About ElectrifyCalc

Why we built this

The federal 30% homeowner solar tax credit (Section 25D) expired on December 31, 2025. Overnight, every solar payback calculator online became wrong — most were still showing a 30% discount that no longer existed. EV owners faced the same problem: a sea of generic “can I install a charger?” advice that never showed the actual NEC calculation behind the answer.

ElectrifyCalc was built to provide accurate, honest math for two of the biggest financial decisions a homeowner faces: going solar and installing an EV charger. Every calculator uses real data sources — NREL PVWatts for solar production, EIA rates for electricity costs, NEC 220.82 for panel capacity — and every result is visible immediately, without creating an account.

What we cover

Solar calculators: Solar ROI Calculator — 25-year payback model using NREL state production data and EIA electricity rates, updated for the post-Section-25D reality. Coming soon: Solar Lease vs Buy vs PPA, and EV Charger Installation Cost.

EV charging tools: Six free calculators covering panel capacity (NEC 220.82 method), charging cost by state, charging time by vehicle, panel upgrade cost estimates, solar offset sizing, and charger amperage comparison.

Our principles

• Free, always. Every calculator shows its result without registration or payment.
• No stale tax credit math. Section 25D is gone. Our calculators reflect that. We show the Section 30C EV charger credit (expires June 2026) with an explicit expiration warning.
• Cited sources only. Every number comes from NREL, EIA, IRS, or published research. We don’t make up data.
• Honest about limits. These are planning estimates, not professional electrical or financial assessments. We say so on every result page.

Who runs this

ElectrifyCalc is an independent project — no VC funding, no installer partnerships, no sponsored results. The site is supported through Google AdSense contextual ads and Amazon Associates affiliate links on product recommendations. Neither relationship influences the calculator results or the data behind them.