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WattCycle 2.5kW 10kWh All-in-One AC Coupled Battery Storage System

Name: WattCycle 2.5kW 10kWh All-in-One AC Coupled Battery Storage System
Rating: 4.83 (41 reviews)

€2.139,99 EUR

⚡Important Notice: VDE and EN 50549 certifications for this product are currently in progress. Certification is expected between December 2026 and April 2027, depending on the certification body's processing timeline.

Add Storage to Your Existing Solar System

Compact 500 × 210 × 800mm all-in-one design
Designed to complement existing rooftop and balcony PV systems
Stores surplus solar energy instead of exporting it immediately
10kWh LiFePO4 battery for evening and overnight energy use
2.5kW rated output with up to 5kVA surge power
AC-coupled design works alongside compatible existing PV systems
Smart charging and discharging scheduling
Wi-Fi monitoring and remote control via WattCycle Home App
Supports solar self-consumption and time-of-use energy shifting
Backup power support for critical household loads
IP65 protection for flexible residential installation

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Local EU Warehouses
VAT Included
5+2 Years Warranty
24/7 Customer Support

Payment Method

WattCycle 2.5kW 10kWh All-in-One AC Coupled Battery Storage System

€2.139,99 EUR

Feature
Tech Specs
Reviews

Meet 10kWh All-in-One AC Coupled Battery Storage System

Add Smart Storage to Your Home Solar System

The WattCycle 2.5kW 10kWh All-in-One AC Coupled Battery Storage System adds battery storage to an existing rooftop or balcony solar setup. Instead of sending all surplus solar power directly to the grid, you can store more of it for evening and overnight household use.

Use More of Your Solar, Buy Less from the Grid

Battery storage helps shift surplus solar energy from daytime to the hours when your home actually needs it. Instead of relying as heavily on grid electricity in the evening, stored solar power can support household consumption and improve overall solar self-consumption.

10kWh Storage for More Solar Self-Consumption

With 10kWh of battery capacity and 2.5kW rated output, the system helps capture surplus daytime solar energy and make it available when your home needs it later. This can reduce grid imports and help you use a greater share of the electricity generated by your own PV system.

Long-Life LiFePO4 Storage with Active Balancing

The integrated 51.2V 200Ah LiFePO4 battery provides 10kWh of energy storage for repeated household cycling. Active balancing and intelligent battery management help maintain cell consistency and support reliable long-term energy storage.

Backup Power When the Grid Is Unavailable

In addition to solar energy storage, the system can supply connected critical loads during an unexpected grid outage. Fast UPS switching helps minimise disruption to supported household electronics and essential equipment.

Built for Year-Round Residential Energy Storage

With IP65 protection and a wide operating temperature range, the system is designed for flexible residential installation environments. Clear status lighting also provides an easy visual indication of charging, Wi-Fi connection, inverter operation and system faults.

Monitor Your Energy System from Anywhere

Built-in Wi-Fi connects the system to the WattCycle Home App for convenient remote monitoring and control. Track energy status, manage supported settings and understand how solar generation, battery storage and grid power work together from your smartphone.

Designed to Complement Existing PV Installations

The AC-coupled architecture is intended for homeowners who already have a compatible rooftop or balcony solar system and want to add energy storage. Instead of replacing the existing PV hardware, the WattCycle system works as a storage layer alongside the current solar installation.

Smart Energy Scheduling Around Your Home

Automatically store excess solar energy when generation is high and use stored power later when household demand increases. Charging and discharging schedules can also be adjusted to better match solar production, household consumption and electricity tariff periods.

10kWh Storage in a Compact All-in-One Design

The system integrates battery storage, power electronics and smart energy control into one compact vertical enclosure. Measuring approximately 500 × 210 × 800mm, it reduces the space and complexity associated with installing multiple separate energy-storage components.

From Rooftop Solar to Stored Home Energy

In a conventional PV system, solar panels and the microinverter send electricity directly to the home or grid. Adding WattCycle AC-coupled storage creates an additional energy layer, allowing surplus solar generation to be stored and used later rather than immediately exported.

Store Solar by Day, Use It at Night

During the day, compatible rooftop or balcony PV systems generate electricity through the existing microinverter. The AC-coupled storage system can capture available surplus energy, then return stored power later when solar generation falls or household demand rises.

A Complete Smart Energy Storage Package

The system package includes the main energy storage unit, smart metering components, Wi-Fi antenna, grid charging cable and installation hardware. Together, these components help integrate solar generation, household demand, battery storage and grid interaction into one coordinated energy system.

