Microgrid control systems

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General information

Name of companySMA Solar
Website of companywww.sma.de
Name of productSMA Sunny Island MultiCluster 6/12/36 + Data Manager M powered by ennexOS
Product is hardware and/or software-platformhardware & software platform
Product standardized or project-specific?standardized
Distribution in which countries?worldwide
Unique selling proposition of the productOff-the-shelf plug&play solution

Services of the company

Company produces microgrid control hardwareyes
Company programs microgrid control softwareyes
Company provides system integration of microgrid control hardware and softwareyes
Company provides EPC services for microgrid projectsyes
Company provides operations and maintenance of microgridsno
CommentsEPC service by SMA Sunbelt GmbH

Scope of control system

Central monitoring and control unit (Hardware)yes
Control unit is standalone product or integrated into other device (if latter, which device?)Master Sunny Island is control unit
Other hardware components (e.g. smart meters, sensors, switches, domestic appliances, …)connection and switching box for battery inverters, genset and load; Modbus meters
Software-Platform for monitoring and control of the microgridno
Software-Platform is a cloud solution or installed on own server or computer?not applicable
Software compatible with third party hardware?yes
Hardware compatible with third party software?yes
Monitoring and/or control of microgrid via smartphone app?yes
CommentsMonitoring app requires stable internet access, comming H1/20

Microgrid layout

Which customers is the product aimed at? (e.g. residential, commercial, industrial, community, campus, military, …)residential- and (small-)commercial off-grid customers
Focus on offgrid, grid-connected or mobile microgrids?Off-Grid
How many kilowatts of installed generating power can be integrated? (FROM - TO)20 kW - 300 kW
How many different generators can be integrated?1 grid-forming generator and unlimited grid-parallel generators
AC bus systemyes
DC bus systemopt.
Hybrid AC and DC bus systemopt.
Which control strategy is used to run the microgrid? (e.g. central control, master/slave control, distributed control, …)master/slave control
Which components are needed for grid forming in islanding operation? (e.g. battery, diesel generator, …)Sunny Central UP battery inverter, Diesel Genset is opt.
Can the system be retrofitted to existing energy system assets?opt.
Can the system be expanded modularly after initial commissioning?yes
Comments8 kW each battery inverter unit. Maximum is 288 kW. (400 VAC)


Supported communication protocols (e.g. Modbus TCP, Sunspec, KNX, Zigbee, …)Meters via Modbus TCP or RTU, 3rd party PV inverter via Sunspec
Supported communication interfaces (e.g. RS485, Ethernet, Wireless LAN, analog inputs an outputs, …)RS485 (for meters), WiFi (for commissioning), Ethernet (plant communication)
Connectable generators (e.g. solar PV, wind turbines, CHP, diesel generators, fuel cells, hydro power plants, …)All AC grid parallel generators (PV, wind turbine, hydro, CHP), diesel genset or CHP for grid-forming, DC charger
Connectable storage systems (e.g. batteries [lead, lithium, redox flow, …], flywheels, heat storage, …)Lead-Acid, Redox-Flow, Lithium Ion
Connectable loads (e.g. heat pumps, heating boilers, charging stations for e-mobility, refrigerators, …)All AC loads, charging stations via EEBus
What components/brands can be integrated 'plug & play'?SMA Sunny Island 6.0/8.0H, all SMA PV-Inverters, SMA Energy Meter, Janitza Meter, Diesel Gensets with autostart via dig-in
What components/brands have to be integrated manually?3rd Party Modbus TCP / RTU meters, 3rd Party PV inverters via Modbus Sunspec
How are components integrated manually? (e.g. connection boxes, command-line interface, ...)Modbus register configuration via WebUI (for meter configuration)
Software-Platform has graphical user interface for integration and configuration of external devices?yes
Software-Platform has graphical user interface for programming energy management options?yes
Communication between control system and energy system assets is wired or wireless?wired communication
SCADA integration possible?yes
Other options to connect the microgrid to a higher-level distribution grid (e.g. smart meter gateway, CLS-interface, ...)no
Can smart home systems be integrated into the microgrid?opt.
Is the data encrypted during data transfer? If so, how?Yes (internal end-to-end encryption, external TLS connection)
How is the system protected against threats from outside?TLS connection
How are firmware updates realized?manual update by local WebUI / USB or automatic update by SMA update server


Grid conntected operationopt.
Islanding operationyes
Automated transition from islanding to grid-connected mode and backyes
Time required for transition from grid-connected to islanded mode (in seconds)<20ms
Uninterruptible Power Supply (UPS)no
Operation is also possible without connection to the internetin grid connected and islanding mode
Operation is also possible without connection to control room of higher-level distribution system operator (DSO)not possible
Asset control of distributed energy resourcesopt.
Load management defining curtailable loads and priority loadsyes
Automated dispatch control and optimizationyes
Automated Re-dispatching in response to external orders or unplaned internal eventsyes
Internal voltage and frequency regulation in islanding modeyes
Real time active and reactive power controlyes
Control of power exchange and voltage levels at point of interconnectionopt.
Aggregated ramp rate control at point of interconnectionno
Phase balancing between different AC phasesyes
Black start capabilityyes

Energy management options

Increase in self consumptionopt.
Increase of self-sufficiencyopt.
Peak Shavingno
Charging of electric vehiclesno
Energy management of thermal energy assets? (e.g. heat pumps, thermal storage, ...)no
Backup poweropt.
Zero feed-inopt.
Ancillary services for public grid (e.g. frequency regulation, reactive power control, …)On-Grid operation on request
Consideration of weather forecastsno
Consideration of energy load predictionsno
Consideration of changing energy prices on the energy marketno
Use of AI or self-lernings algorithmsno
Blockchain based billing and/or pay as you go solutionno
Participation in the energy marketno

Price indication

Hardware: One-time acquisition costs for central control unit (without VAT) FROM - TO (approx. retail price in Euro)
Hardware: Monthly maintenance costs for central control unit (without VAT) FROM - TO (approx. retail price in Euro)
Hardware: Costs for other necessary system components? (e.g. smart meters, switches, …)
Software: One-time acquisition costs (without VAT) FROM - TO (approx. retail price in Euro)
Software: Monthly maintenance costs (without VAT) FROM - TO (approx. retail price in Euro)
Are there renting or leasing options? If so, what are those options?
Price information availableno

Best practice project

Information on reference projects availableyes
Best practice project - ongrid
Best practice project - offgridOur latest reference project is an alpine chalet of the Österreichischer Alpenverein (ÖAV) at a height of 2740m. The chalet is using a Sunny Island Singlecluster solution with a Tesvolt Lithium storage system and the Data Manager M powered by ennexOS: https://www.sma-sunny.com/lithium-on-the-rocks-seethalerhuette-setzt-auf-solarstrom/ https://www.sma-sunny.com/en/lithium-on-the-rocks-seethalerhuette-uses-solar-power/

Data update

Data updateNov 2019

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