Bijlage-3-Ventus-Fire-Safety-Report.pdf-(geanonimiseerd)

FIRE SAFETY REPORT Date Revision 2A 2023-07-11 This document serves as a description of technology& functionalities usedfor batteryenergystorage systemVENTUS lineto ensure fire protection & safety. © TESLAGroupAllrights reserved. 4 Systemsafety VENTUS systemcomposition 5 Batteryracks 6 7 Inverters Technologymodule 8 Stepstofollow 9 10 Fireprotectiondesign 15 Fireprotectionequipment 17 Firecontrolpanel 20 Aerosolfiresystem 25 Systemactivation 26 Controlsystem 27 Q&A 29 List of abbrevations © TESLAGroupAllrights reserved. SAFETY isvery important part to provide stable & secure system operation over long time. System consist many parts which provide measures to prevent hazard situations & active solutions in the event of unexpected events.

The whole system is secured several times against overvoltage thanks to fuses, gridprotections as well as continuous monitoring of all key parameters in thesystem A reliable and correctly dimensioned cooling system (with CFD analysis) provides protection against overheating of thetechnology Included detection systems warn of the emergence of undesirable situationslikeexceeding the temperatures of modules or inverters The battery cell technology itself is built to prevent their deformation up to a temperature of 800 ° C and a normal life of 20+ years (evidenced by UL9540 certification) An integrated fire alarm system that detects problems in time and can activate the necessarytechnologies Container system as modularsystemto prevent the spread of potentially dangeroussituations Central stop system integrated in each containerunits Extinguishing agent which, in the event of a fire, expels the air out of the endangered parts of the container and prevents the system from igniting (this system prevents combustion and thus also the potential formation of hazardoussubstances) © TESLAGroupAllrights reserved. VENTUS COMPOSITION of the system in individual parts as a modular system for quick installation and customization for the customer. Batteryracks 1P416S 372. 7 kWh Power conversion system DELTA EPCS 1-1.

725MW Technology module TESLA product Metalicsupport platform TESLA product © TESLAGroupAllrights reserved. BATTERY RACKS Manufacturer Racknominalcapacity Model typ Nominalpower Batterycelltype Batterycellcapacity Batterycellchemistry Maximum C-rate Depthof discharge Guaranteedcapacity Technicalservicelife Batteryefficiency Self-discharge Rackdimensions Rackweight Ingressrating Ambienttemperature Coolingtype Firesafetysystem Certification CATL 372. 7 kWh 1P416S 1331. 2 VDC+-12. 5% 280 Ah 896 Wh LiFePO 4 1. 0 upto 95% 80% @6000cycles, 95%DoD, 25C, 0. 5C > 12 years > 93.5% < 3.5 % monthly 2280 x 1300 x 1300 mm (H x W x D) 3550 kg IP66 ° -30~55C Liquid(50% ethyleneglycol/ 50% agueoussolution) Areosol(Heptafluoropropane) IEC61000-6-2/-4, IEC62477, IEC62619, UN3. 83, UL9540A, UL1973, VDE-AR-E 2510-50, IEC62477 ° © TESLAGroupAllrights reserved.

INVERTERS Manufacturer Type NominalAC power AC voltagelevel DCvoltagerange Max efficiency Frequency Reactiontime Dimensions Weight Ingressrating Ambienttemperature Functionalities DELTA EPCS1000-1725-IEC ° 1000-1725 kW @40C 400-690 V +-10% upto1500 VDC > 98.3% 50Hz < 200 ms 2260 x 2200 x 1100 mm (H x W x D) 2600 kg IP55 ° -30~60C AdvancedP/Q, Frequency/Voltage, and VSG control Utility-gradeprotectiondesignedforharsh environment DC and AC-coupledstorageapplicationsAutomaticvoltage and frequencyregulationActiveand reactivepower compensation, Anti-Islandingdetection, islandingcontrol operation Forcedair ENTSO-E IEC 62477, IEC 61000-6-2, IEC 61000-6-4 AR-N 4110, G99 Coolingtype Gridstandard Certification © TESLAGroupAllrights reserved. TECHNOLOGY MODULE Manufacturer Type Dimensions Weight Material Coolingtype Ingressrating Equipment TESLA BLUE4200 4200 x 2440 x 2900 mm 4000-4500kg Aluminimumplateswithisolation Forcedair IP45 DCcombinerbox Controlcabinet Localcontrolercabinet Firecontrolpanel Auxilliaryconsumptioncabinet UPSback-up EMS system © TESLAGroupAllrights reserved. STEPS TO FOLLOW to providemeasureswhichcanhelpto ensure the safe use of Li-ion batteries and minimize the risk of fire. Lithium-ion(Li-ion) batteriesare commonlyusedin variousapplications, including electronicdevices, electricvehicles, and renewableenergysystems.

