Guides
How Many Solar Panels to Power a House? (2026 Sizing Guide)
Most U.S. homes need 15 to 25 solar panels to cover the bulk of their electricity use. That is the honest short answer — but only […]
The SolarMath Blog
Guides
Every article is original, human-reviewed and at least 900 words — no spun content, no affiliate listicles, no "top 10 panels" filler. Each guide ends by handing you the calculator that runs its numbers.
Guides
How Solar Panels Are Priced Per Watt (2025 Breakdown)
The short answer: reduce every quote to one number — cash dollars per watt: total cash price ÷ total watts. For a standard rooftop system the […]
Guides
What Makes a Roof Good or Bad for Solar?
The short answer: grade your roof on five factors — direction (south = 100%, east or west ≈85%, north ≈65%), pitch (15–45° costs only a few […]
Guides
Solar Sales Traps: 9 Tactics and How to Spot Them
The short answer: none of the nine tactics in this guide requires an outright lie — they work by rushing you past the one number or […]
Guides
Battery Storage: Do You Actually Need One?
The short answer: a home battery adds $8,000–$15,000 and stores about 13.5 kWh — under half an average home’s daily use. It earns its place in […]
Guides
Is Solar Worth It in 2026? The Honest Maths
The short answer: solar is worth it in 2026 for a specific, identifiable set of households, marginal for others, and a poor buy for some. Five […]
Guides
How Net Metering Actually Works (and What Replaced It)
The short answer: under classic net metering, surplus power offsets what you import one-for-one, so every exported kWh is worth the full retail price. That deal […]
How this blog works
One topic per article, researched against utility tariffs, EIA rate data and published industry pricing — then linked two ways with the calculator that runs the same maths, so you can test every claim with your own numbers. Corrections are welcomed at the contact page and noted on the article.