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Reference Information
This glossary is designed for homeowners who are curious about renewable energy but are not yet ready to think of themselves as full energy "Prosumers." It uses plain language, keeps technical detail light, and explains why each term matters in planning and decision-making for residential renewable energy adoption.
While it contains links to other pages on this platform, you should understand that one may press the browser Back button to return to a prior web page.
Energy Bill
Sample Energy Bill
Summary
The monthly statement from your utility that shows how much electricity you used and what you paid.
Narrative
Your energy bill is where most homeowners first see the impact of efficiency upgrades or solar. It lists your usage (usually in kilowatt‑hours) and the rate you pay, along with fees and taxes. Understanding this bill is the first step toward taking control of your home’s energy, regardless of whether you ever install solar or batteries
What's Actually on Your Electric Bill?
If you've ever stared at your electric bill wondering why it's not just one simple number, you're not alone.
Here's what's really going on behind those line items.
The part you'd expect: paying for the power itself
Most of your bill covers the electricity you actually used — this is sometimes called the "supply" or "generation" charge, and it's priced per kilowatt-hour (kWh). Some utilities also charge more once you use a certain amount in a month, or more during peak hours like weekday evenings when everyone's home cooking dinner and running the AC.
The part that gets it to your house
Electricity doesn't teleport from the power plant to your outlet — it travels over transmission lines and then through local distribution wires, poles, and transformers to reach you. Utilities charge separately for this journey: a transmission charge for the long-haul trip, and a distribution charge for the last-mile delivery to your neighborhood.
The part you pay no matter what
Even if you used zero electricity all month, you'd still see a customer charge (sometimes called a basic service charge). This flat fee covers the cost of keeping you connected to the grid — reading your meter, maintaining the account, and so on.
The fine-print extras
This is where bills get confusing. Depending on where you live, you might see:
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A fuel adjustment charge, which passes along swings in what the utility pays for fuel or wholesale power
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Clean energy or efficiency fees, which fund state-required renewable energy or energy-saving programs
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Infrastructure riders, which help pay for things like grid upgrades or smart meter rollouts
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A small low-income assistance fee, which helps other customers who need help paying their bills
Taxes and local fees
Like most things you buy, electricity is taxed. You'll also often see a franchise fee (paid to your city for the utility's use of public streets) and sometimes a small fee that funds your state's utility regulator.
Credits, if you're lucky
If you have solar panels and/or any other renewable energy solutions, you might see a net metering credit for extra power you sent back to the grid. And if you're on a budget billing plan (paying a flat amount year-round), you'll periodically see a true-up adjustment reconciling what you paid against what you actually
These credits are what you seek and want to optimize in your Prosumer journey.
Please Note: You will want to be intentional in reconciling these credits to the energy production reports from your Smart Home or to the stock reports provided for by your renewable energy solution(s).
Bottom line: your bill isn't just "electricity" — it's electricity, plus the cost of the wires and infrastructure that deliver it, plus a handful of fees and programs mandated by your state or city.
Kilowatt
kW
Also Kilowatt Hour, or kWh
Image Caption//Eye Catching Pattern
Summary
A nearly universal starting point for measuring energy
Narrative
A kilowatt-hour is a unit that measures how much electrical energy is used over time.
Let's break it down:
First, a kilowatt (kW) is 1,000 watts
A kilowatt-hour is how much energy you use when you run something that uses 1 kilowatt (1,000 watts) for one hour
Related
A 100-watt bulb running for 10 hours would use 1 kilowatt-hour
(because 100 watts × 10 hours = 1,000 watt-hours = 1 kWh)
Here are some helpful analogies and examples ...
Device charging:
Charging your phone typically uses about 0.005 kWh per charge. This means you could charge your phone 200 times with 1 kWh
Home activities:
Running a window AC unit for 1 hour ≈ 1 kWh
Using a microwave for 1 hour ≈ 1.2 kWh
Playing video games on a gaming console for 10 hours
≈ 1 kWh
The energy in 1 kWh could:
Toast about 160 slices of bread
Run a ceiling fan for about 24 hours
Power a TV for about 10 hours
You can typically see the power requirements because it should be written on the device itself, either on a label or stamper printing.
Megawatt
MW
Also Megawatt Hour, or MWh
An example of a Megawatt of energy usage
Summary
A megawatt (MW) is 1,000 kilowatts ...
Narrative
A megawatt-hour is 1,000 kilowatt-hours, or 1,000,000 watt-hours.
