Already a subscriber?
MADCAD.com Free Trial
Sign up for a 3 day free trial to explore the MADCAD.com interface, PLUS access the
2009 International Building Code to see how it all works.
If you like to setup a quick demo, let us know at support@madcad.com
or +1 800.798.9296 and we will be happy to schedule a webinar for you.
Security check
Please login to your personal account to use this feature.
Please login to your authorized staff account to use this feature.
Are you sure you want to empty the cart?
Advanced Energy Design Guide for Multifamily Buildings: Achieving Zero Energy, 2022
- Advanced Energy Design Guidefor Multifamily Buildings [Go to Page]
- Contents
- Acknowledgments
- Abbreviations and Acronyms
- Foreword
- Sidebars [Go to Page]
- Grid Considerations for Zero Energy Buildings
- New Financial Models Driving Renewable Energy in Multifamily Projects
- Nonvisual Benefits of Daylighting and Electric Lighting
- Occupant Strategies for Energy Efficiency
- Electric Vehicle Charging Stations
- Chapter 1 - Introduction [Go to Page]
- GOALS OF THIS GUIDE
- ZERO ENERGY DEFINITION
- BENEFITS OF A ZERO ENERGY BUILDING [Go to Page]
- SOUND FISCAL MANAGEMENT
- OCCUPANT SATISFACTION
- ENVIRONMENTAL STEWARDSHIP
- SCOPE
- DEVELOPING THE GUIDE
- HOW TO USE THIS GUIDE
- REFERENCES AND RESOURCES
- Case Study - Energy Modeling for the Multifamily AEDG
- Case Study - Batik Apartments
- Chapter 2 - Principles for Success [Go to Page]
- IMPROVING BUILDING PERFORMANCE
- MOVING TO ZERO ENERGY
- PRINCIPLES FOR SUCCESS [Go to Page]
- DEVELOP THE CULTURE AND MINDSET
- IDENTIFY A CHAMPION
- COLLABORATE AND ITERATE
- HIERARCHY OF DECISION MAKING
- ADAPTING TO FUTURE NEEDS [Go to Page]
- TECHNOLOGY
- RESILIENCY
- GRID ALIGNMENT
- RETROFIT READY
- OTHER FACTORS
- REFERENCES AND RESOURCES
- Case Study - Beach Green Dunes II
- Chapter 3 - A Process for Success [Go to Page]
- SET THE GOAL [Go to Page]
- DETERMINE THE EUI TARGET
- IMPLEMENT THE EUI TARGET
- ESTABLISH THE FINANCIAL MODEL
- SELECT A PROJECT DELIVERY METHOD
- INCORPORATE THE GOAL IN THE PROJECT REQUIREMENTS
- HIRE THE PROJECT TEAM
- CONFIRM AND VERIFY [Go to Page]
- CONFIRM THE EUI
- CONFIRM ON-SITE RENEWABLE ENERGY POTENTIAL
- CALCULATE THE ENERGY BALANCE
- INCENTIVIZE THE TEAM TO IMPROVE
- COMMISSION THE BUILDING
- EDUCATE AND ENGAGE BUILDING OCCUPANTS
- VERIFY AND TRACK AFTER OCCUPANCY
- REFERENCES AND RESOURCES
- Case Study - Betances Residence
- Chapter 4 - Leveraging Analysis to Drive Success [Go to Page]
- INTRODUCTION
- DESIGN-PHASE STRATEGIES [Go to Page]
- CONCEPT PHASE
- SCHEMATIC DESIGN PHASE
- DESIGN DEVELOPMENT PHASE
- CONSTRUCTION DOCUMENTS PHASE
- CONSTRUCTION PHASE
- OPERATIONS PHASE
- SPECIFIC ANALYSIS STRATEGIES [Go to Page]
- CLIMATE
- FORM AND SHAPE
- FENESTRATION
- SHADING
- DAYLIGHTING
- ENVELOPE
- INFILTRATION
- LIGHTING
- USER BEHAVIOR
- EQUIPMENT SCHEDULES AND LOADS
- HEATING AND COOLING LOADS
- MECHANICAL SYSTEMS COMPARISONS
- RENEWABLE ENERGY SYSTEMS
- REFERENCES AND RESOURCES
- Case Study - Stack House Apartments
- Chapter 5 - How-To Strategies [Go to Page]
- BUILDING AND SITE PLANNING [Go to Page]
- OVERVIEW
- SITE DESIGN STRATEGIES [Go to Page]
- BP1 Select Appropriate Building Sites
- BP2 Optimize Building Siting Combined with Landscaping and Site Features
