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SunWell Energy

20.48kWh 6kW APOLLO B Stackable All-in-One ESS

20.48kWh 6kW APOLLO B Stackable All-in-One ESS

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Model

One cabinet holds inverter, charge controller and a twenty point four eight kilowatt hour battery, giving a home six kilowatt backup that switches on the moment the grid drops. An twenty point four eight kilowatt hour battery and a six kilowatt inverter share one compact cabinet, so the APOLLO B brings two hundred thirty volt backup and self-use solar to a home without a rack or combiner.

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20.48kWh 6kW APOLLO B Stackable All-in-One ESS — Technical Specifications
MODELSW-B-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 Current120A
Communication InterfaceUSB（Inverter） / RS485（BMS）
Dimension60×18.3×36.5cm
AC Input
Nominal Voltage230Vac
Voltage Range90-280Vac
Rated Frequency50/60Hz
Frequency Range40-70Hz
Rated Current60A
Max. AC Current120A
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 Current120A
Max. Discharging Current120A
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
Dimension60×18.3×39cm

Features

  • Home sized The twenty point four eight kilowatt hour six kilowatt cabinet suits a house, sized for the realistic load of a family, not a commercial plant.
  • True sine Delicate electronics ride the six kilowatt clean stage at two hundred thirty volt; TVs and routers draw stable power through the switchover.
  • Expandable The twenty point four eight kilowatt hour bank grows one six kilowatt block at a time; each addition is a simple plug, never a rewire.
  • Balanced cells A BMS keeps the twenty point four eight kilowatt hour pack even; balanced cells mean the full rated capacity stays usable, year after year.
  • Daily build The LiFePO4 pack is rated for constant cycling; it is built to charge every noon and discharge every night.
  • Input tolerant Shaky supply is handled by the charge stage; the inverter keeps a steady two hundred thirty volt even when the wall feed wanders.

Applications

  • Workshop & tools: Power tools and machinery pull a steady two hundred thirty volt wave from the six kilowatt stage, with no flicker on motor start.
  • Small business: Tills, routers and lighting stay up on the six kilowatt supply, so a shop keeps trading through a blackout.
  • Off-grid cabin: Far from the nearest line, the LiFePO4 pack and inverter run a cabin through nightly cycles, fed by panels or a small generator.
  • Annex & outbuilding: A shed, studio or guest wing shares the main bank, so outbuildings stay powered without a separate box.
  • Cold storage: During an outage the twenty point four eight kilowatt hour bank keeps freezers and fridges cold, protecting perishable stock.
  • Security & lighting: Cameras, gates and outdoor lamps draw from the bank during a cut, so security never blinks offline.

Energy Management & System Architecture

Everything closes inside one cabinet face: the six kilowatt inverter, the charge controller and the twenty point four eight kilowatt hour LiFePO4 bank, all logged by the BMS. Inverter, MPPT and the twenty point four eight kilowatt hour LiFePO4 cells sit on one short BMS bus inside a narrow cabinet, so there is no rack to assemble or combiner to wire.

It loads at noon and discharges after sunset at two hundred thirty volt; in a blackout the six kilowatt stage reclaims the home fast while the BMS nurses each cell. While the sun shines it tops the bank at two hundred thirty volt; the moment the grid wavers the six kilowatt stage carries the load and the BMS fences off any weak cell.

Grid, Backup & System Integration

Transfer is clean and quick, so an outage barely registers for the six kilowatt load drawn from the twenty point four eight kilowatt hour cells at two hundred thirty volt. The unit rides the grid and falls into island mode on its own, the six kilowatt inverter rebuilding a stable two hundred thirty volt wave from the twenty point four eight kilowatt hour pack.

Because inverter and battery share one cabinet, the house tie is a single breaker - reserve grows by standing a second cabinet next to the first, not rewiring the wall. A generator input is built in: if solar and grid both run short, the inlet takes a genset to recharge while the BMS keeps watch.

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 add capacity?

Place another six kilowatt block beside it; the BMS adopts it and raises the twenty point four eight kilowatt hour reserve.

What does it output?

A clean two hundred thirty volt sine wave for home loads.

How long will the twenty point four eight kilowatt hour pack last?

Thousands of cycles of everyday use.

Safe in a living space?

Yes. The BMS isolates faults; site it where air moves.

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.