Retrofit
For homes with an existing compact solar system
Already generating solar power? The S2400 AC adds battery storage to your existing system so surplus energy can be used later in the home.
Use more of the solar power you already generate.
Sunpura S2400 AC Home Battery – 2.4 kWh AC-Coupled Storage
Sunpura S2400 AC Home Battery – 2.4 kWh AC-Coupled Storage
Regular price
€969,00
Sale price
€969,00
Regular price
€1.219,00
Unit price
per
Installation
Plug & Play in 5 mins
Lifespan
8,000 charge cycles
Smart Home
Tibber, Shelly & 700+ more
Backup
2400W Off-Grid output
Gratis im Lieferumfang enthalten
Smart Energy Zubehör für Steuerung, Messung und mehr Eigenverbrauch.
Sunpura Smart Plug
€49,00
€0,00
Smart Meter / P1 Meter
€79,00
€0,00
Details & benefits
The Sunpura S2400 AC is an AC-coupled home battery for existing solar and home energy systems. It is designed for households that already generate solar power and want to increase self-consumption without rebuilding the entire solar setup.
AC-coupled battery storage for existing solar panels
The S2400 AC works without direct PV input. Instead, it is integrated on the AC side of an existing energy system, making it a flexible retrofit option when you want to add battery storage to an installed solar setup.
- 2.4kWh base capacity: stores energy for evening use, peak demand and smarter tariff strategies.
- Modular expansion: expand with B2400 battery modules up to 9.6kWh system capacity.
- AC-coupled design: suitable for existing solar and plug-in solar systems.
- Smart Meter integration: supports more precise self-consumption and load control.
- Time-of-use tariff ready: helps you plan charging and discharging around cheaper and more expensive electricity periods, where supported.
- LiFePO4 and IP65: stable battery chemistry with robust protection for everyday use.
- Backup output: up to 2,400W off-grid AC output for selected essential loads.
Upgrade your current solar setup without starting again
If your existing solar panels already produce more energy than you can use at certain times, the S2400 AC gives you a practical route to store more of that energy and use it later. It is especially relevant for households looking for smart self-consumption, flexible expansion and app-based energy control.
Performance and savings depend on your solar system, tariff, household loads, installation conditions and compatible metering setup.
UK installation note: AC-coupled battery storage must be checked against the existing solar system, meter, consumer unit and UK grid-connection requirements. Installation may require a suitably qualified electrician.
Verzending
De vermelde prijzen zijn exclusief btw en eventuele andere toepasselijke belastingen. Verzendkosten zijn niet inbegrepen. De exacte verzendkosten worden tijdens het afrekenen op basis van je afleveradres weergegeven. Afhankelijk van het product kan de bestelling per pakket, via palletvervoer of via een voor lithiumbatterijen geschikte vervoerder worden geleverd. Een bestelling kan uit meerdere zendingen bestaan. Meer informatie vind je in ons verzendbeleid.
30-day money-back guarantee
Op je aankoop zijn het wettelijke herroepingsrecht en, indien van toepassing, het vrijwillige retourbeleid van Sunpura van toepassing. Voorwaarden, termijnen, uitzonderingen, retourkosten en retourinstructies vind je in ons retour- en terugbetalingsbeleid. Neem voor het terugsturen van een lithiumbatterij eerst contact op met de productservice, zodat je de juiste veiligheids- en verzendinstructies ontvangt.
Sunpura® manufacturer warranty
Sunpura staat voor kwaliteit en een lange levensduur. Onze producten worden gedekt door een fabrieksgarantie, zodat je ook na aankoop op ondersteuning kunt rekenen.
De exacte garantieduur en voorwaarden vind je op de productpagina of in de garantie-informatie. Neem voor een garantieaanvraag contact met ons op via contact@sunpuraenergy.com en vermeld je bestelnummer.
Deze garantie geldt naast je wettelijke rechten als consument.
Long-term technical support
Ook na je aankoop staan we voor je klaar.
Heb je vragen over de installatie, configuratie of het gebruik van je Sunpura-producten? Ons supportteam helpt je graag. Neem contact op via contact@sunpuraenergy.com.
Get more from every kilowatt-hour you generate
With the Sunpura S2400 AC, you can store surplus solar power from an existing solar system, increase self-consumption and use energy when it is most valuable to your home.
Illustrative savings comparison
£
0
/ year
Solar panels only (without battery storage)
Some solar electricity is used directly, but without battery storage the surplus is no longer available to your home in the evening.
£ 354
/ year
Solar panels + Sunpura S2400
Surplus energy stays in your home and remains available for your own use after sunset.
£ 788
/ year
Sunpura S2400 + Dynamic Tariff
Intelligent charging and discharging can target lower-cost periods and improve the overall value of your home energy system.
