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Powerwall 2 AC Permitting and Inspection Support for Authorities Having Jurisdiction (Ahjs)

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Powerwall 2 AC Permitting and Inspection Support for Authorities Having Jurisdiction (Ahjs) Powerwall 2 AC Permitting and Inspection Support for Authorities Having Jurisdiction (AHJs) Nov 03, 2017 Rev. 1.3 TABLE OF CONTENTS 1. Introduction ................................................................................................................................................ 3 Example Layout ......................................................................................................................................................................................... 3 2. Specifications ............................................................................................................................................. 4 Powerwall Electrical Specifications ................................................................................................................................................. 4 Powerwall Environmental Specifications ..................................................................................................................................... 4 Powerwall Mechanical Specifications ............................................................................................................................................ 4 Backup Gateway Electrical Specifications .................................................................................................................................. 5 Backup Gateway Environmental Specifications ....................................................................................................................... 5 Backup Gateway Mechanical Specifications .............................................................................................................................. 5 3. Certifications and Standards ................................................................................................................ 5 4. Frequently Asked Questions ................................................................................................................ 6 General Safety ............................................................................................................................................................................................ 6 Design Considerations ........................................................................................................................................................................... 8 System Operation .................................................................................................................................................................................... 9 5. Common System Configurations ........................................................................................................ 11 Partial Home Backup (Backup of Selected Loads) ................................................................................................................ 11 Whole Home Backup – Load Side Connection ........................................................................................................................ 12 6. Inspection Guide ...................................................................................................................................... 13 General Requirements ........................................................................................................................................................................... 13 Wiring Methods ........................................................................................................................................................................................ 13 Overcurrent Protection and Wire Sizing ..................................................................................................................................... 13 Disconnecting Means .............................................................................................................................................................................14 Labeling ........................................................................................................................................................................................................14 2 Powerwall 2 AC Permitting and Inspection Support 1. Introduction This document provides technical information about Powerwall, Tesla’s home battery solution. The information provided in this document may be used by Authorized Resellers and Tesla Certified Installers as part of the permitting process with their respective Authority Having Jurisdiction (AHJ). Tesla Powerwall is a state-of-the-art battery system intended for residential and light commercial applications. It enables the storage of energy from the grid or renewable sources, such as solar power, that can then be used at night. Powerwall can also provide backup power in case of a grid outage. Powerwall is an assembly that consists of lithium-ion battery cells, an isolated DC/DC converter, an integrated AC inverter and a liquid thermal management system. The battery cells inside Powerwall are the components closest to being a conventional battery; however, the installer or user is never exposed to these cells since they are electrically and physically isolated from contact by maintenance personnel or homeowners. For backup applications, the Backup Gateway is used to isolate Powerwall from the grid and facilitate the powering of backed up loads. The Backup Gateway is a separate piece of equipment from the Powerwall, and is not directly connected to Powerwall via power cables. The Gateway is connected to the Powerwall via communication cables and thus functions together with the Powerwall as a complete system. Within the Backup Gateway enclosure is a microprocessor controlled power contactor, inclusive of line- and load-side voltage sensing and current measurement. Example Layout Powerwall 2 AC Permitting and Inspection Support 3 2. Specifications Powerwall Electrical Specifications Energy1 13.5 kWh AC Voltage (Nominal) and 120 V, 208 V, 240 V: 24 A Maximum Continuous Current 100 V, 200 V, 220 V, 230 V: 25 A Frequency (Nominal) 50/60 Hz Real Power, max continuous 5 kW (charge and discharge) Real Power, peak (10 s) 7 kW (discharge only) Apparent Power, max continuous 5.8 kVA (charge and discharge) Apparent Power, peak (10 s) 7.2 kVA (discharge only) Power Factor (full-rated power) +/- 0.85 Overvoltage Category Category III Max Supply Fault Current 10 kA Max Output Fault Current 32 A RMS Round Trip Efficiency (Beginning of Life)1 90% 1 Values provided for 25°C (77°F), 3.3 kW charge/discharge power. Powerwall Environmental Specifications Operating Temperature2 -20°C to 50°C (-4°F to 122°F) Operating Humidity (RH) Up to 100%, condensing Storage Conditions (up to 12 months) -20°C to 30°C (-4°F to 86°F) Up to 95% RH, non-condensing State of Energy (SoE): 25% initial Maximum Altitude 3000 m (9843 ft) Noise Level @ 1 m < 40 dBA at 30°C (86°F) Enclosure Type NEMA 3R Ingress Rating IP67 (battery and power electronics) IP56 (wiring) Wet Location Rating Yes Pollution Degree Rating PD3 Seismic Rating AC156, IEEE 693-2005 (high) 2 Performance may be de-rated in extreme ambient temperatures. Powerwall Mechanical Specifications Height 1150 mm (45.3 in) Width 755 mm (29.7 in) Depth 155 mm (6.1 in) Weight 125 kg (276 lbs) 4 Powerwall 2 AC Permitting and Inspection Support Backup Gateway Electrical Specifications Disconnect Current 200 A Overcurrent Protection Breaker3 100-200 A Overvoltage Category Category III Fault Current Withstand Rating 10 kAIC AC Meter Revenue grade Service Rating Suitable for Use as Service Equipment 3 Circuit breaker required for installation at service entrance Backup Gateway Environmental Specifications Operating Temperature -20°C to 50°C (-4°F to 122°F) Operating Humidity (RH) Up to 100%, condensing Maximum Altitude 3000 m (9843 ft) Enclosure Type NEMA 3R Ingress Rating IP44 Pollution Degree Rating PD3 Backup Gateway Mechanical Specifications Height 740 mm (29.1 in) Width 378 mm (14.9 in) Depth 129 mm (5.1 in) Weight 16.4 kg (36 lbs) 3. Certifications and Standards The Tesla Powerwall is certified and tested to the standards listed in the following table. If physical certificates are required, please email [email protected] with your request. Safety UL 1642, UL 1741, UL 1973, UL 9540, UN 38.3, IEC 62109-1, IEC 62619, CSA C22.2.107.1 Grid Standards Worldwide compatibility Emission FCC Part 15 Class B, ICES 003 Environmental RoHS Directive 2011/65/EU, WEEE Directive 2012/19/EU, Battery Directive 2006/66/EC Seismic AC156, IEEE 693-2005 (high) Powerwall 2 AC Permitting and Inspection Support 5 4. Frequently Asked Questions General Safety Are Powerwall and the Backup Gateway listed equipment? Yes. The Powerwall and the Gateway are listed to the applicable product standards by a Nationally Recognized Testing Laboratory (NRTL). How is Powerwall different from the lithium-ion batteries found in small consumer electronics? Since 2003, Tesla has developed significant expertise around usage and safe deployment of lithium-ion batteries in electric vehicles. That depth of knowledge is leveraged in Powerwall’s technology. In addition, consumer electronics are not always subjected to the rigorous testing required for certification and listing to applicable safety standards. What safety features does Powerwall include to avoid thermal runaway? Powerwall complies with UL 1973 and IEC 62619 requirements for propagation resistance to single cell thermal runaway. UL 1973 includes an internal fire test for this reason, which ensures that
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