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SunWell Energy

20.48kWh Stackable All-in-One ESS

20.48kWh Stackable All-in-One ESS

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Built as an all-in-one LiFePO4 system, the 20.48kWh Stackable All-in-One ESS brings dependable storage to homes and small businesses needing backup and solar self-use. Its cells are rated for 6000 deep cycles, so the pack keeps delivering through years of daily charge and discharge. Its IP65 rating and operating range from -20°C to 50°C let it run reliably in dusty, humid or temperature-swing sites.

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20.48kWh Stackable All-in-One ESS — Technical Specifications
MODELSW-ESS6-10LV2
PV Specifications
Max. PV Input Power11000W
Nominal DC Voltage/ Voc360Vdc/600Voc
Start-Up/ Min.Operation Voltage50Vdc/40Vdc
No. Of Mppts/ Strings2/1
Max. PV Input/ Short Circuit Current16A/20A
Input/ Output (AC)
Max. AC Input Power From Grid11000VA
Rated/ Max. AC Output Power6000W/6000VA
Rated AC Output Current (At 230V)26.1A
Max. AC Output Current27.3A
Rated AC Voltage220V/230V/240V
AC Voltage Range154V~276V
Rated Grid Frequency50Hz/60Hz
Grid Frequency Range45~55Hz/55~65Hz
Harmonic (THD)< 3%
Power Factor At Rated Power> 0.99
Adjustable Power Factor0.8 leading...0.8 lagging...
Grid TypeSingle phase
Rated Output Power For Backup Load5000W
Frequency Range In Off Grid Mode50Hz/60Hz (±0.5%)
Battery Data
Rated Voltage51.2Vdc
Cycle Life25±2°C, 0.5C/0.5C, EOL70%≥6000
Charge Voltage57.6Vdc
Max. Charge/Discharge Current100A
Discharge Cut-Off Voltage43.2Vdc
Charge Cut-Off Voltage58.4Vdc
Cell Combination16S2P*2
Rated Capacity400Ah
Energy Storage20.48kWh
Environment
Charge Temperature0°C to 50°C @ 60 ± 25% Relative Humidity
Discharge Temperature-20°C to 50°C @ 60 ± 25% Relative Humidity
Storage Temperature-20°C to 50°C @ 60 ± 25% Relative Humidity
Mechanical
IP ClassIP65
Material SystemLiFePO4
Case MaterialMetal
Case TypeAll in One Stack
Product Dimension(L×W×H)620×212×1900mm
Package Dimension(L×W×H)760×725×345mm + 735×715×340mm ×2
Net Weight25kg + 85kg×2
Gross Weight30kg + 92kg×2
Communication
Protocol (Optional)RS485/RS232/WLAN Optional
Certificates
Certificates (System)UN38.3, MSDS, EN, IEC, NRS, G99
Certificates (Cell)UN38.3, MSDS, IEC62619, CE, UL1973, UL2054

Features

  • All-in-one architecture integrates battery, inverter and management. The 20.48kWh combines storage, a hybrid inverter and MPPT in one enclosure, cutting installer time and wiring.
  • Built-in inverter and MPPT handle solar, grid and backup. It harvests PV, powers loads and switches to battery backup within moments of an outage, with no manual action.
  • Intelligent EMS optimizes self-consumption and savings. The system routes power between solar, battery, grid and load in real time, enabling time-of-use scheduling and peak shaving.
  • Real-time monitoring keeps status visible. Through the unit display communication you can check state-of-charge, power flow and faults on site or remotely.
  • Safe LiFePO4 chemistry with multi-layer protection. Inherently stable cells plus system safeguards monitor over-voltage, over-current and temperature during daily operation.
  • Scalable storage expands as demand grows. Add battery modules or parallel units to increase capacity, protecting your initial investment as needs rise.

Applications

  • Home Blackout Backup: In off-grid mode it backs loads up to 5000W, keeping lights, internet, and fridges running through outages.
  • Rooftop Solar Self-Consumption: The 11000W MPPT stores daytime PV in the 20.48kWh pack for evening use, raising on-site solar share.
  • Evening Peak Shaving: Discharges after sunset to trim high-tariff grid draw, covering heavier single-phase loads than the 10.24kWh model.
  • Off-Grid Cabin or Remote Home: Runs independently as the core of a small solar power system away from the grid.
  • Larger Household or Small Office: A 6000W output with double capacity fits residences with higher evening demand.
  • Scalable Home Storage: The optional battery stack lets owners grow beyond the two shipped 10.24kWh modules.

Energy Management & System Architecture

The SW-ESS6-10LV2 is a 20.48kWh single-phase all-in-one ESS that integrates a 6000W inverter, PV MPPT, and a 51.2Vdc LiFePO4 battery in one stackable cabinet. Its MPPT accepts up to 11000W of PV across 40–600Vdc, converting rooftop solar into stored energy or immediate AC load.

The 16S2P×2 pack (400Ah) is managed by the system BMS and rated for 6000 cycles at 70% SOH, with a 100A max charge/discharge path and charge voltage of 57.6V. The inverter outputs 6000W (6000VA) at 220/230/240V, 50/60Hz, THDi below 3%, and RS485/RS232 with optional WLAN feed status to home energy management for coordinated charging and load control.

Grid, Backup & System Integration

The unit runs grid-connected or off-grid, supplying backed loads at up to 5000W during outages and holding 50/60Hz (±0.5%) in island mode. It maximizes solar self-consumption and peak shaving—storing midday PV and discharging in the evening—while an adjustable 0.8 leading-to-lagging power factor supports the grid.

Capacity scales through the optional battery stack (the 10LV1 starts with a 10.24kWh module, the 10LV2 with two for 20.48kWh). Plug-and-play commissioning, IP65 housing, AFCI arc protection, and certifications including UN38.3, IEC62619, CE, UL1973 and UL2054 simplify safe residential integration.

Warranty

LiFePO4 batteries for 5 years, hybrid inverters for 2 years, and solar panels under the supplier policy of a 10-year product warranty plus 30-year linear power warranty. If you experience any quality issues within the applicable warranty period, please contact us and we will arrange a replacement or repair promptly.

Frequently Asked Questions

Will it power my home during a blackout?

Yes. In off-grid mode it backs loads up to 5000W at 220/230/240V, 50/60Hz (±0.5%), keeping lights, routers, and essentials running until the grid returns.

How much solar can I add?

The MPPT accepts up to 11000W PV across 40–600Vdc—about double the 6000W inverter—so a sizable array charges the 20.48kWh battery with surplus.

Can I expand storage later?

Yes. The 10LV2 already ships with two 10.24kWh modules, and the optional stack extends capacity further as usage grows. The stackable design keeps commissioning simple.

Is it safe indoors or outside?

The IP65 enclosure allows sheltered indoor or outdoor use, AFCI guards against arcs, and cells hold UN38.3, IEC62619, CE, UL1973, UL2054. Avoid charging below 0°C.

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