£ 1.335
/ year
UK estimate pending
Payback period
1.970 kWh
Annual renewable electricity generation
1.773 kg
Estimated annual CO₂ reduction
Why the difference can be so significant
The benefit comes not only from storing energy, but from using it more intelligently at the right time.
Use more of your own energy
More of the electricity you generate is used in your own home instead of being exported when it has less value.
Use energy outside solar-generation hours
Stored energy remains available in the evening, overnight or whenever solar generation is lower.
Smart control
With compatible time-of-use tariffs and smart devices, energy can be used when it makes the most financial sense.
Use stored solar energy when grid electricity costs more. Increase potential savings by combining the system with a compatible time-of-use tariff. dynamic electricity tariff
Important: Illustrative values only. This calculator has not yet been validated against UK tariffs, export payments, installation costs or household consumption. Actual savings and payback vary by home, system configuration and energy tariff.
Is the Sunpura S2400 AC right for your existing solar system?
Designed for households that already generate solar power and want to increase self-consumption with AC-coupled battery storage, without rebuilding the existing solar installation.
AC-coupled battery storage
For PV-Anlagand With vorhandandem Inverter
The S2400 AC connects on the AC side and is intended for systems where the solar panels and inverter are already installed.
Add battery storage without redesigning the existing solar array.
Dynamic tariff
For homes on a variable or time-of-use electricity tariff
Charge during lower-cost periods and use stored energy when grid electricity is more expensive.
Charge more flexibly. Use energy more intelligently.
Smart Meter
For households that want more precise control of energy flows
With a compatible energy meter and the Sunpura app, the S2400 AC provides clearer insight into consumption, grid import and battery demand.
More Kontrolle via Eigandconsumption and Grid imports.
How the S2400 AC works with your existing solar system
The S2400 AC is designed for homes that already generate solar power. It stores energy on the AC side and makes it available later, using compatible meter data, household demand and tariff information.
Store energy from your existing solar panels more intelligently
Your existing solar system continues to generate electricity as normal. When generation exceeds current household demand, the S2400 AC can store that surplus for later use.
Use stored energy when it has greater value
In the evening, overnight or during higher-price tariff periods, the S2400 AC can supply stored energy and help reduce electricity drawn from the grid.
Backup power for essential appliances
The S2400 AC is more than retrofit battery storage. During a power cut, its dedicated off-grid output can supply selected devices, subject to battery charge, available power and the connected load.
Power for the devices that matter during a power cut.
During a power cut, the S2400 AC can continue to supply selected devices through its dedicated off-grid output, such as a router, lighting, chargers or smaller household appliances.
2,400 W off-grid output
Supplies selected devices when the grid goes down.
For essential everyday devices
Suitable for selected devices such as lighting, internet equipment, chargers and smaller household appliances.
3600W Spitzandpower for kurze Lastspitzand
Supports short power surges through the dedicated off-grid output.
Safety
Layered protection for everyday use
Integrated protection functions support safe operation in the event of overcurrent, overvoltage, short circuit or abnormal temperature.
Weather resistance
Robust for everyday use and suitable sheltered outdoor locations
The IP65 enclosure supports flexible placement when the installation and environment meet the product requirements.
System protection
Intelligent monitoring for long-term stability
Battery and system monitoring help keep operation stable, transparent and practical for everyday use.
Energy, intelligently managed.
Sunpura analyses electricity prices, solar generation and household demand in real time, then manages energy flows automatically to improve self-consumption, control and potential savings.
See everything in one place, directly in the app.
View solar generation, consumption, battery charge and electricity prices in one place. The Sunpura app helps you understand energy flows and manage compatible devices more intelligently.
View energy flows in real time
Track how much electricity your solar panels generate, how much your home uses and when the battery charges or discharges.
Make better use of dynamic electricity tariffs
Charge during cheaper periods and use stored energy when grid electricity costs more.
Automatically optimise self-consumption
The system helps your household use more of its own solar power instead of exporting surplus energy unnecessarily.
Manage compatible energy meters, smart plugs and appliances
Connect compatible energy meters and smart appliances for greater everyday automation.
An open smart-energy ecosystem
Sunpura HEMS can connect with compatible time-of-use tariffs, energy services, energy meters, smart plugs and smart-home systems for more precise control of solar power, battery storage and grid electricity.
Smart Meter
Compatible energy meter
Smart Plug
Dynamic electricity tariff
700+ energy providers
Smart home
Actual optimisation depends on the system configuration, compatible metering equipment, electricity tariff, consumption profile and local installation.
Versatile design for modern homes
From balconies to family homes, the Sunpura S2400 AC can adapt to a range of household energy needs.