Tech Specifications

General

Battery Technology	LiFePO4
Total Energy	10kWh
Rated Capacity	200Ah
Rated Voltage	51.2V
Dimensions (L × W × H)	500 × 210 × 800 mm
Weight	95 kg
Protection Rating	IP65
Display	Touch Screen
Communication Protocol	PYLON 485
Battery Cycle Life	≥8000 Cycles @ 25℃, 70% EOL
Standby Self-Consumption	<300μA

Battery

Battery Internal Resistance	≤13.9mΩ
Standard Discharge Capacity	≥200Ah
Charging Method	Constant Current / Constant Voltage (CC/CV)
Charge Cut-off Voltage	56–58.4V
Charge Stop Voltage	56.8V
Discharge Stop Voltage	44V
Input Current	Max. 100A
Output Current	Max. 100A
Discharge Current Protection	100A / 300S
Cell Overcharge Voltage	3.6V
Cell Overcharge Recovery Voltage	3.55V
Cell Overdischarge Voltage	2.6V
Cell Overdischarge Recovery Voltage	2.65V
Pack Overcharge Voltage	57.6V
Pack Overcharge Recovery Voltage	56.8V
Pack Overdischarge Voltage	41.6V
Pack Overdischarge Recovery Voltage	42.4V
State of Charge (SoC) Range	40%–60%
Balancing Method	Active Balancing
Battery Discharge Efficiency	94% @ 48VDC

BMS Protection

Charge Temperature Protection	High: 70℃ (Recovery 60℃) Low: -20℃ (Recovery -10℃)
Discharge Temperature Protection	High: 70℃ (Recovery 60℃) Low: -35℃ (Recovery -30℃)
Short-Circuit Protection	Recovery via "Remove Load" and "Charge/Discharge Removal"

Inverter

Rated Load	2.5kW
Surge Power	5kVA
Input Voltage Range	170–280Vac, L+N+PE
Input Frequency	48–51Hz
Output Voltage	208 / 220 / 230 / 240Vac
Output Frequency	50/60Hz ±0.1
Input Power Factor	≥0.95 PFC
Output Waveform	Pure Sine Wave
Switching Time	<10ms (UPS Mode, Auto-switch During Grid Failure)
Overload Capacity (Battery Mode)	5 min @ 105%–120% Rated Load; 10 s @ 120%–150% Rated Load
Max. AC Charging Current	50A
Grid-Tie Power	0–2500W
APP Function	Grid-tie Time & Power Management and Control
Insulation Withstand Voltage	42V DC Between Battery and AC Side, Leakage Current <1mA
Energy Saving Mode	<13W (Sleep, No Output); <30W (No-load Output)

Environment

Operating Temperature	-10℃ to 55℃ (14℉ to 131℉)
Operating Humidity	0–98%

5 stars: 34 (83%)
4 stars: 7 (17%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Some of the reviews shown are from related products the merchant grouped with this one.

Integrazione consigliatissima ed economica

Ho acquistato la batteria solare a rack 48v e l'ho collegata alla power station Ecoflow delta 3 da 1 KW con il cavo arrivato in omaggio da wattcyle, ringrazio infinitamente Wattcycle, il tutto inserito nel mio camper come da foto. Soluzione eccezionale, ora ho una autonomia eccezionale ed un funzionamento veramente integrato ad un prezzo complessivo molto basso, La power Station Ecoflow riceve la carica da un pannello solare sopra il camper, 370W a pieno sole, che cosi carica il tutto.. L'installazione è stata valutata con attenzione per inserirla e fissarla in sicurezza, ammortizzata senza urti nel camper.

1 Pack (5.12kWh)

Great product!

Works perfectly! Even better than expected😃
I am definitely going to order another one soon.

1 Pack

Très bon

Très bon fonctionnement

1 Pack

Thank you for the new modern charging station

Thank you for the new modern charging station. It is made with high quality. I bought it exclusively as an energy storage device for my own consumption, but the ability to receive and give electricity to an external power grid requires professional attention.

1 Pack (5.12kWh)

Fungerar perfekt

Fungerar perfekt.

1 Pack (5.12kWh)

It works perfectly

It works perfectly. Very essy to connect and start it.

1 Pack (5.12kWh)

Excellent

Excellent. It provides a superior alternative to conventional work batteries.

1 Pack (16.07 kWh)

Super batterie et livraison

Super batterie et livraison rapide

1 Pack (16.07 kWh)

A készülék tökéletesen működik

A készülék tökéletesen működik. Masszív kivitelezés. Egy negatívum. A futár nem tudta háznál lerakni, mert nagy a tömege. Ezért nekem kellett menni a depoba átvenni, és utánfutóval hazavinni a csomagot.