WhileLi-ion batteriesofferhighenergydensityand longcyclelife, theycanalsoposefire hazardsifnotproperlydesigned, manufactured, and used. Here are somemeasures to providefiresafetyforLi-ionbatteries: Design and manufacture: Li-ionbatteriesshouldbedesignedand manufacturedwithsafetyin mind. Thisincludesusinghigh-qualitymaterials, ensuringpropercellspacing, and addingsafetyfeaturessuchas overcharge and over-dischargeprotection, thermalrunawayprevention, and a battery management system(BMS). Storage: Li-ionbatteriesshouldbestoredin a cool, dryplaceawayfrom flammablematerials. Avoidstoringthemin directsunlightor nearsourcesof heat. Charging: Useonlychargersthatare specificallydesignedforLi-ionbatteries and followthemanufacturer'scharginginstructions. Overcharging, undercharging, or chargingtooquicklycancausethebatteryto overheatand catchfire. Transportation: Li-ionbatteriesshouldbetransportedin accordancewiththe relevantregulationsand guidelines. Thisincludesusingapprovedpackagingand labeling, avoidingextremetemperatures, and preventingphysicaldamage. Use: Li-ionbatteriesshouldbeusedin accordancewiththemanufacturer's instructions. Avoidexposingthemto extremetemperatures, overloadingthem, or puncturingthem. Monitoring: Regularlymonitor thetemperatureand voltageof thebattery duringcharging, use, and storage.

Ifyounoticeanyabnormalitiessuchas swelling, overheating, or leaking, stop usingthebatteryimmediatelyand seek professionalhelp. 1. 2. 3. 4. 5. 6. © TESLAGroupAllrights reserved. FIRE PROTECTION DESIGN as startingpoint to providesafetyfromdesign &constructionofbatterystorage. Power conversion system As separateunits withthermal Distances Betweenunits& partsto prevent from spreading potential hazards and to provide spaceforproper coolingof batteries sensors, overvoltage& surge protection Batteryracks as separateunits withmin. 60 minutesfire resistance Technology module consist of additional overvoltage & surgeprotection Equippedalso withsensors& detectors Consistoffire alarmsystem& monitoring systemto control eachpart of system Equippedwith firesuppresion aerosolsystem © TESLAGroupAllrights reserved. FIRE PROTECTION DESIGN forbatteryracksas most importantpart consistingli-ionbatterycells. Smoke detector Heat sensor Door sensor Aerosolcapsule forfire extinguishing system Chiller forproviding temperature management for eachbatteryrack Battery packs consist battery cells, electrical connection& liquid heating/cooling system Controlbox providingDC/AC + dataconnection Enclosure withIP66 & 60 minutes fire resistance © TESLAGroupAllrights reserved. FIRE PROTECTION DESIGN forbatterycellsas keyelement of wholebatteryenergystoragesystem.

Cell, modules and rack have all passed the UL9540A test, and the test results show that thermal runaway is strictly controlled within the initiating cell, there is no flaming, flying debris or gas explosion. And adjacent cells and modules function well after test. On this basis, we designed the fire detection and suppression system. The battery cell technology itself is built to prevent their deformation up to a temperature of 800 ° C and a normal life of 20+ years (evidenced by UL9540 certification). UL9540assafetystandardforenergystoragysystemsinclude:safetyofBESS, functionalsafety,firedetectionsuppresion, containment, environmentalperformance and more. © TESLAGroupAllrights reserved. FIRE PROTECTION DESIGN forbatterycellsas keyelement of wholebatteryenergystoragesystem. UL 1973is a safety standard for stationary batteries for energy storage applications that is not specific to any one battery technology or chemistry and can apply toLi-ion BESSs, as well as ESSs using other battery chemistry. The standard includes construction requirements, safety performance tests and production tests.

