By Andres Salazar, Sonnen Inc Learn more at www.opal-rt.com

1. Residential Battery Storage Systems. Design support experience using
Hardware in the Loop Opal-RT
Andres Salazar
Sonnen Inc, R&D Atlanta GA

2. Company Overview

3. sonnen
European Market Leader for intelligent Li-Ion-Storage systems
» Manufacturer of intelligent Li-Ion-Storage
Systems for both residential and commercial
segment
» HQ in Germany, Daughter Company in USA
(HQ in Los Angeles, CA, R&D in Atlanta, GA)
» Pioneer with market experience since 2010
and market presence in Europe, USA and
Australia
» 10.000 systems sold
» > 100% annual growth
» 150 employees in EU and USA
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4. Product Overview

5. 5
eco - white
eco – white incl. extension cabinet
Cutting Edge Design
Residential Solution Becomes Part of Home

6. sonnenBatterie eco
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» Fully integrated, AC-coupled system and easy to install
(“Plug & Play”)
» Optimized self-consumption – Weather forecast, self-learning
algorithm
» Comfortable and easy control via App, Internet or Touch-
Display
» Broad portfolio for private households and small businesses
» High software intelligence
• Intelligent „Peak Shaving“
• Demand Side Management
• VPP Aggregation through
remote control
Remote control via mobile app,
tablet or laptop

7. Fully integrated Storage System
» Complete operable AC-system
» Perfectly selected and synchronized components including Energy Management
» Intrinsically safe( Non thermal runaway) and reliable Lithium-Iron-Phosphate Battery
(SONY) with unique Warranty of 10,000 cycles
» Easy and cheap to install
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Battery
Power Electronic /
Inverter
Touch Display and
Energy Manager
High Level Controller
sonnenBatterie eco 8
Cabinet

8. Residential Product Portfolio Europe/Australia
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» Basic cabinet with 2 kWh (eco 8.0) - can be wall-mounted
» Extension cabinet for modular capacity up to 16 kWh (in 2 kWh
steps) - Adding battery capacity at any time
» 10,000 cycles @ 100% DOD
» 10 year warranty

9. Residential Product Portfolio USA
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» Basic cabinet with 4 kWh (eco 4.0)
» Extension cabinet for modular capacity up to 16 kWh - Adding
battery capacity at any time
» Back-Up + Off-Grid functionality included
» 10,000 cycles @ 100% DOD
» 10 year Warranty

10. sonnen is a multipile solution provider
Ability to adress several use cases
Energy Management Hub for every Home
» Solar day & night
» Integration of Power and Heat
» Demand-Side-Management and Smart Home
» Tariff optimization (Time-of-Use Shifting)
» Back-Up-Power
» Data Monitoring and Analytics
Demand Charge Reduction
» Intelligent Peak Shaving
» Reduce commercial customers power bill by 20-50%
Grid Services and Energy Market Integration
» Remote Control and VPP aggregation
» Energy Trading / Arbitrage
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11. basic overview
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12. 21.02.2017 sonnen GmbH 12
basic overview II

13. challenges – hardware - software
- Inverter Dynamic operation
In Nano Grid operation
- Optimal Charge-Discharge
- Health monitoring of the
batteries
- Software Releases Test
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14. Nano-grid Operation
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-Sources
-Scenarios
Real – Time Results
Power Electronics Model using eHS
Example: AC Start-Up simulator
Ts: 295 ns

15. Optimal Charge-Discharge and Software testing
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PV Inverter
Inverter
LiFePO4
Batteries
Load
Panel
ATSM
M
Internal sonnen computer(control)
Modbus Protocol

16. 21.02.2017 sonnen 16
A
T
S
Modbus RTU
Modbus TCP
Battery Model
PV Model
Low Frequency Inverter Model (on eHS)
Modbus Communication
Ts = 225ns
Python scripts for
automated testing

17. Battery Health Monitoring
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Battery Model (on eHS)
PV Model
High Frequency Inverter Model
(on eHS)
Battery Aging Diagnostic
Through Internal Impedance Measurement

18. Summary
- Opal systems in specific OP4510 is allowing sonnen R&D group
to develop :
- Analysis of the stability in Bi-directional inverter control
topologies while connected to nano-grids.
- Testing the implementation of optimal battery charging and
discharging under multiple scenarios involving real weather and
demand data.
- Validation and testing of new software releases in an
accelerated and automated way without the need of external
hardware.
- Implementation of novel algorithms for measuring the battery
impedance while using this information for aging diagnostic of
the batteries.
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19. references
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Ginart, A. Salazar and R. Liou, "Transformerless Bidirectional Inverter for Residential Battery Storage Systems," 2016 IEEE Green
Technologies Conference (GreenTech), Kansas City, MO, 2016, pp. 18-23.
Ginart, A. Salazar, D. Patel, J. Roach, C. Restrepo and H. Schweizer, "Air Conditioning (A/C) Startup Simulator for Evaluating Nanogrid
Operation," 2016 IEEE Green Technologies Conference (GreenTech), Kansas City, MO, 2016, pp. 124-129.
Ginart, R. Riley, B. Hardman and M. Ernst, "Closed-Forms Solution for Simplified PV Modeling and Voltage Evaluation Including Irradiation and Temperature
Dependence," 2013 IEEE Green Technologies Conference (GreenTech), Denver, CO, 2013, pp. 105-112.
doi: 10.1109/GreenTech.2013.24
D. I. Stroe, M. Swierczynski, A. I. Stan, V. Knap, R. Teodorescu and S. J. Andreasen, "Diagnosis of lithium-ion batteries state-of-health based on
electrochemical impedance spectroscopy technique," 2014 IEEE Energy Conversion Congress and Exposition (ECCE), Pittsburgh, PA, 2014, pp.
4576-4582.

20. Thank you.
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