel 15PCS
Warranty 5 - 10 Years
Communication Default: RS485/RS232/CAN Optional: WiFi/4G/Bluetooth
Certified CE ROHS FCC UN38.3 MSDS
Product Size 400*200*460mm 400*240*460mm
Package Size 460*230*545mm 460*270*545mm
Net weight 50kg 53kg 102kg 106kg
Gross weight 55kg 58kg 112kg 116kg

 

 

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FAQ

 

 

What is the total energy capacity of a 51.2V 100Ah battery?

A 51.2V 100Ah battery provides 5.12 kWh of nominal energy. It is the most popular size for residential solar energy storage and backup power systems.

 

 

How many 5.12kWh modules can be connected in parallel?

Our 51.2V 100Ah system supports parallel connection of up to 15 or 16 units, allowing you to scale your total capacity up to 80kWh without needing an external controller.

 

 

Is the 51.2V 100Ah battery compatible with 48V solar inverters?

Yes. While the nominal voltage is 51.2V (standard for 16-cell LiFePO4), it is fully compatible with most 48V off-grid and hybrid inverters like Victron, Growatt, and Deye.

 

 

What is the best application for a 100Ah lithium battery?

The 100Ah model is ideal for small-to-medium home solar systems, telecom base stations, and as an emergency UPS for critical office equipment.

 

 

What is the maximum discharge current for the 100Ah model?

Typically, it supports a continuous discharge of 100A (1C rate), allowing it to power appliances up to 5kW instantly.

 

 

 

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