UL1973 contains a series of construction parameters, including requirements for nonmetallic materials, metallic parts resisting corrosion, enclosures, wiring and terminals, electrical spacing and separation of circuits, insulation and protective grounding, protective circuits and controls, cooling/thermal management, electrolyte containment, battery cell construction, and systemsafety analysis. Mechanical tests are also required by UL 1973, including a vibration test, shock test, and crush test, which only apply to LER applications. Other mechanical tests that apply to all systems include a static force test, impact test, drop impact test, wall mount fixture/handle test, mold stress test, pressure release test, and a start-to-discharge test. Additional environmental tests are also required by UL 1973, including a thermal cycling test, resistance to moisture test, and a salt fog test The internal fire test is meant to demonstrate how theESSwill prevent a single cell failure within the battery system from cascading into a fire and/or explosion. In the internal fire test, the fully chargedEnergy storage solutionis subjected to heating until thermal runaway of one internal battery cell that is centrally located within the ESS.

Once the thermal runaway is initiated, the mechanism used to create thermal runaway is shut off or stopped and the ESS is subjected to a one hourobservation period. Fire cannot propagate during this observation period or result in an explosion. © TESLAGroupAllrights reserved. FIRE PROTECTION DESIGN for battery racks, which ensures the fire resistance of the cover for at least 60 minutes. This security is intended to enable the fire suppression system to limit the spread of fire and extinguish it, as well as to ensure sufficient time for the arrival of rescue services. © TESLAGroupAllrights reserved. FIRE PROTECTION EQUIPMENT for monitoring the status of batteries and unwanted situations. Photoelectric Smoke Sensor The principle of using a light source and a photosensitive sensor arranged so that the rays from the light source do not normally fall onto the photosensitive sensor. When smoke particles inter the light path, some of the light is scattered by reflection and refraction onto the sensor. The light signal is processed and used to convey an alarm condition when it meets preset criteria. In the normal case, the light from the light source on the left shoots straight across and misses the sensor. When smoke enters the chamber, however, the smoke particles scatter the lightand some amount of light hits the sensor.

Heat Sensor The working principle of temperature detector is to detect fire by using heat sensitive elements. In the initial stage of fire, on the one hand, a lot of smoke is produced, on the other hand, a lot of heat is released in the combustion process, and the ambient temperature rises sharply. The thermal element in the detector has physical change, so that the temperature signal is converted into electrical signal, and the alarm processing is carried out. © TESLAGroupAllrights reserved. FIRE PROTECTION EQUIPMENT for monitoring the status of batteries and unwanted situations. PhotoelectricSmokeDetector Series65 A Smokedetectorworkson thelight scatterprincipleand isidealfor applicationswhereslowburningor smoulderingfiresare likely. Respondswellto slowburning, smoulderingfires Unaffectedby windor atmoshperic preessure High-sensitivityoption HeatDetector Series65 A Heatdetectormonitorstemperatureby usinga dualthermistornetwork providinga voltageoutput proportional to theexternalairtemperature. The ninedectorsinsideare designedto suite variety of operatingconditions. Theratioof theresistanceof the thermistorsismonitoredelectronically and analarm isinitiatediftheratio exceedsthefactorypre-set level. © TESLAGroupAllrights reserved.

