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Basics

Every WattBarn guide filed under Basics. Practical, plain-English walkthroughs, ranked on what actually matters.

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An aerial view of a suburban neighborhood with rooftop solar arrays visible on many of the houses along a curving street lined with treesLatest in Basics
Basics

Are Solar Panels Bad for the Environment?

Are solar panels bad for the environment? This briefing covers the manufacturing footprint, energy payback time, materials, water use, and end of life.

· 23 min readRead the guide →
A two story house with cream siding and a solar array on the front roof slope, glowing in warm late afternoon lightBasics

Are Solar Panels Worth It? Pros, Cons, Payback

Are solar panels worth it? This briefing weighs the financial, environmental, and practical case together, with the honest downsides and who should skip it.

· 23 min read
A two-story house with tan siding and a composition shingle roof, an array of dark solar modules mounted high on the roof plane and catching a sun flare, under a clear blue skyBasics

Ballasted Solar Racking Explained

Ballasted solar racking anchors a flat roof array with weight rather than bolts, and this explainer covers the engineering, the trade-offs, and when it fits.

· 28 min read
Close-up of a residential rooftop solar panel array with a white inverter disconnect box mounted on the exterior wall below it and a conduit running between themBasics

How Do Solar Panels Work? Sunlight to Outlet

How do solar panels work? Sunlight frees electrons in silicon, modules convert DC to AC, and this explainer traces the full chain from photon to your meter.

· 32 min read
A man in a brown shirt and glasses at a wooden kitchen table, working a calculator with printed sheets spread across the table in front of a sunlit windowBasics

What Are SRECs? Selling Solar Credits

This explainer covers what SRECs are, how a state renewable standard mints the certificate, why it sells apart from your power, and what the income is worth.

· 32 min read
Underside of a rooftop solar array showing aluminum racking rails and small grey electronics enclosures mounted beneath the panel framesBasics

Microinverters vs String Inverters

This comparison weighs microinverters against string inverters on shade, monitoring, roof complexity, cost, failure modes, warranty length, and battery plans.

· 29 min read
A close view along rows of dark solar panels mounted on a tiled roof, the far end catching warm low sunlightBasics

Community Solar: How It Works and Who It Fits

Community solar for renters and shaded roofs: how the bill credit works, what the subscription discount really is, and which contract terms to read first.

· 25 min read
Solar panels on a residential rooftop in bright midday sun with a home battery on the wall belowBasics

Solar Inverter vs Battery: Do You Need Both?

This explainer covers the difference between a solar inverter and a battery: what each does, DC to AC conversion vs storage, costs, and whether you need both.

· 27 min read
Extreme macro close-up of a monocrystalline solar cell showing the fine silver busbar grid lines crossing over the dark textured silicon surfaceBasics

Solar Panel Efficiency: What the Percentage Means

This teardown explains solar panel efficiency: what the percentage measures, typical ratings by panel type, and when paying extra for it is actually worth it.

· 27 min read
Home solar panels under a heavily overcast grey sky with soft diffuse daylight and a cool blue-grey tintBasics

Do Solar Panels Work on Cloudy Days?

This briefing answers do solar panels work on cloudy days: yes, at reduced output, with diffuse-light physics, cloud versus shade, and rain and snow facts.

· 28 min read
A residential electricity meter mounted on the exterior wall of a home in bright afternoon lightBasics

What Is Net Metering? (How Solar Credits Work)

This explainer covers what net metering is: how a utility credits the excess solar you send to the grid, how those credits roll over, and why the rate varies.

· 24 min read
Solar panels on a snowy residential roof under bright winter sun with a cool blue tintBasics

Do Solar Panels Work in Winter and Cloudy Weather?

This briefing answers do solar panels work in winter and cloudy weather: yes, at reduced output, with cold-efficiency physics, snow facts and seasonal math.

· 25 min read