Energy Storage

PV10710067 Growatt APX 10kWh High-Voltage Battery with BMS + Basic Set

10 kWh High-voltage storage system consisting of two APX modules (5 kWh each), complete with BMS and base unit. The standard size for a single-family home that wants to carry over the day’s surplus into the night.

€2,370.00
0 % VAT under § 12 Abs. 3 UStG
PV10710204 Solplanet Ai-HB 075A 10.24 kWh, Storage Set

The Ai-HB G2 Pro series is a state-of-the-art, modular high-voltage battery with capacities ranging from 7.68 kWh to 20.48 kWh per tower. It can be expanded to up to 81.92 kWh through up to four parallel configurations. With a robust BMS, IP65 protection, VDE certifications, a long service life (up to 8,000 cycles), a charge/discharge current of up to 30 A, and an efficiency of ≥ 95%, it is ideal for demanding, scalable energy storage solutions. Installation is simple and compatible with Solplanet hybrid inverters; control and monitoring are conveniently handled via an app.

€3,699.00
0 % VAT under § 12 Abs. 3 UStG
PV10710068 Growatt APX 15kWh High-Voltage Battery with BMS + Basic Set

15 kWh consisting of three APX modules (5 kWh each), including BMS and base unit. For households with a heat pump or wallbox where evening consumption is significantly above average.

€3,350.00
0 % VAT under § 12 Abs. 3 UStG
PV10710208 Solplanet Ai-HB 075A 20.48 kWh Storage Set

The Ai-HB G2 Pro Series is a state-of-the-art, modular high-voltage battery with capacities ranging from 7.68 kWh to 20.48 kWh per tower. It can be expanded to up to 81.92 kWh through up to four parallel configurations. With a robust BMS, IP65 protection, VDE certifications, a long service life (up to 8,000 cycles), a charge/discharge current of up to 30 A, and an efficiency of ≥ 95%, it is ideal for demanding, scalable energy storage solutions. Installation is simple and compatible with Solplanet hybrid inverters; control and monitoring are conveniently handled via an app.

€6,299.00
0 % VAT under § 12 Abs. 3 UStG
PV10710069 Growatt APX 20kWh High-Voltage Storage System with BMS + Basic Set

20 kWh High-voltage storage system consisting of four APX modules, pre-assembled with BMS and base. Designed for households that cover their heating and mobility needs with their own electricity.

€4,350.00
0 % VAT under § 12 Abs. 3 UStG
PV10710077 Growatt APX 30kWh High-Voltage Solar Storage Kit

30 kWh High-voltage storage system consisting of six APX modules, complete with BMS and base unit. The largest configuration in the series—for commercial and residential applications with a high base load.

€6,319.00
0 % VAT under § 12 Abs. 3 UStG
PV10710206 Solplanet Ai-HB 075A 15.36 kWh-Storage Set

The Ai-HB G2 Pro Series is a state-of-the-art, modular high-voltage battery with capacities ranging from 7.68 kWh to 20.48 kWh per tower. It can be expanded to up to 81.92 kWh through up to four parallel configurations. With a robust BMS,IP65 protection, VDE certifications, a long service life (up to 8,000 cycles), a charge/discharge current of up to 30 A, and an efficiency of ≥ 95%, it is ideal for demanding, scalable energy storage solutions. Installation is simple and compatible with Solplanet hybrid inverters; control and monitoring are conveniently handled via an app.

€3,880.00
0 % VAT under § 12 Abs. 3 UStG
PV10710066 Growatt APX 5kWh High-Voltage Storage Kit with BMS + Base

5 kWh High-voltage storage as an entry-level solution: an APX module, the battery BMS, and the base unit are coordinated and included in full. The storage capacity grows as additional modules are added.

