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

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

S2400 also has two MPPT inputs for connecting suitable solar panels directly. S2400 AC has no direct PV input and is designed for AC-coupled retrofit to an existing solar PV system.

Yes. With an AC-coupled retrofit, your existing PV inverter can generally remain in service. S2400 AC adds storage on the AC side, so the solar installation does not need to be rebuilt.

Before purchase, check the electricity meter, metering solution, connection route, existing circuit and local requirements.

In an AC-coupled configuration, direct data communication with the existing PV inverter is normally not required. The existing inverter continues to feed solar energy into the household AC system.

A compatible metering system measures household import and export. Using those measurements, S2400 AC can charge and discharge according to demand. Check the exact integration for your system.

S2400 AC is designed for straightforward commissioning through its intended AC connection under suitable conditions. Positioning, connection and app setup can be simple where the household installation is appropriate.

Work in the consumer unit, installation of a Smart Meter with current transformers, fixed wiring, an additional circuit or a multi-phase configuration should be checked or carried out by a qualified electrician.

Yes. S2400 AC can also operate on the AC side without your own solar panels, for example with a suitable time-of-use electricity tariff.

The battery can charge during lower-price periods and make stored energy available later in the home. Available functions depend on the metering solution, operating mode, tariff data and system configuration.

S2400 AC is available in 2.4 kWh, 4.8 kWh, 7.2 kWh or 9.6 kWh configurations. The right size mainly depends on evening and overnight electricity use, daily solar surplus and any planned higher-consumption loads.

The system can be expanded with compatible B2400 battery modules up to 9.6 kWh. More capacity increases the amount of energy available, but does not automatically increase the Power Box output.

S2400 AC has an IP65-rated enclosure and can be used indoors or outdoors where the location meets the product requirements.

The installation location still needs a stable surface, adequate ventilation, suitable temperatures and protection from standing water, flooding, severe direct weather exposure and combustible materials as required by the documentation.

S2400 AC can store surplus energy from the existing PV system on the AC side and make it available later for household use. This can increase self-consumption and reduce grid import.

With a compatible metering system, the battery can adjust charging and discharging to current household demand. Depending on metering solution, operating mode and configuration, supported zero-export or low-export control may also be available.

With a compatible time-of-use or dynamic electricity tariff, S2400 AC can use lower-price periods for charging and make stored energy available during higher-price periods.

Depending on operating mode, supported electricity-price data, consumption, existing solar generation, weather data and state of charge can be used for planning. Actual savings depend on your tariff, consumption profile, available metering data and settings.

The figures describe different operating modes and should not be treated as equivalent:

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

The power that can actually be used depends on connection type, cabling, circuit protection, operating mode and local requirements.

A Smart Meter is not mandatory for every basic operating scenario. For precise response to whole-home consumption, self-consumption optimisation, supported zero-export control and certain smart operating modes, however, a compatible metering system is required or recommended.

In the UK, the appropriate CT or Smart Meter solution depends on your electricity meter and household installation. Check compatibility before purchase. Work inside the consumer unit should normally be carried out by a qualified electrician.

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

A stable Wi-Fi connection at the installation location is important for data synchronisation, remote monitoring and supported smart-control functions. S2400 AC also uses Bluetooth for local device setup.

S2400 AC can be planned for a three-phase home. For a coordinated multi-phase solution, however, phase allocation, separate circuits, a suitable three-phase metering system, firmware version and required accessories should be checked in advance.

Do not simply connect multiple units to the same circuit to add power. The specific design should be confirmed by technical support and a qualified electrician.

During a power cut, S2400 AC no longer supplies energy through its normal on-grid connection. Suitable appliances can, however, be powered from stored energy through the separate off-grid output.

Depending on system configuration, the off-grid output provides up to 2,400 W and a short peak of up to 3,600 W for five seconds. Runtime and suitable appliances depend on storage capacity, state of charge and the power draw of connected loads.

This does not automatically provide whole-home backup.

Eligible S2400 AC products have a 10-year limited warranty in accordance with the current warranty terms.

For a support or warranty enquiry, you will normally need the device model, serial number, valid proof of purchase, fault description and, where relevant, photos, videos or app screenshots.

Technical support will first assess the case remotely and then agree the appropriate next step, such as a software solution, repair, spare part or replacement, subject to the applicable terms.