Free Solar Energy Tools

Calculate your solar panel return on investment, payback period, and 25-year savings projection with system cost estimates and state incentive eligibility.

Determine the optimal solar system size for your home based on energy consumption and roof space.

Calculate battery storage ROI and payback period for your solar system with state-specific net metering policy analysis, time-of-use rate optimization, and Virtual Power Plant (VPP) revenue estimation.

Find out at what price home battery storage makes sense — with or without solar. See payback period, 10-year net savings, break-even battery price, and Virtual Power Plant revenue for your state.

Calculate how much CO2 emissions you can offset by switching to solar energy.

Reveal the true cost of going solar by exposing hidden fees, non-bypassable utility charges, income-graduated fixed charges, minimum bills, and interconnection costs that solar salespeople routinely omit from their quotes.

Find federal, state, and local solar incentives, tax credits, and rebates available for your area.

Compare solar panels side-by-side on efficiency, warranty, degradation, and cost per watt.

Compare solar inverters by type, warranty, price, and reliability. Filter string, microinverter, DC optimizer, and hybrid inverters with community-based reliability ratings.

Instantly check if your solar system qualifies for the federal tax credit. Covers the 25D/48E split, lease vs. own, FEOC compliance, and post-OBBBA rules — get a yes/no answer in 30 seconds.

Get a personalized countdown checklist for the July 4, 2026 construction-start deadline. Find out what documentation qualifies and what steps you need to take before time runs out.

Analyze your electricity bill to discover usage patterns, identify savings opportunities, and see how much solar panels could save you.

Compare 2-3 solar quotes side-by-side. Score each quote across cost, production, equipment, warranty, and incentives with red flag detection.

Decode your solar PPA or lease contract. Identify red flags like FMV buyout traps, escalator clauses, hidden dealer fees, and transfer restrictions before you sign.

Calculate combined solar panel and EV charging savings — annual and 25-year financial projections, optimal system sizing, and CO₂ reduction with real EPA vehicle data.

Find out if solar panels are still worth it in your state after the federal ITC expired. Compare costs, payback periods, net metering policies, and incentives for all 50 states plus DC.

Project your solar panel energy output over 25 years accounting for panel degradation. Compare premium, standard, and budget panel tiers with warranty threshold analysis.

Compare total cost of ownership across cash purchase, solar loan, lease, and PPA financing options over 25 years. Includes Section 48E ITC analysis for third-party-owned systems and state incentive lookups.

Compare cash purchase, solar loan, and lease/PPA ownership models. See 25-year total costs, break-even year, and who gets the 30% tax credit under each option in the post-OBBBA market.

Compare net energy metering (NEM) policies and export rates for all 50 US states. Interactive calculator shows how NEM policy impacts your solar payback period.

Check the current status of the federal solar Investment Tax Credit for your situation. Covers Section 25D expiration, Section 48E eligibility, deadlines, and bonus credits.

Texas-specific solar ROI calculator comparing ERCOT REP buyback rates, municipal utility rebates (Austin Energy, CPS, El Paso), and city-level payback estimates for 5 major metros.

Find out when your net metering benefits expire and how much your savings will drop when NEM grandfathering ends. Get a personalized deadline, rate change, annual savings impact, and battery payback estimate.

Estimate your total DIY solar installation cost including permit fees and interconnection by jurisdiction. See your permit complexity badge by ZIP code, full cost breakdown, and compare DIY vs professional install quotes.

Find Virtual Power Plant programs in your state and learn how to earn money with your battery. Compare compensation, eligibility, and enrollment links for VPP programs across the US.

Analyze your roof's solar potential by address using satellite imagery. Get panel count, annual production, savings, and roof segment orientation data powered by Google Solar API with NREL PVWatts fallback.

Calculate exactly how many batteries you need for backup power based on your usage and outage duration. Compare LFP, NMC, lead-acid, and Tesla Powerwall options with state incentive-adjusted costs.

Estimate your monthly and annual energy savings when switching to solar power.

Find out how many years it will take for your solar investment to pay for itself.

Get an estimate of total installation costs including equipment, labor, and permits for your area.

Find the average peak sun hours for your location to estimate solar energy production potential.

Properly size your solar inverter to match your panel array for maximum efficiency.

Analyze how your roof's orientation, tilt, and shading affect solar panel performance.