How solar works

How solar works,
in plain English.

A solar panel turns sunlight straight into electricity, using cells made of silicon. No moving parts, no fuel, just sunlight.

Installer carrying a solar panel across a roof on Cape Cod

Step by step

From your roof to your meter, in six steps.

  1. Your panels make power

    Solar panels generate electricity from the sun.

  2. The inverter converts it

    DC power becomes the AC power your home runs on.

  3. Your home uses it first

    Solar powers your house before anything else.

  4. The extra goes to the grid

    Any power you don’t use is sent back to the utility.

  5. You earn credits

    Your surplus earns credits with the utility, ready when you need them.

  6. You use them later

    At night or in winter, when your system makes less.

Net metering

Your summer pays for your winter.

Net metering is how your utility credits you for the solar power you send back to the grid. Every extra kWh your system makes is exported, and the utility keeps track of the credits for you. They don’t expire: they roll forward, so what you bank from March to September covers October to February.

You stay connected to the grid the whole time. That’s the point, because it’s what makes net metering work.

March to September: banking credits October to February: using them

Rows of black solar panels on a Hopkinton, MA roof against a blue sky
  • At night

    Nothing is produced, so you use the credits you banked in the day. No battery needed.

  • On a cloudy day

    Panels still produce, just less.

  • When it snows

    Production drops until the snow slides off or melts, and the panels’ angle and dark surface usually speed that up.

Myths vs facts

What people get wrong about solar.

Myth: “I need a battery to have power at night.”

Fact: No. Net metering credits cover the night.

Myth: “I’ll need a second electrical panel.”

Fact: No, not for solar.

Myth: “If I need a new roof, solar shingles are the better option.”

Fact: Solar shingles cost far more per watt than conventional panels. On a typical system the gap can be tens of thousands of dollars.

Myth: “Panels need regular cleaning.”

Fact: They have a self-cleaning surface. Rain takes care of seasonal pollen and dust.

See what your roof can do.

We’ll look at your roof and your bills, then size a system to cover about 100 to 105% of what you use in a year.

No savings guarantees. No “free solar”. Just an honest number.

Get a free quote
617-687-3424