Guides

Timeless, fact-checked explainers — the fundamentals that don't change year to year.

• Cost & SavingsHow Much Can You Actually Save With Solar?Solar savings depend on your electricity rate, usage, and local sun. Here's how to estimate your real savings — and why the honest answer is a range, not a slogan.
• Cost & SavingsHow Much Do Solar Panels Cost? (2026 Prices)Solar panels cost about $2.50–$3.50 per watt installed in 2026 — roughly $15,000–$25,000 for a typical home system before any state incentives. Here's the breakdown.
• Solar BasicsHow Much Electricity Does One Solar Panel Produce?A single modern solar panel produces roughly 1.5–2.5 kWh per day, or ~550–900 kWh a year. Here's what drives the number — wattage, sun hours, and real-world losses.
• System DesignHow to Size a Solar System (Step-by-Step)Sizing solar comes down to your annual usage, local sun, and goals. Here's the step-by-step method to estimate the right system size — in kW and number of panels.
• Solar BasicsMonocrystalline vs Polycrystalline Solar Panels: Which Is Better?Monocrystalline panels are more efficient and now dominate the market; polycrystalline are cheaper but less efficient. Here's how they compare and which to choose.
• Incentives & PolicyCalifornia NEM 3.0, Explained for HomeownersNEM 3.0 cut the value of exported solar in California by about 75%, reshaping the math toward batteries. Here's what it is and what it means if you're going solar.
• Solar BasicsThe Parts of a Home Solar System, ExplainedA home solar system is more than panels. Here's what each part does — panels, inverter, racking, meter, battery, and monitoring — in plain English.
• Buying Guide10 Questions to Ask Before Signing a Solar ContractBefore you sign for solar, get clear answers on price, equipment, warranties, financing, and what happens if the installer fails. Here are the 10 questions that matter.
• Incentives & PolicyHow to Find Solar Incentives in Your StateSolar incentives vary by state, county, and utility. Here's how to find every rebate, tax break, and program you qualify for — and the free database that lists them.
• Buying GuideSolar Warranties Explained: What's Actually CoveredSolar systems come with several different warranties — equipment, performance, and workmanship. Here's what each covers, typical lengths, and who backs them.
• System DesignSolar Inverters Explained: String vs MicroinvertersThe inverter converts your panels' power for home use. String inverters are cheaper; microinverters handle shading better and last longer. Here's how to choose.
• Cost & SavingsHow to Read Your Electric Bill Before Going SolarYour electric bill holds the numbers that decide whether solar pays off — your kWh usage, your rate, and fixed charges. Here's how to read it before getting quotes.
• Solar BasicsDo Solar Panels Work on Cloudy Days and at Night?Yes — solar panels still produce on cloudy days, just less. Here's how much output you lose to clouds, why panels make nothing at night, and how weather affects solar.
• Solar BasicsHow Do Solar Panels Work? (A Plain-English Guide)A simple, jargon-free explanation of how solar panels turn sunlight into electricity your home can use — from the photovoltaic effect to your electric meter.
• Buying GuideHow to Choose a Solar Installer (and Red Flags to Avoid)Choosing the right solar installer matters as much as the panels. Here's what to check — licensing, equipment, warranties, finances — and the red flags that signal trouble.
• System DesignDo I Need a Solar Battery? (Storage Guide for 2026)A solar battery stores power for night and outages — but it's a big added cost. Here's when a battery is worth it in 2026, when it isn't, and how to decide.
• System DesignWill Solar Work on My Roof? (Direction, Shade, and Roof Type)Not every roof is a good fit for solar. Here's how roof direction, shade, pitch, age, and material affect whether — and how well — solar will work on your home.
• Incentives & PolicyNet Metering Explained (and Why It's Disappearing)Net metering is how your utility credits you for solar power you send to the grid. Here's how it works, why states are cutting it back, and what California's NEM 3.0 changed.
• Cost & SavingsSolar Payback Period: How Long Until Panels Pay for Themselves?The solar payback period is how long it takes for energy savings to cover your system cost. Here's how to calculate it, typical 2026 ranges, and how to shorten it.
• System DesignHow Many Solar Panels Do I Need for My Home?A simple way to estimate how many solar panels your home needs, based on your electricity use, your local sun, and panel wattage — with a worked example.

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