2,400+ Definitions
HVAC GLOSSARY
Every HVAC term, acronym, and industry phrase — defined in plain English.
Solar Panel Degradation
Solar panel degradation refers to the gradual decline in photovoltaic…
Solar Panel Efficiency
Solar panel efficiency is the percentage of sunlight that a…
Solar Panel NOCT
Nominal Operating Cell Temperature (NOCT) measures how hot a solar…
Solar Panel STC
Standard Test Conditions (STC) represent the standardized laboratory environment used…
Solar Panel Warranty
Solar panel warranties are manufacturer guarantees covering defects, materials, and…
Solar Panel Wattage
Solar panel wattage, or rated power capacity, measures the maximum…
Solar Parallel Connection
Solar parallel connection links photovoltaic modules positive-to-positive and negative-to-negative, increasing…
Solar Payback Period
The solar payback period is the time required for cumulative…
Solar Permit
A solar permit is the official authorization issued by local…
Solar Plus Storage
Solar Plus Storage combines rooftop solar panels with battery storage…
Solar Pool Collector
A solar pool collector is the primary component of a…
Solar Pool Heater
A solar pool heater is a system that uses solar…
Solar PPA
A Solar Power Purchase Agreement (PPA) is a long-term contract…
Solar Production Data
Solar production data encompasses the measured electrical output and performance…
Solar Production Meter
A solar production meter measures the electrical output generated by…
Solar Property Value
Solar property value refers to the measurable increase in home…
Solar Racking
Solar racking refers to the structural mounting systems that securely…
Solar Radiant Heating
Solar radiant heating delivers warmth from solar thermal collectors through…
Solar Rapid Shutdown
Solar rapid shutdown is a safety system that de-energizes all…
Solar Ready Electrical Panel
A Solar Ready electrical panel is a service panel pre-configured…
Solar Ready Home
A Solar Ready home is a residence designed and constructed…
Solar Ready HVAC
Solar Ready HVAC refers to heating and cooling equipment designed…
Solar Rebate
A solar rebate is a direct cash payment offered by…
Solar Renewable Energy Certificate
A Solar Renewable Energy Certificate (SREC) is a tradable financial…
Solar ROI
Solar ROI (Return on Investment) is the percentage return generated…
Solar Roof Tile
A solar roof tile is a photovoltaic module shaped and…
Solar Self Consumption
Solar self consumption is the practice of using solar energy…
Solar Series Connection
Solar series connection links photovoltaic modules positive-to-negative to increase voltage…
Solar Shingle
A solar shingle is a small-scale photovoltaic module designed to…
Solar Space Heating
Solar space heating uses solar thermal collectors to capture sunlight…
Solar Storage Tank
A solar storage tank is an insulated vessel that stores…
Solar String
A solar string is a series of photovoltaic modules electrically…
Solar Tax Credit
A solar tax credit is a government incentive that allows…
Solar Thermal Array
A solar thermal array is a group of interconnected solar…
Solar Thermal Cooling
Solar thermal cooling uses solar heat to power cooling systems…
Solar Thermal Fluid
Solar thermal fluid, also called heat transfer fluid or HTF,…
Solar Thermal System
A solar thermal system captures heat directly from sunlight to…
Solar Tracking System
Solar tracking systems automatically adjust panel orientation throughout the day…
Solar Water Heater
A solar water heater uses thermal energy from the sun…
Solar Wire
Solar wire is specially formulated electrical conductor rated for direct…
Soldering
Soldering is the process of joining copper tubing and fittings…
Solenoid Valve
A solenoid valve is an electromechanical device that uses an…
Solid Desiccant
Solid desiccant materials are porous minerals or composite substances that…
Sound Attenuator
A sound attenuator is a lined duct section or silencer…
Sound Baffle
A sound baffle is an engineered acoustic element designed to…
Sound Level Meter
A sound level meter is a calibrated electronic instrument that…
Source Control
Source control eliminates or reduces indoor air pollutants at their…
Source Energy
Source Energy represents the total raw energy consumed at power…