SUNWAY 5-15kWh Stackable Home ESS

Description :

The FS5KS5121 is a highly versatile 5KVA solar energy storage inverter designed for floor-mounted indoor installations. This system efficiently combines a 5000W rated AC output with a robust 6000W maximum PV input, allowing users to safely maximize their solar generation. Engineered with a built-in 80A solar charger and a wide MPPT operation range of 120-500V, it ensures optimal energy harvesting throughout the day. The system features a modular, stackable battery architecture utilizing reliable LFP cells, enabling scalable energy storage from 5.12kWh up to 15.36kWh across one to three modules. With capabilities for grid feed-in and seamless WiFi monitoring, it serves as a powerful, centralized hub for modern residential power management.

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Product Description:

5-15kWh Stackable Home ESS Specification document

Product Advantages and Features

Flexible Capacity Scaling:
The stackable battery design allows users to seamlessly expand their system energy using 1 to 3 LFP modules, easily scaling the total capacity from 5120Wh up to 15360Wh.

High-Yield Solar Harvesting:
Supports a maximum PV input power of 6000W and operates efficiently across a wide MPPT voltage range of 120-500V, maximizing daily energy capture.

Reliable Emergency Backup:
Delivers a continuous rated output power of 5000W with a peak emergency output of 10000VA, ensuring load stability with a rapid transfer time of <10ms during outages.

Advanced Battery Integration:
Features a dedicated lithium battery activation function and utilizes durable LFP cells that deliver an exceptional lifespan of ≥6000 cycles.

Smart Connectivity & Control:
Comes equipped with built-in WiFi monitoring, allowing users to track real-time system performance via an LCD or mobile APP, while supporting standard CAN and RS485 communication protocols.

Optimized Energy Distribution:
Features dual AC output for prioritized load management and natively supports grid feed-in, enabling users to export excess power for regional utility benefits.

Product Information Sheet

Model	FS5KS5121	FS5KS5122	FS5KS5123
	1 Battery Module	2 Battery Module	3 Battery Module
PV Input
Rated Voltage (V)	350-360
MPPT Voltage Operation Range (V)	120-500
Max Input Power (W)	6000
Max Input Voltage (V)	500
Max Input Current (A)	18
AC Input & Output (Grid)
Max AC Input Current (A)	40
Rated Output Power (W)	5000
Max Output Power(VA)	5000
Rated Output Current (A)	21.7
Max Output Current (A)	23.9
Rated Output Voltage (V)	220/230/240
THDI	<3% (Nominal Power)
Emergency Output
Max Output Power (VA)	5000
Peak Output Power (VA)	10000
Max Output Current (A)	16-26.1
Rated Output Voltage (V)	220/230/240(+/-0.2%)
Output Frequency (Hz)	50/60(+/-0.2%)
THDU	<2%
Transfer Time(ms)	<10
Efficiency
Max Battery Discharge Efficiency	91%
Max Charge Efficiency (PV to battery)@Full load	98.50%
System Parameter
Dimensions (WDH)	674170775mm	6741701135mm	6741701535mm
Work Temperature Rang(℃)	-20~+60 (Derating @45 ℃)
Storage Temperature(℃)	-20~+45
Storage RH(%)1	5%~90% (non-condensing)
Altitude (m)	<2000
Ingress Protection	IP21
Dispaly	LCD/APP
Cooling Method	Natural cooling
Inverter Topology	Non-isolated
Installation	Floor-mount
Battery Pack Specification
Cell Type	LFP
Cell Configuration	16S1P
Nominal Voltage (V)	51.2
Nominal Capa ity (Ah)	100
Nominal Energy / Module (Wh)	5120
System Energy (Wh)	5120(1 Module)	10240(2 Modules)	15360(3 Modules)
Charge Voltage (V)	58
Max Charging Current (A)	100
Max Discharging Current (A)	100
Charge Temperature Range (°C)	0~45
Discharge Temperature Range (°C)	-20~60
Storage Temperature Range (C)	-20~45
Humidity (%)	5~95%RH
Cooling Method	Natural cooling
Cycle Life (Time)	≥6000(80% DOD, Remaining 80%)
Communication	CAN & RS485
Weight (kg)	55