- BP3 Infill Strategies
- BUILDING MASSING [Go to Page]
- BP4 Optimize Surface Area to Volume Ratio
- BP5 Programmatic Design Strategies
- BP6 Climate-Responsive Building Shapes
- BP7 Minimize and Shade Surfaces Receiving Direct Solar Radiation for Cooling
- BP8 Optimize Building for Natural Ventilation
- BUILDING ORIENTATION [Go to Page]
- BP9 Optimize Orientation
- PLANNING FOR RENEWABLE ENERGY [Go to Page]
- BP10 General Guidance for Renewable Energy Planning
- BP11 Roof Form
- BP12 Determine Required Roof Area for PV
- BP13 Maximize Available Roof Area
- BP14 Roof Durability and Longevity
- BP15 Roof Safety
- BP16 Maintain Solar Access
- B17 Alternatives to Roof-Mounted PV
- PARKING CONSIDERATIONS [Go to Page]
- BP18 Parking Garages
- REFERENCES
- ENVELOPE [Go to Page]
- OVERVIEW
- THERMAL PERFORMANCE OF OPAQUE ASSEMBLIES [Go to Page]
- EN1 Building Insulation General Guidance
- EN2 Insulation of Roofs
- EN3 Insulation of Mass Walls—Concrete and Masonry
- EN4 Insulation of Steel-Framed and Wood-Framed Walls
- EN5 Insulation of Below-Grade Walls
- EN6 Insulation of Mass Floors
- EN7 Insulation of Framed Floors
- EN8 Insulation of Slab-on-Grade Floors—Unheated and Heated
- EN9 Thermal Mass General Guidance
- EN10 Internal Thermal Mass
- EN11 External Thermal Mass
- EN12 Roofing General Guidance
- EN13 Cool Roofs and Warm Roofs
- EN14 Green Roofs
- THERMAL PERFORMANCE OF FENESTRATION AND DOORS [Go to Page]
- EN15 Building Fenestration General Guidance
- EN16 Window-to-Wall Ratio
- EN17 Select the Right Glazing
- EN18 Window U-Factor
- EN19 Solar Heat Gain Coefficient
- EN20 Visible Transmittance
- EN21 Acoustics and Impact on Energy
- EN22 Spandrel Panels
- EN23 Operable Fenestration
- EN24 Glazed Entrance Doors
- AIR LEAKAGE CONTROL [Go to Page]
- EN25 Air Leakage Control General Guidance
- EN26 Air Leakage for Fenestration and Doors
- EN27 Whole-Building Air Sealing
- EN28 Establish a Maximum Air Leakage Rate Target
- THERMAL BRIDGING CONTROL [Go to Page]
- EN29 Thermal Bridging Control General Guidance
- EN30 Roof Penetrations
- EN31 Photovoltaic Supports
- EN32 Roof Curbs
- EN33 Roof Parapets
- EN34 Walls
- EN35 Thermally Broken Attachments
- EN36 Wall Openings
- EN37 Canopies and Sunshades
- EN38 Foundations and Floors
- REFERENCES AND RESOURCES
- LIGHTING DESIGN [Go to Page]
- OVERVIEW
- GENERAL GUIDANCE [Go to Page]
- LD1 Daylighting Design Principles
- LD2 Electric Lighting Design Principles
- LIGHTING DESIGN PROJECT-PHASE TASKS [Go to Page]
- LD3 Predesign
- LD4 Schematic Design
- LD5 Design Development
- LD6 Construction Documents
- LD7 Construction Administration
- DESIGN STRATEGIES [Go to Page]
- LD8 Lighting Power Allowances
- LD9 Lighting Controls
- LD10 Light-Colored Interior Finishes in Common and Amenity Spaces
- LD11 Light-Emitting Diodes (LEDs)
- L12 LED Color Characteristics
- LD13 Connected Lighting
- RESIDENTIAL FLOOR SAMPLE LAYOUTS [Go to Page]
- LD14 Space-Specific General Guidance
- LD15 Typical Dwelling Unit
- LD16 Typical Residential Floor Corridor and Elevator Lobby and Stairway
- COMMON AREAS AND COMMERCIAL SPACE SAMPLE LAYOUTS [Go to Page]
- LD17 Main Lobby
- LD18 Office Spaces
- LD19 Retail Spaces
- LD20 Fitness Room
- LD21 Community Room