Adding S2400 AC battery storage to an existing solar system
The S2400 AC is intended for homes that already use rooftop or plug-in solar and want to add storage on the AC side. The permitted UK connection method depends on the existing system, metering setup, consumer unit and confirmed UK product configuration.
Installation & setup
From an existing solar system through compatible energy metering to app configuration.
From an existing solar system to intelligent battery control
Check your existing system
First check whether your existing solar installation, inverter, electricity meter and household wiring are suitable for the proposed AC-coupled battery configuration.
Connect the Smart Meter
A compatible energy meter helps measure consumption, surplus generation and grid import so battery operation can respond more accurately.
Configure the app
After commissioning, the Sunpura app provides clearer control of battery behaviour, consumption data and compatible time-of-use tariff settings.
Note: installation varies by solar inverter, electricity meter, consumer unit, accessories and local connection requirements. Always follow the official UK product documentation and safety instructions. Electrical work must be carried out by a suitably qualified electrician.
What's included with the S2400 AC
The main components supplied to get started with the AC-coupled battery. Actual contents may vary by selected version or bundle.
A2400 AC ×1 + B2400 ×1
5 m AC-kabel × 1
Rear mounting block ×2
M5 × 12 combination Phillips screws ×18
M8 × 80 self-tapping expansion bolts
Rear mounting bracket ×1
Rear mounting block ×2
Documents
Images and quantities may vary by bundle, accessories and production batch. The product configuration shown in your basket takes precedence.
Technical details
The key power, battery and system specifications for the Sunpura S2400 AC at a glance.
2400Wh
Capacity
LiFePO4
Battery chemistry
800W
AC output (grid-connected)
2400W
Max. AC input power
3,600 W / 5 s
Peak power
230V
Rated voltage
8,000 cycles
Cycle life
48V
Nominal battery voltage
IP65
Ingress protection rating
−20 °C tot 55 °C
Operating temperature
450 × 430 × 285 mm
Dimensions
14 kg / 26.5 kg
Weight: A2400 AC / B2400
WiFi / Bluetooth
Communication
AC-coupled
System type
No direct PV input
PV connection
Downloads & documents
Alle wichtigand Unterlagand to the Sunpura S2400 AC on einand Blick – from User manual via Technical specifications Up to Zertifikatand.
Product documents
S2400 AC user manual
Step-by-step guidance for setting up, operating and using the Sunpura S2400.
For setup, operation and everyday use
Safety information & alerts
Important information about safe operation, protection functions and the system's main alarm messages.
For safe operation and an overview of alerts
S2400 AC technical datasheet
A concise summary of the main technical specifications, including capacity, power, ingress protection and system configuration.
For comparison, planning and technical checks
Certificates & compliance
EMC compliance
Evidence of the system’s electromagnetic compatibility.
Relevant compliance evidence
RED compliance
Relevanter Nachweis for Funk- and Kommunikationskomponandtand.
For communication and radio modules
RoHS compliance
Evidence of compliance with applicable restrictions on hazardous substances.
EU material and substance compliance evidence
REACH compliance
Relevant information on substances and regulatory requirements.
Regulatory evidence for substance requirements
VDE-AR-N 4105 compliance evidence
Technischer Nachweis for netzbezogande Anforderungand in Deutschland.
Relevant for Deutschland and Netzanforderungand
EN 50549 compliance evidence
Relevant evidence for European grid-connection requirements.
European evidence for grid-connection requirements
Frequently asked questions about the Sunpura S2400 AC
Answers about adding AC-coupled battery storage to an existing solar system, including metering, time-of-use tariffs, zero export, backup output and warranty.
Retrofit & compatibility7
Self-consumption & electricity tariffs3
Smart Meter, App & System3
Backup power, warranty & support2
Retrofit & compatibility
7Was is the Unterschied zwischand S2400 and S2400 AC?
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.
Can I add the S2400 AC to an existing plug-in or rooftop 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.
Does the S2400 AC need to communicate directly with my existing solar inverter?
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.
Can I install the S2400 AC myself?
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.
Can I use the S2400 AC without solar panels?
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.
What battery capacity do I need, and can I expand it later?
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.
Can the S2400 AC be installed indoors or outdoors?
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.
Self-consumption & electricity tariffs
3How can the S2400 AC optimise self-consumption and zero export?
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.
Wie nutzt the S2400 AC einand dynamic electricity tariff?
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.
What do 800 W, 2,400 W and 3,600 W mean for the S2400 AC?
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.
Smart Meter, App & System
3Do I need an energy meter, and which metering solution is compatible with my electricity meter?
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.
Do I need WiFi and the Sunpura app?
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.
Can the S2400 AC in a dreiphasigand Home eingesetzt werdand?
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.
Backup power, warranty & support
2Wie funktioniert the S2400 AC with a Power cut?
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.
How do the 10-year warranty and technical support work?
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.