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BMZ ESS 7.0 Modular Energy Storage System

£3,213.80 excl. VAT

  • Max. charge current: 90 A
  • Max. discharge current: 300 A
  • Max. discharge power: 18 kW
  • Including DC cable
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The BMZ ESS 7.0 Modular Energy Storage System is a new modular lithium-ion energy storage which stores the generated surplus energy into battery modules for a later use. The inverter can then feed this power into the network or the energy storage. The power is available whenever it is needed: in the evening, at night and at times when there is little or no sunshine. With the BMZ ESS 7.0 Modular Energy Storage System, solar energy users become less dependent on electricity prices and can use their own eco-power whenever they need it.


The design of the system is based on a modular principle: Depending on the desired storage capacity, the battery modules can be adapted to the needs of the user. For the recommended configuration of the storage system, please refer to the product brochure.

Buy BMZ ESS 7.0 Modular Energy Storage System

  • Innovative lithium-ion battery technology
  • Service life of up to 20 years
  • Cycle stability at high currents
  • Partial cyclisation possible – no memory effect
  • Quick charging capability: fully charged in one hour
  • Efficient operation through active temperature control
  • Safety-tested technology in accordance with the latest standards
  • Integrated multi-level security concept
    • Deep discharge protection, overcharge protection
    • Voltage and temperature monitoring
    • Charge balancing between cells (passive balancing)
    • Determination of the state of charge and state of health (SOC and SOH)
  • UN test 38.3
  • European Conformity (CE)
  • Compatible with SMA, Sunny Island 3.0/4.4/6.0/6.0 Victron, Delios and Studer
  • Supports multi-cluster functionality (scalable up to 12 modules in parallel)

BMZ Solar Battery logo

Established in 1994, BMZ GmbH is headquartered in Karlstein am Main in Bavaria, Germany. With the massive expansion of production capacities at BMZ’s headquarters in Karlstein am Main, the company stresses the immense importance of this technology sector, in particular for Germany as an industrial centre. With the modular concept of the expansion, BMZ can respond more quickly and flexibly to future changes in the European market. Join our ZERO Home Bills Community.  The best solar batteries and solar battery systems from NASDAQ and Bloomberg listed manufacturers at best price.  

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Buy Li Ion Solar Battery Storage


Additional information

Weight 96 kg
Dimensions 63.8 × 48.7 × 42.1 cm


Rated Power (W/kW)

6.7 kW

Product Category

Energy Storage, Energy Storage Systems, Lithium-Ion, Lithium-Ion Batteries

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BMZ ESS 7.0 Modular Energy Storage System

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BMZ ESS 7.0 Modular Energy Storage System

Nominal capacity 6.74 kWh
Usable capacity 5.39 kWh
Full Cycle stability (80 % DoD) 5.000 (80 % DoD/0,5 C)
Nominal Voltage 55.5V
Charge end Voltage 61.5V
Capacity (nom./real) 121.5Ah / 97.2Ah
Max. charging current  90A
Max. discharge current  300A (3sec)
Max discharge power 18.kW
Battery technology Lithium-Ion (Nickel, Mangan, Cobalt)
Dimensions (width x width x depth) 638 x 421 x 487 mm
Weight 95 kg
Degree of protection IP 21
Protection class 1
Installation type Indoor installation
Ambient temperature range 10 – 25°C
Permitted humidity 0 – 95 %
Compatible SMA Sunny Island 3.0 M/4.4 M/6.0 H/8.0 H
Calendar service life > 20 Years
Guarantee  2 Years (extendable)

BMZ Solar Battery logo

Established in 1994, BMZ GmbH is headquartered in Karlstein am Main in Bavaria, Germany. In May 2016, the first section of the new BMZ production units was put into operation. In the two large production units of 4,800 m² each, up to 200 million lithium ion batteries of different types and sizes with a total storage capacity of approximately 15 GWh can be developed, built and tested every year, depending on need and demand. With the massive expansion of production capacities at BMZ’s headquarters in Karlstein am Main, the company stresses the immense importance of this technology sector, in particular for Germany as an industrial centre. With the modular concept of the expansion, BMZ can respond more quickly and flexibly to future changes in the European market.

Process-oriented quality management and product quality have been taking centre stage at BMZ since the company was established. The requirements of DIN EN ISO 9001:2008 are part and parcel of our management system, which is the same for all of BMZ’s facilities around the world. It is the basis for outstanding products and business excellence. Its scope covers the configuration, development and production of customised battery and rechargeable battery systems.

Product Datasheet

Instruction Manual

BMZ ESS 7.0 and 9.0 Off-Grid Operation Information

Safety Certificate

Service and Configuration Tool

UN Transport test 38-3 Declaration

BMZ ESS 9.0 Certificate UN38.3

IEC-62133 and IEC-60086-4 Declaration

UL-2054 and UL-2595 Declaration

Warranty BMZ ESS (German)