Datasheet
ENERGY STORAGE SYSTEMS 7.0/9.0
ENERGY STORAGE SYSTEMS
1.0 PREFACE
ESS 7.0/9.0 is a new modular lithium-ion based energy storage system, which stores the surplus of the collected solar energy
for later demand. Energy can either be directed into the storage system or be fed into the public grid via an inverter.
Energy is available as required: in the evening, at night, or on a cloudy day.
With the ESS 7.0/9.0 System, consumers of solar power become more independent from electricity prices and use their
home-made eco-electricity when they need it.
ADVANTAGES
Store during the day; use day and night
Independent from daylight and public grid
Economic, cost-cutting and ecofriendly
Lightweight, save and space saving
Modular installation: the storage capacity can be adapted to your needs
Subsidized by the Federal Government of Germany: KfW-Program 275
TECHNICAL PROPERTIES
Powerful energy storage system
New lithium-ion technology: a 7 year warranty covering the system’s current value
High efficiency: 95 %
High discharge depth: 80 % DOD (Depth of Discharge)
Durable: 5,000 full cycles
Parallel installation of max. 6 modules possible
High operational safety
SAFETY MEASURES
Direct current relay and 2nd protection (chemical fuse) for a redundant battery cut-off
Overvoltage and low voltage monitoring for each cell string with redundant battery cut-off
Temperature monitoring for each cell string and current interrupt device (CID) in each cell
Protection against a reboot after deep discharge or any other serious error
No insecure parallel connection of cells without current interrupt device (CID) in each cell
Active current control as a function of cell voltage and temperature (derating)
Closed metal housing
GENERAL PROPERTIES ESS 7.0 ESS 9.0
Energy (nom./real) 6.74 kWh/5.39 kWh 8.5 kWh/6.8 kWh
Nominal voltage 55.5 V 54.0 V
Charge end voltage 61.5 V 61.5 V
Discharge end voltage 45.0 V 45.0 V
Capacity (nom./real) 121.5 Ah/ 97.2 Ah 156.6 Ah/125.3 Ah
Max. charge 90 A 120 A
Max. discharge current 300 A ( 3 sec.) 300 A ( 3 sec.)
Max. discharge power 18 kW* 18 kW*
Weight 95 kg 97 kg
Dimensions (mm) W x H x D 638 x 421 x 487 mm 638 x 421 x 487 mm
Communication CAN – SMA ready CAN – SMA ready
Battery chemistry Li-Ion NMC Li-Ion NMC
Discharge depth 80% DOD 80% DOD
Full cycles 5,000 5,000
Battery Management System
Monitoring of cell voltage, cell temperature,
current, derating and passive balancing
PERFORMANCE DATA
Energy density (weight) 71 Wh/kg 87.6 Wh/kg
DEVELOPED ACCORDING TO THE STANDARDS AND USER GUIDELINES
FOR STATIONARY ENERGY STORAGE SYSTEMS
VDE-AR-E 2510-50
VDE-AR-E 2510-2
DIN EN 62619 (draft)
FNN note
04/2016 version
USER INFORMATION
Discharge temperature (cells): 2 °C to +45 °C
Charge temperature (cells): 2 °C to +45 °C
Recommended storage temperature: 10 °C to 25 °C
Self discharge (cells): ca. 2 % per year
Max. parallel connection (of batteries): 6 (additional hardware required)
Protection class: IP 21
European Conformity (CE): yes
UN-test 38.3: yes
Warranty: 2 year warranty (optional extendable)
*depends on the respective inverter
2.0 TECHNICAL PROPERTIES OF A SINGLE MODULE
ESS 7.0 and ESS 9.0