It's such a large unit that it's typically used for:
- Measuring industrial power use
- Tracking power plant production
- Calculating city power consumption
.. but that number means little until you tie it to something people actually experience. The most consumer-friendly way to explain it is through scale comparisons: how many homes, appliances, or EVs a megawatt could power at once.
Examples
Here are some relatable examples of what 1 megawatt-hour can do ...
Home Usage:
- Power an average American home for about 1 month
- Run an electric oven continuously for about 40 days
- Keep a central air conditioner running for about 10 days straight
Electric Vehicles:
- Charge about 12-14 Tesla Model 3 cars from empty to full
- Drive an electric car approximately 3,000 miles (roughly the distance from New York to Los Angeles)
Entertainment & Technology:
- Power a large movie theater for about 2-3 days
- Keep 1,000 laptops running for about 10 hours
- Run a gaming PC continuously for about 500 days
Industrial Examples:
- Run an industrial freezer for about 2 weeks
- Power a small factory for one day
- Keep a medium-sized office building running for about 1-2 days
Fun Fact: A typical wind turbine, when running at full capacity, produces about 2-3 MWh per hour!
Gigawatt
GW
Also Gigawatt Hour, or GWh
An example of a Megawatt of energy usage
Summary
A Gigawatt (GW) is 1,000,000 kilowatts ...
Narrative
A gigawatt sounds like a power-plant number. But it can also be a people number: millions of household energy upgrades working together to create the equivalent of a major power plant
Examples
One gigawatt is enough electricity to power a city the size of Denver, connecting hundreds of thousands of homes into one shared clean-energy system.
One gigawatt is roughly what it takes to run a nuclear power plant, or about half of Hoover Dam at full output.
Renewable Energy
Summary
Energy that comes from natural sources that quickly renew themselves, such as sunlight and wind.
Narrative
Renewable energy is derived from resources like the sun, wind, flowing water, geothermal heat, and sustainable biomass that are constantly replenished. This contrasts with fossil fuels like coal and natural gas, which take millions of years to form and emit more pollution. For homeowners, renewables usually show up as rooftop solar, community solar subscriptions, or green power options from the utility.
The overwhelming, compelling justification is that, in simplified terms, the incremental cost of producing renewable energy is close to zero for an extended period of time. Long term, and in a world of rational economic actors, this is economically and functionally compelling.
Examples
Examples of More Popular Renewable Energy "Solutions"
Solar, or Photo Voltaic ("PV")
Wind
Hydro
Geothermal
Hydrogen
Battery Power
Biomass
Solar Energy
Powered By The Sun's Energy
Some visual examples
Summary
Electricity or heat produced from sunlight, usually with rooftop solar panels.
Narrative
Solar panels produce DC power, but homes and the utility grid use alternating current (AC). The inverter does this conversion and often provides monitoring so you can see how much energy your system produces. For most homeowners, it is “behind the scenes,” but it is critical to safe and reliable solar operation.
Interesting Notes:
Here's a number that stops most people cold: the sunlight hitting the Earth in a single hour carries more energy than the entire human race uses in a whole year — every light bulb, every factory, every car, every furnace, combined. Not close, either. One hour of sun outpaces 365 days of humanity's total energy appetite. And if you zoom out further, a single year of sunlight delivers more energy than all the oil, coal, natural gas, and uranium left on the planet — combined. We're not short on energy. We're short on ways to catch it.
Solar power facilities in home are typically warrantied for 25 years.
The process for solar power have dropped 70-90% since 2010
Inverter
DC to AC
Summary
The box that converts solar panel or and (Direct Current) power into the type of electricity your home and the grid can use.
Narrative
Solar panels produce DC power, but homes and the utility grid use alternating current (AC). The inverter does this conversion and often provides monitoring so you can see how much energy your system produces. For most homeowners, it is “behind the scenes,” but it is critical to safe and reliable solar operation.
Home, grid, and participation concepts
Grid‑tied Renewable Energy System
Summary
A renewable energy that works with the existing utility grid instead of replacing it.
Narrative
In a grid‑tied system, your home still connects to the utility, which means you can send excess solar power out and draw power back when you need it. This is the most common type of residential solar because it reduces cost and complexity. It also opens the door to programs like net metering and time‑of‑use optimization.
Related
The Energy Grid
Off-Grid
Grid‑tied Renewable Energy System
Off-Grid Renewable Energy Home
Energy Independence
Summary
A home that operates independently from the utility grid and makes all of its own electricity.
Narrative
Off‑grid homes rely on a combination of solar panels, batteries, and sometimes backup generators to meet their energy needs without any utility connection.
