Everything the utility never explained, in one line each.
A fifteen-minute window in which your surplus is listed, bid on, and settled. There are ninety-six a day.
The lowest price per kWh you will sell at. Buyers bid above it; anything below it stays with you.
The small box that clips onto your inverter or battery, measures your surplus, and lists it on the market.
The local slice of the grid your home is connected to. You sell to buyers in your region, and each region has its own live price.
The box that turns the DC power from your panels or battery into the AC power your home and the grid use. The gateway plugs into it.
A kilowatt-hour: the unit electricity is sold in. One kWh runs a kettle for about half an hour, or a fridge for a day.
Your utility's scheme for crediting power you export. The market gives that power a better buyer; unsold blocks fall back to net metering.
Power you make or store that your home is not going to use. It is the only thing the gateway ever lists.