Got an EV?
ClearWatt is your personal EV companion helping you get the most out of your electric car. Understand your battery health, real-world range, charging, warranties and more all in one place.
Start free today, unlock deeper insights when you’re ready.
Early ownership
For most, owning an EV is a new experience
EV ownership comes with new questions that don’t always have obvious answers - especially early on. ClearWatt helps unpack those questions, helping you understand your battery health and giving you confidence in your EV’s range, charging and day-to-day performance.
Your EV toolkit
Everything you need to understand your EV - in one place
Learn (Free)
Plain-English EV guidance
- Easy-to-follow EV Explained guides
- Battery basics, charging, range and care
- Road tax, MOT status and vehicle specs
Know your car (Free)
Your EV, clearly explained
- Your vehicle’s specification and configuration
- Basic battery details and factory capacity
- Key ownership information at a glance
Go deeper (Paid)
Battery health & premium insights
- Independent battery health assessment
- Real-world range and charging behaviour
- Valuation, warranties, provenance and more
One-off £39.99 battery health test
Battery health
Small battery changes are normal - bigger differences are worth understanding
Understanding your battery health gives context to everything else - from real-world range and charging behaviour to long-term ownership and resale value.
Batteries naturally change over time
A moderate reduction in battery performance is normal as an EV ages.
It can affect range and charging
Over time you may notice changes in range or charging speed, especially in colder weather.
Every EV ages differently
Battery changes depend on driving, charging and manufacturing differences.
37 %
of EV drivers notice their range drop over time.
How it works
Understanding your battery health — without the hassle
No garage visits. No cables. No disruption to how you drive and charge.
ClearWatt runs quietly in the background
We securely collect the data we need from your car and phone, automatically. In most cases, there’s nothing for you to do.
Just use your EV as normal - we’ll do the rest
We’ll automatically collect enough data from a few typical drives or charging sessions — no special trips needed.
We’ll then generate your personalised EV Health Report
You’ll receive a clear PDF explaining your battery health, real-world range, charging behaviour — and what’s normal for your EV.
