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Climate & Energy Calculators

Solar, storage, HVAC electrification, carbon footprint and climate-risk decision tools.

Solar ROI Calculator

Drop your monthly bill, local kWh tariff, roof area, panel tier, battery option, financing, net-metering policy, electricity-price appreciation, panel degradation, and time horizon. Calculator sizes the system to your usage (or roof, whichever is smaller), reflects the 2026 expiry of the IRS Section 25D 30% federal credit (no federal credit for installs after Dec 31 2025 under the One Big Beautiful Bill), simulates production with degradation and tariff escalation, and returns payback period, 20-yr savings, IRR, battery payback delta, and lifetime CO₂ avoided. Anchored to NREL PVWatts insolation, LBNL field-study degradation curves, and EIA grid-emissions data.

Whole-Home Electrification Bundle ROI

Heat pump + induction + EV charger + solar + battery — bundled vs sequential 25-yr NPV. IRA Sections 25C / 25D / 30C credits, low-income HEEHRA boost, panel upgrade trigger.

Wildfire Defensible Space ROI

Annual expected-loss reduction. NPV 10-year. Insurance non-renewal flag for high-WUI zones. Cal Fire Zone 0/1/2 compliance.
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