- LD22 Other Spaces
- LD23 Twenty-Four-Hour Lighting
- LD24 Parking Garage
- LD25 Exterior—Parking Lots and Drives
- LD26 Exterior—Walkways, Stairs, and Entries
- LD27 Exterior—Decorative Façade Lighting
- DAYLIGHTING DESIGN CONSIDERATIONS [Go to Page]
- LD28 Building Footprint and Façade Orientation
- LD29 Space Programming
- LD30 Fenestration Function
- LD31 Daylight Redirection
- LD32 Shading and Glare Control
- LD33 Fenestration Details
- LIGHTING CONTROL DESIGN CONSIDERATIONS [Go to Page]
- LD34 Separately Control Electric Light Distribution, Intensity, and Spectrum
- LD35 Use an Occupant-Engaged Control Strategy
- LD36 Photosensors
- LD37 Vacancy/Occupancy Sensors
- LD38 Use Information Available from the Lighting Control System
- LD39 Task Lighting (Plug-in Table Lamps)
- EXTERIOR LIGHTING DESIGN CONSIDERATIONS [Go to Page]
- LD40 Lighting Zones
- LD41 Luminaire BUG Ratings
- REFERENCES AND RESOURCES
- PLUG LOADS AND POWER DISTRIBUTION SYSTEMS [Go to Page]
- OVERVIEW
- GENERAL GUIDANCE [Go to Page]
- PL1 Energy-Efficient Equipment
- PL2 Plug Load Controls
- RESIDENTIAL SPACES [Go to Page]
- PL3 Control Strategies
- PL4 Cooking Appliances
- PL5 Dishwashers
- PL6 Clothes Washers
- PL7 Heat Pump Dryers and Dryer Alternatives
- PL8 Refrigerators
- PL9 Fireplaces and Gas Logs
- PL10 Entertainment and Home Office Appliances
- COMMON AREAS AND COMMERCIAL SPACES [Go to Page]
- PL11 Control Strategies
- PL12 Office Equipment
- PL13 Audiovisual Equipment
- PL14 Security and Fire Systems
- BUILDING PROCESS LOADS [Go to Page]
- PL15 Elevators
- POWER DISTRIBUTION SYSTEMS [Go to Page]
- PL16 Rightsizing Power Distribution Systems
- REFERENCES AND RESOURCES
- DOMESTIC WATER HEATING [Go to Page]
- OVERVIEW
- SYSTEM DESCRIPTIONS [Go to Page]
- WH1 System Options
- WH2 Water-Heating Sources
- WH3 Indoor Air-Source Electric Heat Pump Water Heater (Single Package)
- WH4 Outdoor Air-Source Electric Heat Pump Water Heater (Split System)
- WH5 Sewer Heat Recovery Heat Pump Electric Water Heater
- WH6 Condensing Gas-Fired Storage Water Heater
- WH7 Ground-Coupled Heat Pump Electric Water Heater
- WH8 System Type Selection Criteria
- DESIGN STRATEGIES [Go to Page]
- WH9 Cogeneration
- WH10 Reducing Overall Water Consumption
- WH11 Properly Sizing Equipment
- WH12 Equipment Efficiency
- WH13 Minimizing System Losses
- WH14 Distribution Piping Design
- WH15 Tank Storage Design
- WH16 Solar Hot-Water Systems
- REFERENCES AND RESOURCES
- HVAC SYSTEMS AND EQUIPMENT [Go to Page]
- OVERVIEW [Go to Page]
- HV1 Human Comfort for Residential Buildings
- SYSTEM DESCRIPTIONS [Go to Page]
- HV2 Systems for Building Common Spaces
- HV3 System Descriptions for Dwelling Units
- DEDICATED OUTDOOR AIR SYSTEM (DOAS) [Go to Page]
- HV4 System Overview—DOAS
- HV5 Sizing a DOAS for Dehumidification
- HV6 Air Delivery for Zone-Level Ventilation
- HV7 Discharge Air Temperature Control for DOAS
- HV8 Exhaust Air Energy Recovery Options for DOAS
- HV9 Advanced Sequence of Operation for DOAS
- HV10 Part-Load Dehumidification Control
- HV11 Ventilation Air Rate
- HV12 Exhaust Air Systems
- HV13 Kitchen Exhaust Hoods
- HV14 Energy Recovery Frost Control
- HV15 Indirect Evaporative Cooling
- SYSTEM A—AIR-SOURCE HEAT PUMP MULTISPLIT [Go to Page]
