If you can’t explain it simply, you don’t understand it well enough.
Learn
Welcome
Progress
—of 9
— of 57 beats completed
You can now explain
The path
01–09
01
The Sun and the Home
How the sun’s path and the seasons shape the energy available to a home.
02
The Grid
How electricity gets from the power plant to the house.
03
The Electric Panel
How the meter measures energy and the panel distributes it through the home.
04
Power vs. Energy
The difference between kilowatts and kilowatt-hours, and when each matters.
05
Solar Without Battery
How a solar system powers the home and sends surplus to the grid.
06
Solar with Battery
How a battery stores solar surplus and keeps power on in an outage.
07
Utility Billing Basics
How to read a utility bill: usage, rates, and what solar offsets.
08
Net Energy Metering
What NEM is and how it credits solar exports at the retail rate, kilowatt-hour for kilowatt-hour.
09
Net Billing Tariff
What NBT is and how it values exports at avoided cost — in dollars, not kilowatt-hours.