Sunpura S2400 AC Home Battery – 2.4 kWh AC-Coupled Storage

Both models use the same B2400 battery series and provide similar AC-side storage, app and control functions.

The S2400 also has two MPPT inputs for compatible solar panels. The S2400 AC has no direct solar input and is designed specifically for adding AC-coupled storage to an existing solar system.

Yes. In an AC-coupled retrofit, the existing solar inverter normally remains in operation. The S2400 AC adds storage on the AC side, so the solar installation does not need to be rebuilt.

Before purchase, check meter compatibility, the metering solution, permitted connection method, available circuit and UK installation requirements.

Direct data communication with the existing solar inverter is not normally required in an AC-coupled configuration. The existing inverter continues to supply the household electrical system.

A compatible metering system measures household import and export. The S2400 AC can then charge and discharge in response to those readings. The exact configuration must be checked for your installation.

Placement, battery connection and app setup are designed to be straightforward, but the permitted UK mains connection depends on the confirmed UK product configuration and installation requirements.

Do not connect the system until those requirements have been confirmed. Work on the distribution board, current-transformer metering, fixed wiring, a dedicated circuit or any multi-phase configuration must be checked or completed by a suitably qualified electrician.

Yes. The S2400 AC can operate as AC-coupled battery storage without its own solar panels, for example with a compatible time-of-use tariff.

It can charge during lower-cost periods and supply stored energy to the home later. Available functions depend on the metering solution, operating mode, tariff data and system configuration.

The S2400 AC is available in 2.4 kWh, 4.8 kWh, 7.2 kWh and 9.6 kWh configurations. The right capacity depends mainly on evening and overnight consumption, daily solar surplus and any larger loads you intend to run.

Compatible B2400 battery modules can expand the system to a maximum of 9.6 kWh. Increasing capacity adds stored energy but does not automatically increase the Power Box output.

The S2400 AC is specified with an IP65 enclosure and may be used indoors or outdoors when the installation location meets the product requirements.

Use a stable surface, provide adequate ventilation and keep within the specified temperature range. Keep the system away from standing water, flooding, severe direct weather exposure and combustible materials.

The S2400 AC can store surplus power from an existing solar installation on the AC side and supply it to the home later, increasing self-consumption and reducing electricity drawn from the grid.

With a compatible metering system, charging and discharging can respond to current household demand. Depending on the metering solution, operating mode and configuration, the system can also support zero export or minimise export.

With a compatible time-of-use tariff, the S2400 AC can charge during lower-cost periods and supply stored energy to the home when electricity is more expensive.

Depending on the operating mode, planning may use tariff prices, household demand, available solar generation, weather data and battery state of charge. Actual savings depend on the tariff, consumption profile, available meter data and selected settings.

These figures refer to different operating modes and are not interchangeable:

• up to 800 W grid-connected AC output,
• up to 2,400 W maximum AC charging power,
• up to 2,400 W from the dedicated off-grid output,
• up to 3,600 W peak output for five seconds from the off-grid output.

The power available in a particular installation depends on the connection method, cabling, circuit protection, operating mode, approved UK configuration and local requirements.

An energy meter is not required for every basic operating mode. A compatible metering solution is required or recommended for accurate demand matching, self-consumption optimisation, zero export and certain intelligent modes.

UK meter compatibility and the approved installation method must be confirmed before purchase. Do not assume that P1, Linky/TIC or German infrared meter-reader solutions are compatible with a UK electricity meter. Distribution-board metering must be installed by a suitably qualified electrician.

The Sunpura app is used for device setup, operating modes, schedules, power limits and energy-flow monitoring.

A stable Wi-Fi connection is important for data synchronisation, remote monitoring and intelligent controls. The S2400 AC also uses Bluetooth for local device setup.

The S2400 AC can form part of a three-phase household installation, but phase allocation, separate circuits, suitable three-phase metering, firmware and required accessories must be confirmed in advance.

Do not connect multiple units to the same circuit simply to combine their output. The design must be confirmed by Sunpura technical support and a suitably qualified electrician.

During a power cut, the S2400 AC stops supplying power through its normal grid-connected output. Suitable devices can instead be powered from the dedicated off-grid output.

Depending on the configuration, the off-grid output provides up to 2,400 W and up to 3,600 W for five seconds. Runtime and suitable loads depend on battery capacity, state of charge and the power required by connected devices.

This does not provide automatic whole-home backup.

Eligible S2400 AC products are covered by a 10-year limited warranty under the current warranty terms.

A support or warranty request will normally require the model, serial number, valid proof of purchase, a description of the fault and, where relevant, photos, videos or app screenshots.

Technical support first assesses the issue remotely and then agrees the appropriate remedy, which may include a software solution, repair, replacement part or product exchange.