S
- Salable Coal
- Salable Natural Gas
- Sales
- Sales for Resale
- Sales for Resale (Electric)
- Sales to End Users
- Sales Type
- Sales Volume (Coal)
- Salt Gradient Solar Ponds
- Sample (Coal)
- Schedule
- Scheduled Outage
- Scheduling Coordinators
- Scoop Loading
- Screenings
- Seam
- Seasonal Energy Efficiency Ratio (SEER)
- Seasonal Energy Efficiency Ratio (SEER)
- Seasonal Pricing
- Seasonal Rates
- Seasonal Units
- Seasoned Wood
- Secondary Heating Equipment
- Secondary Heating Fuel
- Sector
- Securitization
- Securitize
- Selective Absorber
- Self-Generator
- Seller Type
- Semianthracite
- Semiconductor
- Separate Metering
- Separative Work Unit (SWU)
- Separative Work Unit (SWU)
- Septic Tank
- Series Connection
- Series Resistance
- Service Area
- Service Provider
- Service Well
- Shaft Mine
- Shakes/Shingles
- Shale
- Shale Gas
- Shallow Pitting
- Shell Storage Capacity
- Short Circuit
- Short Circuit Current
- Short Purchases
- Short Term Sales
- Short Ton (st)
- Short-term Debt or Borrowings
- Short-term Purchase
- Shortwall Mining
- Shrinkage
- Shut In
- Shut-in Royalty
- Shutdown Date
- Sidetrack Drilling
- Siding
- Silicon
- Silt
- Silt, Culm, Refuse Bank, or Slurry Dam Mining
- Single Crystal Silicon
- Single Crystal Silicon (Czochralsky)
- Single Purpose Project
- Single-circuit Line
- Single-Family Housing Unit
- Sinter
- Site Characterization
- Site Energy
- Site-specific Information DSM Program Assistance
- Slope Mine
- Slot (Well Slot)
- Sludge
- Slurry
- Slurry Dam
- Small Pickup Truck
- Small Power Producer (SPP)
- Small Power Producer (SPP)
- Small-scale Solar
- Sodium Lights
- Sodium Silicate
- Sodium Tripolyphosphate (STPP)
- Solar Cell
- Solar Constant
- Solar Cooling
- Solar Declination
- Solar Dish
- Solar Energy
- Solar Parabolic Trough
- Solar Pond
- Solar Power Tower
- Solar Radiation
- Solar Spectrum
- Solar Thermal Collector
- Solar Thermal Collector, High Temperature
- Solar Thermal Collector, Low-Temperature
- Solar Thermal Collector, Medium-Temperature
- Solar Thermal Collector, Special
- Solar Thermal Direct-Use Energy
- Solar Thermal Panels
- Solar Thermal Parabolic Dishes
- Solvent Refined Coal (SRC)
- Sorghum Oil
- Sour Gas
- Source Material
- Source Rock
- Soybean Oil
- Space Heating
- Spark Spread
- Special Collector
- Special Contract Rate Schedule
- Special Naphthas
- Special Nuclear Material (SNM)
- Special Purpose Rate Schedule
- Specular Reflectors
- Speculative Resources (Coal)
- Speculative Resources (Uranium)
- Spent Fuel
- Spent Fuel Disassembly Hardware
- Spent Liquor
- Spillway
- Spinning Reserve
- Split System
- Split Tails
- Spontaneous Combustion of Coal
- Spot Market (Natural Gas)
- Spot Market (Uranium)
- Spot Price
- Spot Purchases
- Spot-Market Price
- Stability
- Stabilization Lagoon
- Stack
- Stand-alone Generator
- Standard Contract
- Standard Fluorescent Lighting
- Standard Industrial Classification (SIC)
- Standard Industrial Classification (SIC)
- Standby Charge
- Standby Electricity Generation
- Standby Facility
- Standby Heat Loss
- Standby Service
- Startup Test Phase of Nuclear Power Plant
- Startup/Flame Stabilization Fuel
- State
- State Permit/License/Mine Number
- State Severance Taxes
- Station (Electric)
- Station Use
- Steam
- Steam (Purchased)
- Steam Boiler
- Steam Coal
- Steam Electric Power Plant (Conventional)
- Steam Expenses
- Steam for Heating/Cooling
- Steam from Other Sources
- Steam or Hot Water Radiators or Baseboards
- Steam or Hot-Water System
- Steam Transferred-Credit
- Steam Turbine
- Still Gas
- Stock Change
- Stock in Energy Context
- Storage Agreement
- Storage Capacity
- Storage Hydroelectric Plant
- Storage Site
- Storm Door
- Storm or Multiple Glazing
- Storm Window
- Stranded Benefits
- Stranded Costs
- Strategic Petroleum Reserve (SPR)
- Strategic Petroleum Reserve (SPR)
- Stratigraphic Test Well
- Stratosphere
- Stream-flow
- Strip Mine
- Strip Mining (Surface)
- Strip or Stripping Ratio
- Stripper Well
- Styrene (STY)
- Subbituminous Coal
- Subcompact/Compact Passenger Car
- Subdivision
- Submetered Data
- Subsidiary
- Substation
- Subtransmission
- Sulfur
- Sulfur Dioxide (SO2)
- Sulfur Dioxide (SO2)
- Sulfur Hexafluoride (SF6)
- Sulfur Hexafluoride (SF6)
- Sulfur Oxides (SOx)
- Sulfur Recovery (SR)
- Summer and Winter Peaking
- Sunk Cost
- Superconductivity
- Supervisory Control and Data Acquisition (SCADA)
- Supplemental Gas
- Supplemental Gaseous Fuels Supplies
- Supply
- Supply Source
- Supply, Petroleum
- Support Equipment and Facilities
- Supporting Structure
- Surface Drilling Expenses (Uranium)
- Surface Mine
- Surface Mining Equipment
- Surface Mining Methods
- Surface Rights
- Surplus Energy
- Suspended Rates
- Swamp Coolers (Evaporative Coolers)
- Switching Station
- Synthetic Natural Gas (SNG)
- Synthetic Natural Gas (SNG)
- System (Electric)
- System (Gas)
- System Interconnection
- System Operator (Electric)