They are more common in remote areas or among homeowners who highly value energy independence. Because they require more equipment and careful design, they are usually a later stage beyond most pre‑prosumer customers.
Living Off-Grid requires education, detailed planning, consistent and intentional daily effort, and evaluating tradeoffs and lifestyle adjustments.
Related
The Energy Grid
Grid-tied Renewable Energy System
Smart Home
Money, billing, and participation programs ...
Net Metering
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Getting Financial Credits
Offset Energy Costs
Summary
A billing system that credits you when your solar panels send extra electricity back to the grid.
Narrative
With net metering, your meter can effectively “run backward” when your solar production is higher than your usage, creating credits on your bill. These credits can offset electricity you use from the grid at other times, such as at night. Rules vary by state and utility, but net metering is often key to the financial value of rooftop solar.
This arrangement can change over time, might be grandfather, and vary by utility and region.
Related
ROI
Economic Justification
Community Solar
Join and or Subscribe
Summary
A way to benefit from solar by subscribing to a shared project instead of putting panels on your own roof.
Narrative
Community solar projects build a larger solar array in a central location and assign portions of its output to many customers. You remain a utility customer, but you get credits on your bill based on your share of the project’s production. This is ideal for renters, condo owners, or anyone whose roof is not a good fit for solar.
Related
ROI
Economic Justification
Time-of-use ("TOU") Rates
Potential Savings based on Usage Patterns
Summary
Electricity pricing that changes depending on the time of day.
Narrative
Under TOU rates, electricity costs more during busy “peak” periods and less during quieter times. If you can run some appliances, like dishwashers or EV charging, during off‑peak hours, you can save money. Solar and batteries can also help shift when you draw power from the grid, making TOU a natural bridge toward more active energy behavior.
Related
ROI
Economic Justification
Home Energy Use and Efficiency
Energy Efficiency
Summary
Using less energy to get the same comfort, services, and lifestyle at home.
Narrative
Energy efficiency means using less energy to provide the same service, such as keeping a home warm or lighting a room, without reducing comfort or performance. It is often the least expensive way to meet energy needs while reducing environmental impact
Energy efficiency includes improvements like better insulation, efficient HVAC systems, LED lighting, and ENERGY STAR appliances. These upgrades reduce waste, lower bills, and often make rooms more comfortable. Most experts recommend tackling efficiency before or alongside solar, because it reduces the size and cost of any system you later install
Interesting Note:
At its core, this is about being intentional about saving costs and, at best, increasing one's energy security specifically by investing in renewable energy solution to their economic advantage.
Home energy audit
Summary
A check‑up of your home that finds where you are wasting energy and how to fix it
Narrative
A professional auditor or program examines things like air leaks, insulation, windows, and heating and cooling equipment. You receive a report with recommended improvements, estimated savings, and sometimes incentives or rebates you can claim. For “pre‑prosumer” homeowners, an audit is a low‑risk way to start engaging with their energy use
Interesting Note:
Your energy audit is best completed by an entity not involved in a sales pursuit!
Tools that individuals can use for personal investigations of specific energy issues at one's home.
Sample of an energy audit report.
Home energy management (HEM)
Summary
Tools and practices that help you monitor and control how your home uses energy
Narrative
Home energy management can include smart meters, smart plugs, smart thermostats, and software that tracks your usage patterns. These tools show where and when you use the most energy and help you automate savings, such as pre‑cooling your home before peak hours. HEM is a gentle path into “acting like a prosumer” without needing to know technical details.
One key components is regular inspection of your Utility bills and (as is available) production reports related to your various renewable energy solutions.
Interesting Note:
Life Cycle Management processes (referenced in this resource)
Smart Home (link)
Prosumer Related Terms
Home Battery / Battery Storage
Summary
A large battery that stores extra solar energy for use later, like at night or during outages.
Narrative
When your solar panels make more electricity than your home needs, that surplus can charge your home battery instead of flowing straight back to the grid. You can then use the stored energy when prices are higher or when the grid fails. Batteries increase your control and resilience and are a key step toward becoming an active energy participant
Interesting Note:
Battery Storage (more details)
Smart thermostat
Summary
A connected thermostat that can automatically adjust heating and cooling to save energy and maintain comfort.
Narrative
Smart thermostats learn your schedule, react to changing conditions, and can often be controlled from your phone. Many utilities offer rebates for them because they help reduce demand at peak times. For homeowners, they are an easy, non‑technical entry into the world of smart energy management.
Interesting Note:
Smart Home (more details)