FIRE CONTROL PANEL as an important element for ensuring the monitoring of the condition of all equipment for detecting and extinguishing a possible fire. The Sigma A-XT Releasing Fire Control Panel is a conventional fire control panel and releasing system. The fire control panel provides connections for Detection Zones, Notification Appliance Circuits (NACs),Releasing Circuits, Relay Outputs, Status Units and AUX 24 V power. Models of the Sigma A-XT ReleasingFire Control Panel provide 115 VAC or 230 VAC operation in modes for regulated and special applicationenvironments. SystemisconnectedwithmasterBMS (batterymanagement system) and local controllersystem(LCC –AMOS) to provideallindicationaboutstatus in batteryracks. © TESLAGroupAllrights reserved. FIRE CONTROL PANEL as an important element for ensuring the monitoring of the condition of all equipment for detecting and extinguishing a possible fire. The Sigma A-XT Releasing Fire Control Panel provides functions for: The zone testing function provides an automatic reset of zones in alarm. The NAC delay function suspends the NAC output and permits alarms to be verified before premises are evacuated. The NAC reactivation function provides an alarm resound. NAC Reactivation Voltage Free Relay Contacts Voltage free relay contacts are provided for local control and signalling.

The releasing delay function suspends the releasing signal for up to 60 seconds. The releasing signal provides identification of the pending extinguishant release and the flow of extinguishant during the releasing process. The low pressurefunction provides releasing agent monitoring using a pressure switch to measure low pressure conditions. The abort function provides suspension of the releasing count-down whencontacts on an external-momentary-switch are closed. The deactivation time function provides a delay setting to control the output quantity of the releasing agent. The manual only mode disables the releasing operation using automatic detection devices. First and second stage relay contacts are provided to trigger equipment outside the system. Pre-discharge and release warnings are provided with separate audible tones and frequencies. These operating characteristics allow the two warnings to be differentiated on the fire control panel. The supervisory signal function provides audible and visual indications onthe fire control panel and on external status units. This mode also operatesthe output of the TROUBLE RELAY. All supervisory conditions are non-latching. The power source failure function provides immediate audible and visualindications at the fire control panel. The audible and visual indications arealso provided on external status units.

Status Units can operate the output of the TROUBLE RELAY. status units are provided with a limited set of indicators and functions compared with those provided on the Sigma A-XT Releasing Fire Control Panel. Status unit functions are non-configurable on the fire control panel. Zone Testing NAC Delay Releasing Delay Releasing Signal Low Pressure Abort Deactivation Time Manual Only Mode Relays Warnings Supervisory Power Source Interconnected © TESLAGroupAllrights reserved. FIRE CONTROL PANEL as an important element for ensuring the monitoring of the condition of all equipment for detecting and extinguishing a possible fire. Certificate: © TESLAGroupAllrights reserved. AEROSOL FIRE SYSTEM It ensures the elimination of the formation and spread of fire as well as its elimination. Introduction FireawayLLC aerosol fire suppression systems are designed for total flooding applications in accordance with established design criteria. Application methods, designcriteria, and limitations are contained within this manual. In any situation not specificallycovered by this manual, the application and installation of the system must be inaccordance with the appropriate and/or applicable standards. All installations must meetthe requirements of the local authority having jurisdiction.

Fire suppression systems produce a highly effective, technologically advancedfire suppression agent with unique operational and flow characteristics. Since these systems are designed and installed in a manner different than other suppression systems with which the system designer may be familiar, the system designer must become thoroughly familiar with the design criteria contained in this manual in order toproperly input design data and parameters. There are a number oflimitations, whichmust be observed in entering parameters if accurate results are to be obtained. Fire suppression systems combine an environmentally safe fire suppressionagent, specially developed components, and highly effective detection devices for rapid agent application. The resulting timely suppression of fire reduces property damage andproducts of combustion to the lowest possible levels. These systems are electricallyactivated, are extremely compact, and totally eliminatethe expensive pressure vessels,nozzles, and distribution piping associated with other fire suppression systems. Stat-X®fire suppression systems offer significant weight and space savings. Generators arestrategically placed throughout the hazard area and are designed to discharge in sevento thirty sixseconds, depending on the size of the generator.

