Solar ROI Calculator
Estimate solar payback, lifetime savings, incentives, utility-rate assumptions, and long-term ROI before comparing installer quotes.
Free Solar Planning ToolsFree Solar Calculators & System Sizing Tools
Estimate solar savings, system size, battery backup, and monthly energy use from one practical planning hub.Accurately estimate your panel requirements, battery backup needs, and total ROI with our data-driven solar utility hub.
Solar calculatorsPlan with practical solar calculators
Solar ROI Calculator
Estimate solar payback, lifetime savings, incentives, utility-rate assumptions, and long-term ROI before comparing installer quotes.
Calculate ROI
Battery Sizer
Estimate home solar battery size from critical loads, runtime, autonomy days, usable capacity, efficiency, and reserve margin.
Estimate Size
Panel Estimator
Estimate solar panel count and system size from electricity use, sun hours, panel wattage, roof area, and system losses.
Estimate Panels
Battery Sizer
Estimate home solar battery size from critical loads, runtime, autonomy days, usable capacity, efficiency, and reserve margin.
Panel Estimator
Estimate solar panel count and system size from electricity use, sun hours, panel wattage, roof area, and system losses.
Solar learning paths
Choose the right solar planning path
Each hub connects one major solar decision to the calculators and articles that support it.
Solar Planning
Follow the homeowner sequence for usage review, roof checks, sizing, incentives, and quote comparison.
Open planning hubCosts and Payback
Understand project cost, incentives, export credits, and payback before comparing installer proposals.
Compare costsBattery Storage
Size backup around critical loads, outage goals, usable capacity, and solar recharge assumptions.
Plan storageCalculator Toolkit
Run the ROI, panel, battery, and energy-use calculators from one decision-focused toolkit.
Use the toolsLatest Solar Guides & Tutorials
Solar EquipmentExpert Reviewed
Solar Panel Maintenance Checklist: 12 Things Homeowners Should Inspect
Use this solar panel maintenance checklist to monitor production, inspect visible issues, and know when a homeowner should call the installer.
7 min read
Updated May 28, 2026
Roof Shading and Solar Panels: How Much Production You Can Lose
Learn how roof shading affects solar panel production, what to ask installers, and how to compare shaded array designs.
7 min read
Updated May 29, 2026
Net Metering Explained: How Solar Credits Affect Your Electric Bill
Net metering explained for homeowners comparing solar credits, export rates, time-of-use pricing, and electric bill savings.
8 min read
Updated May 29, 2026
Latest Solar Guides
Solar Equipment
Solar Panel Maintenance Checklist: 12 Things Homeowners Should Inspect
Use this solar panel maintenance checklist to monitor production, inspect visible issues, and know when a homeowner should call the installer.
Read ArticleSolar Planning
Roof Shading and Solar Panels: How Much Production You Can Lose
Learn how roof shading affects solar panel production, what to ask installers, and how to compare shaded array designs.
Read ArticleIncentives
Net Metering Explained: How Solar Credits Affect Your Electric Bill
Net metering explained for homeowners comparing solar credits, export rates, time-of-use pricing, and electric bill savings.
Read ArticleSolar planning questions
Clear answers to the questions homeowners ask before comparing solar proposals.
How accurate are online solar calculators?
Online calculators are planning tools. They are useful for comparing scenarios, but final numbers should be checked against site-specific shade, roof geometry, utility rules, and installer design assumptions.
What should I prepare before requesting solar quotes?
Collect 12 months of electricity usage, your current rate plan, roof age, planned home upgrades, and any future loads such as EV charging or heat pumps.
Do I need a battery with solar panels?
Battery storage is most valuable when you need backup power, have time-of-use rates, or have limited export credit. It is not required for every solar project.
Methodical planning
Every guide is built to help you compare quotes with clarity.
Educational guidance built around transparent assumptions, practical math, and homeowner-first decision making.
- Reviewed guidance for incentives, storage, and equipment choices.
- Calculator-first planning paths that keep assumptions visible.
- Ad placements separated from editorial and calculator content.
30%
Federal ITC
Federal incentive guidance surfaced in planning flows.
1,000+
Install Data
Installation data points reflected in editorial reviews.
4.1%
Value Signal
Reported resale premium benchmark for owned systems.
Get smarter about solar before you buy.
Get concise solar planning notes, calculator updates, and homeowner decision guides.
Build a smarter solar plan before requesting quotes.
Start with your monthly electricity use, then compare panel count, payback, and battery scenarios.