€1,345.00
0 % VAT under § 12 Abs. 3 UStG
PV10710191 Solplanet Ai-HB G2 Pro 075A 7.68 kWh Storage Kit

The Ai-HB G2 Pro series is a state-of-the-art, modular high-voltage battery with capacities ranging from 7.68 kWh to 20.48 kWh per tower. It can be expanded to up to 81.92 kWh through up to four parallel configurations. With a robust BMS, IP65 protection, VDE certifications, a long service life (up to 8,000 cycles), a charge/discharge current of up to 30 A, and an efficiency of ≥ 95%, it is ideal for demanding, scalable energy storage solutions. Installation is simple and compatible with Solplanet hybrid inverters; control and monitoring are conveniently handled via an app.

€2,199.00
0 % VAT under § 12 Abs. 3 UStG
PV10710205 Solplanet Ai-HB 075A 12.8 kWh-Storage Set

The Ai-HB G2 Pro series is a state-of-the-art, modular high-voltage battery with capacities ranging from 7.68 kWh to 20.48 kWh per tower. It can be expanded to up to 81.92 kWh through up to four parallel configurations. With a robust BMS, IP65 protection, VDE certifications, a long service life (up to 8,000 cycles), a charge/discharge current of up to 30 A, and an efficiency of ≥ 95%, it is ideal for demanding, scalable energy storage solutions. Installation is simple and compatible with Solplanet hybrid inverters; control and monitoring are conveniently handled via an app.

€4,299.00
0 % VAT under § 12 Abs. 3 UStG
PV10710551 Fronius Reserva 9.5 (3x 3.15 Battery Module) Set

9.5 kWh Storage capacity from three Reserva modules, each with 3.15 kWh s, including BMS and base unit. The mid-range configuration for households for whom the basic storage system is too small and the full configuration is too large.

€5,805.00
0 % VAT under § 12 Abs. 3 UStG
PV10710207 Solplanet Ai-HB 075A 17.92 kWh-Storage Set

The Ai-HB G2 Pro series is a state-of-the-art, modular high-voltage battery with capacities ranging from 7.68 kWh to 20.48 kWh per tower. It can be expanded to up to 81.92 kWh through up to four parallel configurations. With a robust BMS, IP65 protection, VDE certifications, a long service life (up to 8,000 cycles), charging/discharging currents of up to 30 A, and an efficiency of ≥ 95%, it is ideal for demanding, scalable energy storage solutions. Installation is simple and compatible with Solplanet hybrid inverters; control and monitoring are conveniently handled via an app.

€5,990.00
0 % VAT under § 12 Abs. 3 UStG

A battery storage system, also known as an electricity storage system or energy storage system, stores the surplus solar power generated by the PV system during the day that exceeds the household’s consumption. The range includes battery modules and ready-to-use storage sets from 5 to 30 kWh for hybrid inverters, plug-and-play storage systems for balcony power plants and the appropriate accessories from Growatt, Solplanet, Fronius, EcoFlow, Trina, Anker and SAJ.

Three types of battery storage systems

Which design is suitable depends primarily on the system to which the storage unit is being added.

Type	In the range	Capacity per module	Suitable for
High-voltage modular storage	Growatt APX and ARK, Solplanet Ai-HB, Fronius Reserva, Trina, EcoFlow Ocean 2	2.56 to 5 kWh	Roof-mounted system with hybrid inverter
Low-voltage module storage	Growatt AXE, Solplanet Ai-LB	5 to 5.12 kWh	Roof-mounted system with hybrid inverter
Plug-in storage system	Growatt NOAH 2000 and NEXA 2000, Anker SOLIX Solarbank 3 E2700 Pro, EcoFlow DELTA 2	1 to 2.7 kWh	balcony power plant

Modular storage systems for rooftop installations are stacked into a tower using several battery modules and never operate on their own, but always in conjunction with a hybrid inverter that controls charging and discharging. They can be found under Storage for inverters, partly as individual modules and partly as ready-to-use sets with a control unit. Plug-and-play storage units combine the battery and control system in a single housing and are installed between the modules and the grid feed-in. They can be found under Storage for balcony power plants.