1 Pack (5.12kWh)

All

All ok

Awesome buy

1 Pack (5.12kWh)

Too mean with the cables which is one of the

Too mean with the cables which is one of the reasons I no longer buy Bluetti products

2 Pack (10.24kWh)

These are awesome

These are awesome and looking at getting 2 more of these

Integrazione consigliatissima ed economica

Very😊

Very😊

Main delivery was fast..🤗. Cables 2pcs still coming. More information about delivery time schedules and contents needs.
It was quite amazing to see batteries on my parking site when no information arriving to country not exist. But all is quite okay. 8/10 now without cables delivery.

1 Pack (16.07 kWh)

Doet wat het moet doen prima

Doet wat het moet doen prima accu

Dělá přesně to co má

Dělá přesně to co má......super balancování 👍

1 Pack (5.12kWh)

I’ ll buy again when you have offers or it’s Black Friday because it’s a very good battery

I’ ll buy again when you have offers or it’s Black Friday because it’s a very good battery.Thank’s!!!

1 Pack (5.12kWh)

good

good

Sehr gute Batterie

Perfekte Qualit?t und hohe Kapazit?t (5120 Wh, die tats?chlich komplett nutzbar sind).

Ausgezeichnete Batterie, seri?ses Unternehmen

Ich teste die Batterie seit etwa einer Woche und kann bereits sagen, dass ich sehr zufrieden bin. Sie arbeitet absolut ger?uschlos und wurde in einer sehr stabilen, gut gepolsterten Verpackung geliefert.

Die Batterie verh?lt sich genau nach Handbuch �C selbst bei hoher Last (1,5/2 kW Spitze) zeigt sie keine unerwarteten Spannungseinbr��che (wie es sich f��r eine gute LiFePO4-Batterie geh?rt).

Die 5 kWh Kapazit?t wirken absolut realistisch. Jetzt, wo die W?rmepumpe nachts kaum l?uft, komme ich problemlos bis zum Morgen.

Zuvor hatte ich 16 AGM-Batterien... das ist ��berhaupt kein Vergleich.
Ausgezeichnetes Produkt, sehr zu empfehlen!

L?ste unser Problem mit Lastspitzenentgelten

Meine Solar-Firma hat f��r einen Gewerbekunden 8 Einheiten installiert. Die 100% Entladetiefe und die Lebensdauer von 6000 Zyklen haben die Konkurrenz deklassiert. Die Lastspitzenentgelte des Kunden sind um 65 % gesunken! Die Installation war werkzeugfrei �C die Module passten einfach in Standard-Racks. Der Kundendienst hat sogar remote dabei geholfen, die BMS-Einstellungen anzupassen. Absolut empfehlenswert f��r gewerbliche Anwendungen.

Bisher durchaus zufrieden

Der Akku hat alles, was unbedingt n?tig ist, und das in guter Qualit?t. Der Speicher arbeitet sehr gut. Diesen Akku werde ich auf jeden Fall bei der Planung meiner Solaranlage ber��cksichtigen.

Zuverl?ssige Backup-L?sung f��r den Heimserver-Raum

Die 5 Jahre Garantie und die LiFePO4 zellen haben mich ��berzeugt. Die Energiedichte ist enorm. Sie ersetzte meine alten Bleibatterien bei nur einem Drittel des Platzbedarfs. Laufzeit: 14 Stunden bei 800 Watt Volllast. Ein absolut lohnenswerter Kauf.

Sehr guter Verk?ufer mit hochwertigen Produkten. Ich werde wieder Batterien hier kaufen. Vielen Dank!

Ausgezeichnetes Produkt!

Habe es sofort in Betrieb genommen und es funktioniert einwandfrei. Mal sehen, wie es sich auf lange Sicht schl?gt.Ich halte Sie auf dem Laufenden.

Funktioniert wunderbar

Ich habe das Akku mal ausf��hrlich getestet und duchgemessen. Verarbeitung ist wirklich sehr sauber. Zellen sind neu und Innenwiderst?nde gut. Kurzschlusstest hat BMS sehr gut verkraftet, sofort abgeschaltet.

Absolut revolution?r f��r meine Solaranlage!

Habe vor 3 Tagen zwei dieser 48V Powerwall Batterien mit meiner 8kW Solaranlage installiert. Die 100Ah Kapazit?t ist perfekt. Versorgt meine komplette Werkstatt ��ber Nacht und hat immer noch 40% ��brig. Die ��berwachung ist super pr?zise, und das modulare Design machte die Erweiterung kinderleicht. Keine Spannungseinbr��che selbst bei Spitzenlast. Jeder Cent wert!