
I built an EV savings calculator with live government data after buying a Kia EV9 and spending two years confused, brutal feedback welcome!! - evchargesavings.com
The day I got my EV9, I spent two hours puzzling over why the included charger was adding 4 miles per hour. Turns out it was a Level 1 brick in a standard 120V outlet. Had to schedule an electrician the next week. That confusion — multiplied across every question I had about charging costs, connector types, and whether EVs actually pencil out in my state — is why I built this.
After I figured it out, four friends and coworkers bought EV9s partly based on my experience. I helped each one set up Level 2 charging and understand what their electricity rate meant for monthly costs. At that point a side project turned into a full resource.
What it is: evchargesavings.com — pick an EV, enter your ZIP, get estimated annual fuel savings using real EIA electricity and gas prices for your state.
What the calculator actually outputs:
- A plain verdict: "Yes — switching makes financial sense" / "Borderline — incentives could tip it" / "Gas is cheaper for this driving pattern"
- Annual fuel savings (and monthly, and 5-year)
- Side-by-side fuel cost bars: your EV vs your current gas car
- CO₂ saved per year
- A break-even page — how many years of fuel savings pay back the EV price premium
- Everything recalculates live as you move the annual miles and % charged at home sliders.
- 100+ plain-English guides that go deeper on whatever the number surfaced — home charging setup, incentives, range anxiety, total cost of ownership
- Daily EV news on policy and pricing changes that would actually move your savings estimate
What I tried to do differently:
- Live data from EIA: electricity rates updated monthly, gas prices updated weekly — not hardcoded 2023 averages. A California driver at 30¢/kWh has completely different math than Wyoming at 11¢.
- Written specifically for non-Tesla owners. That experience is genuinely different — charging networks, connector compatibility, road trip planning all work differently.
- Explicit methodology page that shows the formulas and calls out what we don't model (maintenance, depreciation, incentives).
What I'm genuinely unsure about:
- Is the calculator output trustworthy enough that someone would use the number to make an actual decision?
- Does it feel like a useful tool or another affiliate SEO trap?
- What's the first thing you'd change?