- HV16 Description—System A
- HV17 Sizing Indoor Units with Outdoor Units—System A
- HV18 Refrigerant Safety—System A
- HV19 Ambient Condition Considerations—System A
- SYSTEM B—WATER-SOURCE HEAT PUMP [Go to Page]
- HV20 Description—System B
- HV21 Types of Ground-Source Heat Pump Systems
- HV22 The Ground as an Annual Thermal Battery
- HV23 Hybrid Ground-Coupled Systems
- HV24 Water Piping and Pumping Strategies
- SYSTEM C—FOUR-PIPE HYDRONIC SYSTEM [Go to Page]
- HV25 Description—System C
- HV26 Chilled-Water Equipment—System C
- HV27 Hot-Water Equipment—System C
- HV28 Variable Primary Flow
- HV29 Two-Pipe versus Four-Pipe Considerations
- HV30 Ambient-Condition Considerations for Air-Source Chillers—System C
- HV31 Radiant Heating and Cooling Success Factors—System C
- GENERAL GUIDANCE FOR ALL SYSTEM TYPES [Go to Page]
- HV32 Fan Selection
- HV33 Energy-Efficient Electric Motors
- HV34 Rightsizing Equipment
- HV35 Decentralized Systems and Multifamily Issues
- HV36 Thermal Zoning
- HV37 System-Level Control Strategies
- HV38 HVAC Maintenance in Multifamily Buildings
- HV39 Commissioning Systems and Equipment
- HV40 Noise Control
- HV41 Natural Ventilation and Free Cooling
- THERMAL MASS [Go to Page]
- HV42 Thermal Mass Overview
- HV43 Passive versus Active Thermal Mass
- REFERENCES AND RESOURCES
- RENEWABLE ENERGY [Go to Page]
- OVERVIEW [Go to Page]
- RE1 Common Terminology
- DESIGN STRATEGIES [Go to Page]
- RE2 System Design Considerations
- RE3 Sizing Renewables for the Zero Energy Goal
- RE4 Battery Energy Storage
- RE5 Mounting Options
- RE6 Interconnection Considerations
- RE7 Utility Considerations
- RE8 Utility Rates
- IMPLEMENTATION STRATEGIES [Go to Page]
- RE9 Purchasing Options
- RE10 Purchasing the System
- RE11 Negotiating Procurement
- RE12 Commissioning the System
- REFERENCES AND RESOURCES
- Case Study - St. Peter Residential Apartments
- Appendix A - Envelope Thermal Performance Factors [Go to Page]
- REFERENCES
- Appendix B - International Climatic Zone Definitions [Go to Page]
- DETERMINING CLIMATE ZONES [Go to Page]
- MARINE (C) ZONE DEFINITION
- DRY (B) ZONE DEFINITION
- HUMID (A) ZONE DEFINITION
- REFERENCES
- Tables [Go to Page]
- Table 3-1 Target Energy Use Intensity (EUI)
- Table 5-1 Summary of Strategies and Recommendations
- Table 5-2 (BP12) PV Percent Area of Gross Floor Area
- Table 5-3 (EN1) Envelope Construction Factors
- Table 5-4 (EN1) Insulation Applications by Envelope Component
- Table 5-5 (EN17) Fenestration and Door Assembly Criteria
- Table 5-6 (EN19) SHGC Multipliers for Permanent Projections
- Table 5-7 (LD8) Interior Lighting Power Densities (LPDs)
- Table 5-8 (LD9) Lighting Controls for Dwelling Units and Common Amenity Spaces
- Table 5-9 (LD9) Lighting Controls for Common Areas
- Table 5-10 (LD11) LED Specifications
- Table 5-11 (PL5) ENERGY STAR Criteria for Residential Dishwashers
- Table 5-12 (PL6) ENERGY STAR Criteria for Clothes Washers
- Table 5-13 (PL8) Recommended Energy Efficiency of Refrigerators
- Table 5-14 (WH8) Recommended Domestic Water-Heating System Types by Climate Zone
- Table 5-15 (WH10) Recommended Criteria for Faucets and Sprayers (EPA n.d.-b)
- Table 5-16 (WH11) Calculation Procedure for Estimating Domestic Water Heating Sizing (DOE n.d.)