High-voltage or low-voltage

In a high-voltage storage system, the modules are connected in series; the voltage of the stack increases with each module added. In most systems, this includes a dedicated BMS unit – the battery management system – which monitors the cells and the charge state. A low-voltage storage system operates at around 50 V and is expanded by adding modules in parallel. The Growatt AXE features its BMS integrated into the module, is protected in accordance with IP20 and must therefore be installed in a dry indoor location.

In practice, the choice of design is determined by the inverter: it is designed for a specific voltage range and for certain storage systems.

Which storage system is compatible with which inverter

A storage system will only work with an inverter for which the manufacturer has approved it. The inverter’s list of compatible storage systems is decisive. For these devices in the range, the manufacturers’ lists specify:

Growatt MOD HU: exclusively the APX storage system
Growatt MOD XH: ARK, APX, AXE and ARK LV
Growatt MIN XH: ARK and APX
Solplanet ASW H-T2 and H-T3: Ai-HB only

For all other combinations, the storage list in the hybrid inverter’s data sheet applies. If a storage unit is not listed there, the combination is not approved. Matched combinations are available as storage-inverter sets.

How large the storage system should be

The key factor is consumption after sunset and in the early morning, as this is the only consumption the storage system can cover. A storage system that is significantly larger will not be fully charged on many days. As module-based storage systems increase in capacity in fixed increments, you can start small and upgrade later: for Growatt ARK, Solplanet Ai-HB and Trina in increments of 2.56 kWh; for Fronius Reserva from 3.15 kWh; and for Growatt APX and EcoFlow Ocean 2 from around 5 kWh. The upper limit per system is specified in the data sheet, for example 20.48 kWh for Solplanet Ai-HB G2 Pro, 25.6 kWh for Growatt ARK and 30 kWh for Growatt APX.

What matters in the data sheet

The usable capacity is slightly below the rated capacity; for the Growatt ARK module, for example, it is 2.3 out of 2.56 kWh. According to the data sheet, all batteries in the range use lithium iron phosphate (LFP). The number of charge cycles ranges from 3,000 for the EcoFlow DELTA 2 to 10,000 for the EcoFlow Ocean 2; most modules specify 6,000. The manufacturer’s warranty is generally ten years, five years for the EcoFlow DELTA 2 and fifteen years for the Ocean 2 module. The temperature range specified in the data sheet determines whether a garage or cellar is a suitable installation location.

Bases, distribution units and connection parts can be found in the accessories for battery storage systems, whilst complete systems with storage are listed under Complete PV kits with storage.

For photovoltaic systems and their essential components, no value added tax is charged where the conditions of Section 12 (3) of the German VAT Act (UStG) are met. You state during the ordering process whether they apply to you.

Frequently asked questions about battery storage

Is an electricity storage system the same as a battery storage system?

Yes. Electricity storage, battery storage, solar storage and energy storage all mean the same thing in a domestic context: a battery that stores solar power for later use.

How big should my battery storage system be?

Large enough to cover your consumption from the evening until the following morning. As the modular storage systems are expandable, you can start with a smaller size; the system’s upper limit is specified in the data sheet.

Can I retrofit a storage system?

With a hybrid inverter, yes, provided the storage unit is on the manufacturer’s list. If the system has a grid-tied inverter, an additional device is required, such as the Growatt SPA or the EcoFlow PowerOcean DC Fit converter. A balcony power plant can be supplemented with a plug-and-play storage unit.

Is every battery compatible with every inverter?

No. Voltage specifications and communication protocols depend on the manufacturer, and only approved combinations will work. These are listed in the inverter’s storage unit compatibility list.

Where should I install the storage unit?

Most modules are protected in accordance with IP65 or IP66. Whether the location is suitable depends on the temperature range specified in the data sheet; for the Growatt APX, for example, this is −10 to +50 °C. The Growatt AXE with IP20 should be installed in a dry indoor location.

How long does a battery storage system last?

The data sheets specify 3,000 to 10,000 charge cycles; most modules offer 6,000. The manufacturer’s warranty ranges from five to fifteen years depending on the system, usually ten.