The agent produced is a Potassium based aerosol with particle sizes primarily in the ≤ 2micron size. The aerosol has the flow characteristics of a gas and has been determinedto be non-toxic to humans when exposed for short periods at recommended designconcentrations. © TESLAGroupAllrights reserved. AEROSOL FIRE SYSTEM It ensures the elimination of the formation and spread of fire as well as its elimination. Certificated © TESLAGroupAllrights reserved. AEROSOL FIRE SYSTEM It ensures the elimination of the formation and spread of fire as well as its elimination. Extinghuisingagent The aerosol produced upon activation of the FireawayLLC system is composed of ultra-fine particles of Potassium salts with secondary inert gases. Potassium salts have long been recognized as one of the most effective fire suppression agents available. It suppresses fire by a combination of chemical and physical mechanisms similar tothe Halons without any negative effect on the environment. Because of the aerosol's ultra-fine particle size (≤ 2 micron) there is a dramatic increase in the surface area interaction between the agent and the fire. Potassium based aerosol has been shown in numerous tests to be a highly effective alternative to other extinguishing agents. Unlike gaseous agents the aerosol does not decompose in the presence of firenor doesit extinguish by oxygen deprivation.

System s listed under the United States Environmental Agency (EPA) Significant New Alternatives Program (SNAP) for unoccupied and normally unoccupied areas. The aerosol is considered non-toxic to humans when applied in normal design concentrations necessary to extinguish most fires; however, there is a high obscuration factor and certain safety restrictions should be observed when applying and handling the generators. Exposure to the aerosol should be limited and unnecessary exposure to the particulate should be avoided. Exposure to the aerosol is generally of less concern than is exposure to the decomposition products of a fire. Toxicity Tests conducted by the Institute of Biophysics (Department of Public Health and Medicine Russian Federation) as well as others have shown that the aerosol does not present a health hazard due to limited accidental exposure at normal design concentrations. Exposures under five minutes are normally considered safe. Gas byproducts are several times less than that allowable for automobile airbag systems. While the components of the aerosol are not considered toxic at normal concentration levels, ingestion of the ultra-fine particulate may cause short-term discomfort and unnecessary exposure should be avoided. Tests have shown no long- term negative effects from exposure to the aerosol.

In additionthe aerosol has a high obscuration factor as noted above. © TESLAGroupAllrights reserved. AEROSOL FIRE SYSTEM It ensures the elimination of the formation and spread of fire as well as its elimination. Systems shall only be applied in unoccupiable & normally unoccupied spaces –which complies with using battery energy storage system. Cleanliness The ultra-fine aerosol discharge remains in suspension for an extended period of timeand can be easily vented by a fan or air handling; system. Minor amounts of aerosol, which may have settled on the floor or other horizontal surfaces, can be easily vacuumed or wiped clean. Settled particulate is minor and is much less than the particulate produced by the decomposition products of the fire. Storage Aerosolgenerator is sealed with a non-permeable membrane and has been evaluated for temperature cycling (-40°C to + 54°C) and humidity (up to 95% relative humidity). Accelerated aging tests have shown the generator's charge maintains its viability for 10 years. Safetydatasheet These devices are sealed and present no ecological hazards. The aerosol produced upon ignition has no global warming potential and an ozone depletion potential = 0. Toxic by-products of combustion are extremely low. Main by-products are listed below with 15-minute TWA values for a maximum 100g/m3 concentration in a hermetically sealed volume.

© TESLAGroupAllrights reserved. AEROSOL FIRE SYSTEM It ensures the elimination of the formation and spread of fire as well as its elimination. Componentdescription Aerosol generator is comprised of an insulated stainless steelhousing containing the aerosol forming compound, initiator, insulating medium, and internal elements for oxidation and cooling of the aerosol stream prior to its discharge from the unit. The initiator utilizes a secure two-wire connector for electrical activation and a proprietary thermal detector for thermal activation. Each generator is sealed and utilizes a non- permeable membrane to maintain the internal integrity of the unit even in humid and high temperature environments. © TESLAGroupAllrights reserved. SYSTEM ACTIVATION in the event of an incident. When only a detector is triggered, it’s defined as first-level fire alarm. When both of the twodetectors are triggered, it’s defined as second-level fire alarm. At the same time, the aerosol fire extinguishing system interacts with the battery management system (BMS). When the BMS detects a first-level fire alarm, the alarm cabinet quits the state of operating and send signlto the EMS. When the BMS detects a second- level fire alarm,theaerosol of the alarm cabinet is released, with all ofthe electrical cabinets in the system out of operation and signlreported to the EMS.

