B
- Backup Fuel
- Backup Generator
- Backup Power
- Balancing Authority (Electric)
- Balancing Item
- Barrel
- Barrel (b)
- Barrel of Oil Equivalent (BOE)
- Barrels Per Calendar Day (BPCD)
- Barrels Per Day (b/d)
- Barrels per Stream Day (b/sd)
- Barrels per Stream Day (BPSD)
- Base Bill
- Base Gas
- Base Load
- Base Load Capacity
- Base Load Plant
- Base Period
- Base Rate
- Baseboard Heater
- Basis Point (BP)
- Battery Electric Vehicle (BEV)
- Benzene
- Bi-fuel Vehicle
- Bilateral Agreement
- Bilateral Energy Transaction
- Billing Period
- Billion Cubic Feet (BCF)
- Biobutanol
- Biodiesel (B100)
- Biofuels
- Biogas
- Biogenic
- Biogenic Emissions
- Biointermediates
- Biomass
- Biomass Gas
- Biomass Waste
- Biomass-based Diesel Fuel
- Bitumen
- Bituminous Coal
- Black Liquor
- Black Lung Benefits
- Blast Furnace
- Blast-furnace Gas
- Blending Components
- Blending Plant
- Block-Rate Structure
- Blowout Preventer Control System (BLS)
- Boiler
- Boiler Fuel
- Boiling Water Reactor (BWR)
- Boiling-water Reactor (BWR)
- Bonded Petroleum Imports
- Bone Coal
- Book Value
- Booked Costs
- Borderline Customer
- Bottled Gas
- Bottled Gas, LPG, or Propane
- Bottom Ash
- Bottom-Hole Contribution
- Bottoming Cycle
- Branded Product
- Break-even Cutoff Grade
- Breccia
- Breeder Reactor
- Breeze
- British Thermal Unit (BTU)
- Btu Conversion Factor
- Btu Per Cubic Foot (Btu/ft³)
- BTX (Benzene, Toluene, Xylene)
- Budget Plan
- Building Shell (Envelope) DSM Program
- Building Shell Conservation Feature
- Built-in Electric Units
- Bulk Power Transactions
- Bulk Sales
- Bulk Station
- Bulk Terminal
- Bundled Utility Service (Electric)
- Bunker Fuels
- Burn Days
- Burnup (Nuclear Fuel)
- Bus
- Butane (C4H10)
- Butylene (C4H8)
- Buy-back Oil
- Bypassed Footage
- Byproduct