Stackable All-in-One ESS 3.6kWh +6kWh with wide grid input Energy Storage System
Meet the RSN Stacked Series by RSUN, a sleek, modular home energy storage solution designed to save space and maximize solar efficiency. Offering 3kW or 5kW output and expandable storage up to 15.36kWh, it keeps your home powered day and night with safe, long-lasting LiFePO₄ batteries.
With built-in WiFi and Bluetooth, you can easily track performance and control the system from anywhere. Simple to install, elegantly designed, and built for independence, the RSN Series brings smart, reliable power to today’s energy-conscious homes.
FEATURES:
PRODUCT OVERVIEW:

SPECIFICATIONS:
| Model | RSN 1.2kWh+4kWh | RSN 3.6kWh+8kWh | RSN 6kWh+10kWh | RSN 11kWh+16kWh |
| AC Input | ||||
| Rated Input Voltage | 208/220/230/240 VAC | |||
| Input Voltage Range | 170~280VAC(For PC);90~280VAC(For Home Appliances) | |||
| Frequency Range | 50/60Hz(Auto Sensing) | |||
| AC Charging Current Range | 2-60A | 2-100A | 2-80A | 2-120A |
| Max. Input Current | 10A | 20A | 26A | 50A |
| PV Input | ||||
| Solar Charging Type | MPPT | |||
| PV Max. Input Power | 1KW | 4KW | 5.5KW | 5.5KW*2 |
| MPPT Tracking Voltage Range | 120-430 VDC | |||
| Max. PV Input Voltage | 450 VDC | |||
| PV Charging Current Range | 100A | 0~80A | ||
| Max. Charging Current | 60A | 100A | 80A | 160A |
| Output | ||||
| Rated Output Voltage | 1.2kW | 3.6kW | 6.0kW | 11kW |
| Output Voltage Range | (220V~240V)±5% | |||
| Frequency | 50/60Hz±0.1% | |||
| Max. Output Current | 22.7A | |||
| Peak Power | 2400W | 7200W | 12000W | 11000W*2 |
| Overload Capacity Product Description (Battery Mode) | 1min@102%~110% Load ; 10s@110%~130%Load; 3s@130%~150% Load ;200ms@>150% Load | |||
| Peak Efficiency | >94% battery mode >99% line mode | |||
| Transfer Time | Max. 10ms | |||
| Battery | ||||
| Battery Voltage | 12.8VDC | 25.6VDC | 51.2vdc | 51.2vdc |
| Battery Energy | 4.02kWh | 8.04kWh | 10.24kWh | 16.08kWh |
| Cell technology | LiFePO4 | |||
| DOD | 80% | |||
| Product General Data | ||||
| Designed Life-span cycle | 6000 | |||
| Communication Interface | RS232, RS485, CAN(Standard),SNMP/Wifi/Bluetooth(Optional) | |||
| Display | LCD&LED | |||
| Parallel Interface | RS485/CAN/RS232/SNMP/WIFI/Bluetooth | |||
| Operation Environment Temperature | 0~40℃ | |||
| Environment Humidity | -15~60℃ | |||
| Operation Altitude | <3000m | |||
| Cooling Mode | Active Cooling | |||
| Noise Emission | <50db | |||
FAQ:
Q1: Can I try a sample first?
A: Definitely! Single units or mixed models are welcome.
Q2: How soon will my order arrive?
A: Samples: 5 - 7 days. Bulk orders: about 3 - 4 weeks.
Q3: What’s the minimum order?
A: Just 1 unit, perfect for testing or small projects.
Q4: How do you ship?
A: By express courier or sea freight; timing depends on your region.
Q5: How do I place an order?
A: Share your needs, get a quote, confirm the order, and production starts.
Q6: Can I add my branding?
A: Yes, full OEM customization is supported.
Q7: What warranty comes with the UPS?
A: 5–10 years depending on the model and your agreement.