- Table 5-17 (WH12) Gas Water Heater Performance
- Table 5-18 (WH12) Indoor Air-Source Water-to-Water Heat Pump Performance Requirements
- Table 5-19 (WH12) Outdoor Air-Source Water-to-Water Heat Pump Performance Requirements
- Table 5-20 (WH12) Water-to-Water Heat Pump Performance Requirements
- Table 5-21 (HV3) Recommended HVAC System Type by Climate Zone
- Table 5-22 (HV3) Minimum Efficiency Recommendations by System Type
- Table 5-23 (HV4) Recommendations for DOASs
- Table 5-24 (HV8) Recommended Energy Recovery Type by Climate Zone
- Table 5-25 (HV9) DOAS Unit Control Modes (ASHRAE 2017b)
- Table 5-26 (HV14) Example Frost Point for Energy (with 75% Total Effectiveness and 70°F Space Conditions)
- Table 5-27 (HV16) Recommendations for ASHP Multisplit
- Table 5-28 (HV20) Recommendations for Zone Terminal Systems with DOASs
- Table 5-29 (HV25) Recommendations for Hydronic Fan-Coils or Radiant Panels
- Table 5-30 (HV40) Recommended Background Sound Levels by Space Type (ASHRAE 2019h)
- Table A-1 Walls, Wood Framing, 16 in. on Center (O.C.)—Recommended Construction Factors
- Table A-2 Walls, Wood Framing, 24 in. on Center (O.C.)—Recommended Construction Factors
- Table A-3 Walls, Metal Framing, 16 in. on Center (O.C.)—Recommended Construction Factors
- Table A-4 Walls, Metal Framing, 24 in. on Center (O.C.)—Recommended Construction Factors
- Table A-5 Mass Walls Above Grade—Recommended Construction Factors
- Table A-6 Roofs—Recommended Construction Factors
- Table A-7 Non-Heated Slab-on-Grade—Recommended Construction Factors
- Table B-1 International Climatic Zone Definitions (ASHRAE 2021a)
- Figures [Go to Page]
- Figure 1-1 Typical Multifamily Floor Plans: (a) Residences and (b) Lobby
- Figure 1-2 EUI Comparison by Climate Zone: (a) Site and (b) Source
- Figure 1-3 Multifamily Prototype Building
- Figure 2-1 Integrated Design Process for a Zero Energy Building
- Figure 3-1 Where the Zero Energy Goal Gets Lost
- Figure 3-2 Climate Zone Map for U.S. States and Counties
- Figure 3-3 Building EUI by Number of Stories: (a) for Residential Floors Only and (b) for Total Building including Commercial First-Floor Spaces
- Figure 3-4 Energy Balance Diagram
- Figure 3-5 Exterior Doorway with Blower Door Installed
- Figure 3-6 Smartphone Energy Dashboard Display
- Figure 4-1 Energy End-Use Comparison: (a) Tampa, Florida, and (b) Rochester, Minnesota
- Figure 4-2 Climate-Based Impact of Ventilation Strategies on Hourly Annual Indoor Humidity Levels
- Figure 4-3 Solar Incidence Comparison
- Figure 5-1 (BP6) Letter Building Shapes
- Figure 5-2 (BP7) Fenestration Shading Examples
- Figure 5-3 (BP11) Solar Panel Layout Options
- Figure 5-4 (BP13) Roof-Mounted PV System
- Figure 5-5 (BP17) Roof Canopy PV System over Amenity Space
- Figure 5-6 (EN10) Internal Exposed Thermal Mass
- Figure 5-7 (EN18) High-Performance Thermally Broken Fiberglass Frames
- Figure 5-8 (EN30) Roof Drain Insulation
- Figure 5-9 (EN30) Plumbing Vent Insulation
- Figure 5-10 (EN33) Parapet Insulation
- Figure 5-11 (EN33) Through-Wall Scupper Insulation
- Figure 5-12 (EN34) Shelf Angle Installation at Floor Edge
- Figure 5-13 (EN34) Wall Cladding Attachment
- Figure 5-14 (EN34) Wall Masonry Attachment—Cladding Gravity Support
