No jargon. No sales pitch. Just a clear explanation of how sunlight becomes savings on your electric bill, from panels to paycheck.
Solar panels are made up of photovoltaic (PV) cells, typically silicon-based semiconductors. When sunlight hits these cells, photons knock electrons loose, creating a flow of direct current (DC) electricity.
A single solar panel produces a modest amount of power (300–400 watts). Homes typically need 10–25 panels to cover their electricity needs, depending on usage and roof size.
Your home runs on alternating current (AC), not the DC electricity panels produce. An inverter, either a central string inverter or individual microinverters on each panel, converts DC to AC automatically.
This conversion happens instantly and continuously throughout the day. Modern inverters are 97–99% efficient, so almost none of your solar energy is wasted in conversion.
During the day, your panels often produce more electricity than your home uses. That surplus flows back to the utility grid, and your meter spins backward, earning you credits on your bill. This is called net metering.
At night or on cloudy days, you draw from the grid as normal, using up those credits. At the end of each month (or year, depending on your utility), you only pay for the net difference, often $0 or close to it.
A home battery (like the Tesla Powerwall or Enphase IQ Battery) stores your excess solar energy instead of sending it to the grid. You then use that stored power at night or during an outage.
Batteries make the most financial sense in states with poor net metering policies, in areas with frequent outages, or for homeowners who want true energy independence.
Your ideal system size depends on three things: your average monthly electricity usage (in kWh), your roof's sun exposure (peak sun hours per day), and the efficiency of the panels you choose.
A solar installer will pull 12 months of your utility bills and use satellite imagery to design a system that offsets 90–100% of your usage. The Solar Store connects you with local installers who do this analysis for free.
The federal solar tax credit lets you deduct 30% of your total system cost from your federal taxes. On a $20,000 system, that's $6,000 back. Many states add additional incentives on top.
Most homeowners break even on their solar investment in 6–10 years. After that, the electricity your panels produce is essentially free for the remaining 15–20 years of the system's life.
Straight answers to the questions we hear most.
Yes, solar panels still generate electricity on cloudy days, typically at 10–25% of their rated capacity. Germany, one of the cloudiest countries in the world, is a top solar adopter.
Standard grid-tied systems automatically shut off during outages (for grid worker safety). If you want backup power, you need a battery or a specific hybrid inverter setup.
Most panels carry a 25-year performance warranty guaranteeing they'll still produce at least 80% of their original output. Many panels last 30–40 years with minimal degradation.
South-facing roofs are ideal in the northern hemisphere, but east- and west-facing roofs can still be very productive. A good installer will evaluate your specific roof and shade conditions.
Many states have a solar property tax exemption, meaning your home's increased value from solar won't raise your property tax bill. Check your state's policy for specifics.
Now that you know how it works, get a free custom quote and see exactly what solar looks like for your home.
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