Description

The Dyness S51100 is a 5.12 kWh (51.2 V, 100 Ah) LiFePO4 battery module from which the STACK100 storage system is built. The module contains 16 cells of 3.2 V / 100 Ah; it sits on the controller (BDU) or on another module and adds 5.12 kWh of capacity (4.86 kWh usable), 51.2 V of voltage and 2.56 kW of recommended power (up to 5.12 kW at 1C) to the cluster. You buy this module when you want to expand an already operating STACK100 tower or build its second column.

How expansion works

A cluster can hold 3–15 modules, and the manufacturer recommends no more than 12 in a single column; from 13 modules the second column is built on the expansion base with cover (kit C). Only identical S51100 modules may be added, and the manufacturer allows expansion no later than 3 years after commissioning (recommends within 2); the production dates of new and existing modules may differ by no more than 3 years. Before connection the charge levels are equalised: the existing tower is discharged to the new module's factory level (30 or 50%) or the new module is charged with a DC charger (57.6 V, 50 A). After expansion 5 full cycles are recommended; expansion without these conditions may void the warranty.

What an extra module changes

Each module raises the cluster's voltage window by about 45–58 V, so the new module count must fit within the inverter's battery voltage limits and be marked in the Dyness compatibility list: the Solis S6-EH3P(3-10)K-H is listed up to the 10S, the Deye SUN-5K~25K up to the 12S, and from the 13S mostly commercial models remain. Before you order a module we check whether your inverter accepts the larger configuration.

Dimensions and installation

The module measures 590 × 390 × 133.5 mm and weighs 47 kg – the tower grows by 133.5 mm with every module, and two people are needed to lift it. The connectors are composite, with no cables; the box (package B) contains the module and four M5 × 30 screws. IP20 – indoor only; ambient temperature 0–50 °C, built-in fan cooling, with 300 mm left on the fan side to the next tower.

Safety and warranty

A separate aerosol fire extinguisher in every module, more than 8,000 cycles (0.2C, 25 °C, 95% DOD), transport under UN38.3. Warranty – as part of the STACK100 system: 10 years in Europe with an active inverter connection, 3 years without it.

Technical specifications

Capacity

5.12 kWh (4.86 kWh usable, 95% DOD)

Voltage

51.2 V, 100 Ah (16 cells of 3.2 V); adds 51.2 V to the cluster voltage

Power

2.56 kW recommended (0.5C), up to 5.12 kW (1C)

Current

50 A recommended, max 100 A, peak 125 A (2 min)

Charge cycles

≥ 8,000 (0.2C, 25 °C, 95% DOD)

Dimensions (W×D×H)

590 × 390 × 133.5 mm

Weight

47 kg

Protection

IP20 (indoor only), aerosol extinguisher in the module

Compatibility

Only STACK100 with SBDU100 controller; 3–15 modules per cluster, up to 12 per column recommended

In the box

S51100 module, 4 M5 × 30 screws

Warranty

10 yr. as part of the STACK100 system (EU terms; 3 yr. without BMS link)