1 1

SunWell Energy

20.48kWh 12kW APOLLO A Stackable All-in-One ESS

20.48kWh 12kW APOLLO A Stackable All-in-One ESS

Get a Quote Contact Us
Model

Designed for whole-home resilience, the twenty point four eight kilowatt hour twelve kilowatt APOLLO A folds inverter, charge controller and battery into a single stackable block for buildings. Linkable from day one, the twelve kilowatt twenty point four eight kilowatt hour APOLLO A starts as a single tile and accepts neighbours until the home is fully covered.

View full details
20.48kWh 12kW APOLLO A Stackable All-in-One ESS — Technical Specifications
MODELSW-A-51.2-400
Inverter
Rated Power6kW
AC Rated Voltage230Vac
Rated Frequency50/60Hz
Efficiency≥98%
Transfer Time10ms
WaveformPure Sine Wave
Battery Overvoltage58.4V
Battery Undervoltage Alarm45V
Constant Voltage Charge58.4V
Float Voltage56V
Max. Charging Current100A
Communication InterfaceUSB（Inverter) / RS485（BMS）
Dimension60×40.5×18cm
AC Input
Nominal Voltage230Vac
Voltage Range90-280Vac
Rated Frequency50/60Hz
Frequency Range40-70Hz
Rated Current60A
Max. AC Current100A
PV Input
Max. Voltage500V
Optimum Voltage300-400V
Voltage Range80V-500Vdc
Max. Power27A/9000W
Battery
Rated Capacity20480Wh(400Ah)
Nominal Voltage51.2V
Discharge Voltage Range43.2V-58.4V
Standard Charing Current50A
Max. Charging Current100A
Max. Discharging Current100A
Depth of Discharge95%
Communication InterfaceCAN/RS485
Cycle Life≥6000, 25±2°C, 0.5C, EOL80%
Working Temperature RangeCharge: 0°C-50°C; Discharge: -20°C-60°C
Storage Temperature-20°C-60°C
Dimension60×40.5×19.5cm

Features

  • Scalable rack feel Without a rack, the twelve kilowatt floor unit still stacks like one, growing the twenty point four eight kilowatt hour store room by room.
  • Stable sine Sensitive kit stays safe behind the twelve kilowatt pure-sine stage at two hundred thirty volt.
  • Safer chemistry LiFePO4 keeps the twenty point four eight kilowatt hour cells cool and long-lived under daily load.
  • Active balancing The BMS tops up weaker cells so the twenty point four eight kilowatt hour bank ages evenly.
  • Broad acceptance From a weak rural line to a campsite generator, the PV input copes.
  • Single enclosure One sealed floor cabinet holds the twelve kilowatt inverter, the BMS and the twenty point four eight kilowatt hour pack behind a single panel.

Applications

  • Annex & outbuilding: A shed, studio or guest wing shares the main bank, so outbuildings stay powered without a separate box.
  • Large residence: Stacked cabinets cover a villa or multi-room home, meeting the full twenty point four eight kilowatt hour demand from one tidy row.
  • Workshop & tools: A pure-sine twelve kilowatt feed starts saws and pumps cleanly, so the workshop runs as if wired to the grid.
  • Small business: Card readers, routers and display lights draw from the twelve kilowatt output, so trading never pauses for an outage.
  • Off-grid cabin: With no mains nearby, the battery and inverter keep a remote cabin lit and working through every nightly cycle.
  • Cold storage: Frozen and chilled goods stay safe on battery through a blackout, with the twenty point four eight kilowatt hour pack holding the cold.

Energy Management & System Architecture

Every twelve kilowatt cabinet carries its own inverter and a slice of the twenty point four eight kilowatt hour LiFePO4 pack, yet the BMS treats the stack as one battery with one state of charge. The BMS is the brain: it matches the twelve kilowatt inverter to the twenty point four eight kilowatt hour cells, capping current and heat so the pack ages evenly across a long service life.

Day to day it converts panel power to two hundred thirty volt at high efficiency and refills the bank; in an outage the twelve kilowatt stage takes over fast and the BMS holds the line. Grid-tied, surplus solar fills the bank at two hundred thirty volt; off-grid, the twelve kilowatt output runs the home while the BMS fences off any weak cell.

Grid, Backup & System Integration

Transfer is automatic and fast, so a outage becomes a non-event for the twelve kilowatt load fed from the twenty point four eight kilowatt hour cells. Backup is seamless: the twelve kilowatt inverter detects a grid loss and moves the load to the twenty point four eight kilowatt hour battery in a few milliseconds, so lights and routers never blink.

Because inverter and battery share a cabine, the two hundred thirty volt connection to the house is a single breaker — installers add capacity by stacking, not rewiring. Integration stays simple — one AC port to the home and one PV port to the array — yet the BMS still coordinates charge, discharge and protection across the two hundred thirty volt system.

Warranty

We provide a 5-year warranty on the battery and a 2-year warranty on the inverter of this product. If you experience any quality issues within the warranty period, please contact us and we will arrange a replacement or repair promptly.

Frequently Asked Questions

How do I grow capacity?

Add another twelve kilowatt block; the BMS adopts it and lifts the twenty point four eight kilowatt hour total.

Does it lower my bill?

Yes. It stores midday solar and discharges through the costly evening peak.

What runs during a blackout?

The twelve kilowatt stage keeps two hundred thirty volt essentials alive for hours.

Is the chemistry safe?

LiFePO4 is cobalt-free and stable; the BMS adds cell-level protection.

Expert Support

Our team of solar energy experts is ready to help you find the perfect solution for your needs.

Fast Response

We typically respond to all inquiries within 24 hours during business days.

Custom Solutions

Every project is unique. Let us design a solar solution tailored to your specific requirements.