Outdoor Cabinet ESS 20kW 40kWh

SW-20Kw40kWh is a 20 kW / 40 kWh outdoor energy storage cabinet with air-cooled design, up to 30 kW of PV input, and fast on/off-grid switching — ready for C&I storage, PV+ESS+charging, and microgrid applications.

Rated Output Power	20 kW
Rated Energy	40 kWh
Max. PV Input Power	30 kWp
IP Rating	IP54

SW-20kW40kWh is an outdoor, PV-ready energy storage cabinet designed for commercial and industrial applications, microgrids, and PV+ESS+charging scenarios. It combines a 20 kW rated AC output with a 40 kWh LFP battery bank (100 Ah cells, 1P128S, 409 V), supports 0.5C charge/discharge, and accepts up to 30 kW of PV input through 2 MPPT channels (200–960 V). Flexible on-grid and off-grid operation with under 20 ms switching keeps critical loads powered through grid disturbances.

The cabinet is built for outdoor deployment and low-maintenance operation: air-cooled thermal management, IP54 protection, aerosol fire suppression, and intelligent dehumidification protect the system in demanding environments, while support for unbalanced three-phase loads and parallel units extends flexibility as energy needs grow. Remote cloud EMS enables monitoring, upgrades, and cloud operations over RS485/Ethernet with Modbus — making SW-20kW40kWh a complete, scalable solution for distributed energy storage.

Model	SW-20kW40kWh
Battery Parameters
Charge/Discharge Rate	0.5C
Rated Cell Capacity [Ah]	100
Rated Voltage [V]	409
Operating Voltage Range [V]	358~467
Rated Energy [kWh]	40
Configuration	1P128S
AC Parameters (On-Grid)
Rated Output Power [kW]	20
Rated Output Current [A]	29
Max Output Power [kVA]	22
Max Output Current [A]	32
Rated Grid Voltage [V]	3W/N/PE, 220/380, 230/400
Rated Grid Frequency [Hz]	50
Power Factor	1(0.9 leading~0.9 lagging)
THDi	≤3% (@ Rated power)
AC Parameters (Off-Grid)
Rated Output Power [kW]	20
Rated Output Current [A]	29
Rated Output Voltage [V]	3W/N/PE, 220/380, 230/400
Rated Output Frequency [Hz]	50
Switching Time [ms]	<20
PV Parameters
Max. PV Input Power [kWp]	30
Max. PV Input Voltage [V]	1000
No. of MPPTs / Max. Strings per MPPT	2/2
Operating Voltage Range [V]	200~960
Max. PV Input Current [A]	2*25
Max. PV Short-Circuit Current [A]	2*30
General Parameters
IP Rating	IP54
Cooling Method	Air Cooling
Fire Protection System	Aerosol
Relative Humidity	0~95%, Non-condensing
Operating Temperature Range [°C]	-20~+50
Max Altitude [m]	4000 (>2000 Derating required)
Communication Method	RS485, Ethernet
Communication Protocol	Modbus
Weight [kg]	≈1000
Dimensions(WDH)[mm]	139510001800

ABOUT SUNWAY

Sunway Solar, established in 2016, is a pioneering photovoltaic technology trading company offering a comprehensive range of solar products (panels, inverters, batteries, mounting systems) and one-stop energy storage power solutions. Certified with CE, TUV, RoHS, and UL, we professionally design systems from 300W to 1MW, provide on-site installation guidance by engineers, and ensure fast delivery with high-quality after-sales support through our 2024-established European branch with a warehouse in the Netherlands, covering markets across the Americas, Europe, Middle East, Africa, and Southeast Asia.