Sizing & Design

Solar Panel CalculatorSolar Production CalculatorRoof Size to Solar CalculatorOff-Grid System CalculatorRoof Angle & Tilt CalculatorSolar Irradiance CalculatorSolar Cable Size CalculatorShading Loss CalculatorAppliance Solar Load CalculatorElectricity Bill Calculator

Storage & Power

Battery Size CalculatorInverter Size CalculatorEV Charging Load CalculatorBattery Backup Runtime CalculatorCharge Controller Sizing CalculatorGenerator Backup Sizing CalculatorBattery ROI / Time-of-Use CalculatorPeak Shaving CalculatorBattery Storage Cost Calculator

Money & Payback

Solar ROI CalculatorSolar Loan CalculatorSolar Savings CalculatorSolar Payback Period CalculatorNet Metering CalculatorLease vs. Buy vs. PPA CalculatorSolar Panel Cost CalculatorSolar Tax Credit & Incentive Calculator

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Everything on Solargrin, organized by category. Tools marked Coming soon are on the build roadmap but not live yet — no broken links here.

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Guides & blog

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Solar by state (25)

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Solar by state (cont'd)

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Sizing & design — live

Solar Panel Calculator Solar Production Calculator Roof Size to Solar Calculator Off-Grid System Calculator Roof Angle & Tilt Calculator Solar Irradiance Calculator Solar Cable Size Calculator Shading Loss Calculator Appliance Solar Load Calculator Electricity Bill Calculator

Sizing & design — coming soon

Ground Mount Spacing Calculator Snow Load Calculator Azimuth/Orientation Loss Calculator

Storage & power — live

Battery Size Calculator Inverter Size Calculator EV Charging Load Calculator Battery Backup Runtime Calculator Charge Controller Sizing Calculator Generator Backup Sizing Calculator Battery ROI / Time-of-Use Calculator Peak Shaving Calculator Battery Storage Cost Calculator

Storage & power — coming soon

DC Fuse & Breaker Sizing Calculator Hybrid Inverter Sizing Calculator Battery C-Rate Calculator

Money & payback — live

Solar ROI Calculator Solar Loan Calculator Solar Savings Calculator Solar Payback Period Calculator Net Metering Calculator Lease vs. Buy vs. PPA Calculator Solar Panel Cost Calculator Solar Tax Credit & Incentive Calculator

Money & payback — coming soon

Property Value Uplift Calculator Solar Depreciation Calculator Community Solar Subscription Calculator

Local cost breakdowns (batch 1)

Solar Panel Cost — California Solar Panel Cost — Texas Solar Panel Cost — Florida Solar Panel Cost — New York Solar Panel Cost — Pennsylvania + 20 more states, same pattern — see the Solar Panel Cost Calculator page for the full list