EV Battery health

EV Battery Health Report X Lovable

Vibecoding project built and shipped using Lovable, GPT, figma in a less than a sprint

4 minutes

672 words

			
Tools and resources
- Lovable
- GPT
- Figma
- Google Stitch

		

			
3rd party/ plugins
- Stripe
- Merchant bank
- Discord
- Slack

		

			
Time and team
- 4-5 hours
- Solo founder & builder
- Evening hacker
- Spiced tea

		

🔋 Problem statement
EV buyers lack an independent, data-informed ways to assess real-world battery health and range risk before purchase, leading to uncertainty and poor decision-making. The current solutions require booking a car retailer or garage service and paying for a technician to run a diagnostic.

My tool addresses the inconvenience by offering a remote service that gives an estimated report to speed up the process and help customers with buying and selling decisions. A report that downloads in seconds.

See origin prompt flow, iterated since, reduced for security 🔓

			
## How It Works
1. User selects car model
2. Uploads:
    - Screenshot at 100% charge
    - Odometer photo
    - Answers 6–8 usage questions
3. Pays £00.00
4. Receives downloadable PDF report within 24 hours
No API.
No dongle.
No visit.
---
# What the Report Includes
You position it as:
“Independent Digital Battery Health Estimate”
Report sections:
1. Estimated Battery Degradation %
2. Comparison vs UK fleet average
3. Expected remaining warranty margin
4. Resale value impact estimate
5. Risk tier (Low / Normal / Elevated)
6. Usage optimisation advice
Very clean.
Very professional.
---
You must NOT use:
- “Certified”
- “Official”
- “Manufacturer verified”
- “Diagnostic”
Instead use:
- “Independent Estimate”
- “Digital Assessment”
- “Data-Based Projection”
Add disclaimer:
“This report is an independent estimate based on user-provided data and public battery performance research. It is not a manufacturer-certified diagnostic test.”
---
Most buyers don’t need perfect.
They need reassurance.
---
# How You Build It (No Coding Required)
You can build this using:
- Lovable (front-end + payment)
- Airtable or Google Sheets (calculation logic)
- Zapier to automate workflow
- Canva for report template
- PDF generator tool
You can even manually generate reports at first.
You do NOT need automation initially.
---
# The Real Edge
Your competitive advantage isn’t tech.
It’s:
- Convenience (no garage visit)
- Price (cheaper than physical test)
- Speed (24-hour turnaround)
- Simplicity

		

Product scope summary

I identified the trust gap in the used EV market and designed a focused, single-model MVP that translates mileage and age into a clear, statistically bounded battery degradation estimate.
I defined the product scope, built the end-to-end user flow, implemented strict payment gating via Stripe, and created legally conservative safeguards to protect both users and the business. By prioritising precision over breadth, I delivered a credible, monetisable tool that balances data transparency, risk management, and premium UX execution.

Vibecoding workflow

Figma — Defined the core concept, mapped user flows, and built a design system canvas in parallel.
OpenAI GPT — Validated the product idea, stress-tested modelling logic, drafted legal safeguards, and formalised system rules.
Lovable — Built and shipped the live MVP, implemented payment gating, and deployed the production-ready experience.
Stripe — Integrated secure checkout and payment confirmation logic.
Merchant bank — Enabled transaction settlement and financial processing.
Google Stitch — Rapidly explored layout structures for phase 2 in the fastest way and explored an upgraded design system to scale the product
Discord — Collected early feedback, validated assumptions, and iterated quickly post-launch.

Learnings

Overall I solved a problem, ideated, designed, built and shipped a new product in record speed time. agentic AI platforms designed for full-stack software development are serious productivity hacks and immense fun.

Here are some themes I spent time problem solving and learning to refine my methods on, in a shorter time boxed period

Prompt maturity: learning to write all-inclusive rules that served front and back end
Lovable will not execute a high standard of UI polish – this must remain in the hands of craft to refine, polish and judge aesthetics
Inconsistencies will occur throughout the flows unless I later created rule and logic patterns for holistic replacements and updates
Stripe integration had delays in its backend/ security. It is not as ‘fast and swift’ as Lovable portal experience might suggest
Technical knowledge will help you unblock, debug and ship faster
Join Lovable on Discord – an incredible space to share and vibe with other builders!