- Figure 5-15 (EN34) Wall Masonry Attachment—Cladding Lateral Support
- Figure 5-16 (EN34) Precast Exterior Wall with Interior Insulation
- Figure 5-17 (EN35) Wall to Balcony
- Figure 5-18 (EN35) Wall to Balcony—Wood-Frame Construction
- Figure 5-19 (EN35) Exterior Wall above Roof
- Figure 5-20 (EN36) Window System to Opaque Wall Connection: (a) Plan at Jamb and (b) Section at Sill
- Figure 5-21 (EN36) Window System to Opaque Wall Connection for Precast Wall Connection
- Figure 5-22 (EN36) Exterior Door Insulation Installation
- Figure 5-23 (EN38) Wall Transition with Insulation Continuous to Foundation
- Figure 5-24 (EN38) Wall Transition with Insulation
- Figure 5-25 (LD15) Typical Dwelling Unit: (a) Sample Design and (b) Illustrative Photograph
- Figure 5-26 (LD16) Typical Residential Floor Corridor, Elevator Lobby, and Stairway Sample Design
- Figure 5-27 (LD17) Main Lobby: (a) Sample Design and (b) Illustrative Photograph
- Figure 5-28 (LD18) Office Sample Design
- Figure 5-29 (LD20) Fitness Room Sample Design
- Figure 5-30 (LD21) Community Room: (a) Sample Design and (b) Shared Dining Area Illustrative Photograph
- Figure 5-31 (LD24) Parking Garage Sample Design
- Figure 5-32 (LD31) (a) Optical Louvers and (b) Microstructure Applied Film
- Figure 5-33 (PL1) Example EnergyGuide Label
- Figure 5-34 (PL4) Induction Cooktop Process
- Figure 5-35 (PL7) Heat Pump Dryer Technology Schematic
- Figure 5-36 (PL16) Typical Power Distribution
- Figure 5-37 (WH1) Central Domestic Hot-Water System Example (Prior to Insulation of Piping)
- Figure 5-38 (WH8) Impact of Domestic Water-Heating-System Type on Building EUI in Climate Zone 5A
- Figure 5-39 (WH14) Central Domestic Water-Heating Distribution System Layout with Multiple-Pass Heat Pump
- Figure 5-40 (WH14) Central Domestic Water-Heating-Distribution System Layout with Single-Pass Heat Pump
- Figure 5-41 (HV1) Comfort Zone Showing Impact of Increased Air Speed Across the Body
- Figure 5-42 (HV1) Comfort Zone Showing Impact of Outdoor Air Temperature
- Figure 5-43 (HV4) Example Exhaust Air Energy Recovery Configurations
- Figure 5-44 (HV6) Air Delivery for Zone-Level Ventilation
- Figure 5-45 (HV9) DOAS Unit Control Modes
- Figure 5-46 (HV12) Exhaust Air Measurement
- Figure 5-47 (HV16) System A—ASHP Multisplit
- Figure 5-48 (HV20) WSHP with Boiler/Closed-Circuit Cooler
- Figure 5-49 (HV20) WSHP with Exterior Ground-Coupled Heat Exchanger
- Figure 5-50 (HV25) Four-Pipe Hydronic System
- Figure 5-51 (HV40) Typical Noise Paths for Interior-Mounted HVAC Units
- Figure 5-52 (HV41) Outdoor Air Balance-Point Temperatures for Different Envelope Performance Levels
- Figure 5-53 Declining Costs of Solar Energy
- Figure 5-54 (RE1) Typical PV AC System Diagram
- Figure 5-55 (RE1) Typical PV Single-Line Diagram
- Figure 5-56 (RE4) Battery Storage (far left and middle left), Solar Energy Management Units (middle right), and Inverters (far right)
- Figure 5-57 (RE5) Ground-Mounted PV System
- Figure 5-58 (RE5) Canopy-Mounted PV System
- Figure 5-59 (RE5) Aerial View of Roof and Parking Canopy PV Systems
- Figure 5-60 (RE5) Off-Grid, Solar Powered, Solar Tracking Electric Vehicle Charger [Go to Page]