I built an EV trip planner that optimizes for cheapest charging cost, looking for feedback
Hey all, I've been building a side project called WattWay and I'd really value this sub's feedback before I push it further.
The idea: most planners show you where you can charge; WattWay tries to answer what's the cheapest realistic way to actually get there. You give it your car, starting %, and how much charge you want on arrival, and it returns a minimal sequence of stops, weighing network prices, any membership discounts you have, charger power/reliability, detour distance, and your car's range and charge curve.
Concrete example: LA → Salt Lake City (688 mi) in a Hyundai IONIQ 9 from 80%. It planned 3 stops for ~$51 total and ~32 min of charging, and routed me to a free-to-use 360 kW charger first before touching the paid networks. (USA ONLY)
What I'd genuinely love feedback on:
- Stop choices: on routes you know well, do its picks match what you'd actually do? Where does it pick something dumb?
- Pricing realism: it uses Open Charge Map's community pricing where available, else per-network estimates. If a network's default rate looks off, tell me.
- Missing cars or networks: what should I add?
- Anything confusing in the UI.
Honest caveats so I'm not overselling: no live pricing or real-time port availability yet (both need data feeds I don't have as a free tool). That's the roadmap. It's a free personal project (I'm TheSaltyKorean), not a company.
I didn't want to lead with a link and come off as an ad, so I'll drop it in a comment if that's allowed here.