Wiring diagram of protection system © TESLAGroupAllrights reserved. CONTROL SYSTEM It ensures the monitoring of all important Bess parameters on the basis ofwhich the evaluation can be detected all potential problems before the emergence of dangerous situations. DATAGATHERING&ANALYTICS Thecollectionofthemaximumpossible datafromBESS-realtimeis monitoredover200signalsfromalldevices Evaluationofcollecteddataandtheirimmediateevaluationfor monitoringcompliancewithKPI-keyperformanceindicators Alldeviationsorexceedancesareimmediatelysignaledtoboththe clientandourservicedepartment toensurethefastest possible analysisandavailabilityofBESS REAL-TIMECONTROL* Systemmanagementbasedonminimizationofownconsumption andlosses(totalround-tripefficiency) Managementtoensuremaximumbattery life Possibilitytosetfunctionalitiesalwaysaccordingtocurrentneeds Thesystemis managedonthe basisofTOTALCOSTOF ENERGY -ie. realizesfromthe selectedmultifunctionalitiesthosethat will bring maximum benefits PREDICTION&FUTURE* Asystem that isable toself-learn basedon historical data and courses Thesystemisabletoimplementpredictionbasedon machine- learningalgorithmsoffutureneeds &systemusageso thatthe batteryisalways intheoptimalstate ofcharge/ discharge to maximize its use © TESLAGroupAllrights reserved. Q&A to answermore specificquestions.

How quick is reaction time of fire alarm system? Usuallywithin 1 second, in better cases, the first and second level fire faults can be detected within 300ms. How quick after detection is provided release of suppression system? There is a 30-second delay to prevent false alarms or to provide time for manual actions. Its provided aerosol system required periodic maintenance or change of aerosol regularly? The service life of the aerosol is 10 years, and maintenance and replacement are required every 10 years. Inaddition, it is recommended to inspect the temperature and smoke sensors every 12 months. If the indicator light flashes every few seconds, itis in normal working condition. In case of fire, is it safe to open battery rack? It is not recommended to open the cabinet. During the short time when the fire extinguishing agent is activated, the battery cell that has undergone thermal runaway may have already burned or produced an open flame, but its temperature and internal chemical properties are still unstable. If the cabinet door is hastily opened, external oxygen will rush into the cabinet, which may cause a reignition risk. Is there any procedure for fire department how to provide in case of fire incident? If a fire is triggered, it is recommended to perform safety maintenance and inspection after 24 hours of inactivation.

If the fire flame does not disappear, activate the waterbasedfire extinguishing system directly. It is not safe to suddenly open the cabinetwithout any inactive time after extinguishing the fire. In case of fire is thereautomatic disconnection of DC power to battery rack? When a fire occurs, the DC circuit of the cabinet will be disconnected, and the contactor will be opened. However, the auxiliary power supply will not be disconnected, and the power supply is provided externally, which needs to be disconnected externally from the AC power supply. © TESLAGroupAllrights reserved. Q&A to answermore specificquestions. Is aerosol supposed to just control fire or it can provide fire suppression? Fireextinguishingisprovided. After releasing of aerosol –when only some part (cells / module) is effected–how it canbe proceedto use battery rack again –just some cleaning of aerosol or whats requirementsaftersuchincident? It is not recommended to use it again without submitting the situation at the time of the projectfor evaluation. Aerosol fire extinguishing is a space-level release, not for a siglepack. If timelysuppression is carried out, after the technical evaluation of the product, it will not affect otherpacks and other packs can still be used, but this pack cannot be used.

After battery cell is affected is possible still to use battery module or must be replaced all? At least replace the pack. © TESLAGroupAllrights reserved. AC AMOS BESS DC EMS ESS FSS HVAC Alternatingcurrent Advancedmicrogridoptimizationsystem Batteryenergystoragesystem Directcurrent Energy management system Energy storagesystem Firesafetysystem Thermalmanagement system © TESLAGroupAllrights reserved. TESLAGroupa. s. Nastrži 1702/65, Nusle, 140 00 Praha CzechRepublic © TESLA GroupAllrights reserved. Specificationsubject maychange without notice.