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ev-vs-gas

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Compare an EV against a comparable gas car on total cost — upfront gap after incentives, energy vs fuel per year, maintenance delta, and the crossover year when the EV pulls ahead (or doesn't). Use when asked is an EV worth it, EV vs gas total cost, when does an EV pay for itself, or should my next car be electric. Produces the year-by-year cumulative comparison from the script, the crossover year, the per-mile energy math, and the honest not-modeled list.

skills/ev-vs-gas/SKILL.md

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Nov 11, 2026
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# EV vs Gas Skill

The EV question is a crossover question: a higher price tag melting under lower running costs, with the answer living in *your* numbers — miles driven, electricity price (home vs. public charging are different products), and how long you keep cars. This skill runs the cumulative math year by year and reports where the lines cross, then is honest about what the model can't see: battery risk, a resale market still finding its feet, and the charger install that belongs in the purchase price.

## What This Skill Produces

- **The cumulative table** — EV vs gas total cost per year over the horizon, from the script
- **The crossover year** — where the EV pulls ahead, or the finding that it doesn't within the horizon
- **The per-year energy math** — miles ÷ efficiency × price, both sides, shown not asserted
- **The not-modeled list** — battery, resale, charger install, price drift — stated up front

## Required Inputs

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