Solar Energy Resources
Curated links to official solar energy data sources, tools, and organizations. We use many of these resources to power our calculator and inform our guides.
Official Data Sources
SEIA — Solar Energy Industries Association
The national trade association for the solar industry. Excellent source for market data, policy tracking, and industry reports.
Incentives & Policy
DSIRE — Database of State Incentives for Renewables & Efficiency
The most comprehensive database of solar incentives, rebates, and policies across all 50 states. Updated regularly by North Carolina Clean Energy Technology Center.
IRS Form 5695 — Residential Energy Credits
Official IRS form for claiming the federal solar Investment Tax Credit (ITC). Includes instructions and worksheets.
Battery & Equipment Information
ENERGY STAR Water Heaters & Appliances
Find energy-efficient appliances to reduce your off-grid energy needs. Important — every watt saved reduces your solar system cost.
Off-Grid Living & Education
NEC (National Electrical Code) — Article 690: Solar Photovoltaic Systems
The safety standard for solar electrical installations in the US. Essential reading for DIY installers and professionals alike.
DOE — Planning a Home Solar Electric System
Government guide covering the basics of residential solar planning, from site assessment to installation.
Zillow Research — Solar Home Value Impact
Research data on how solar panels affect home resale value. Studies show an average 4% increase in home value.
Our Tools
SolarCalc.fyi — Off-Grid Solar Calculator
Our free, no-signup-required calculator. Design your complete off-grid solar system in 2 minutes with real NREL solar data.
Guide Library
Browse all our guides: solar basics, panel sizing, battery comparison, ROI analysis, myths debunked, and more.