Overall UXE Score
7.94
15 jurors · −0.3 vs season average
- Recognition
- Featured
- Recognized
- 4 Mar 2026
- Season
- Quarter 1, 2026
- Studio
- Vatn Design, Copenhagen
- Categories
- Mobile Experience · Consumer · Innovation in UX
- Platforms
- iOS, Android
01/Overview
Home energy made legible: solar, battery and grid in one ring, with nudges timed to the forecast.
Kelvin connects solar panels, home batteries, heat pumps and EV chargers into one view. A single ring shows today’s energy and how much of it came from the sun.
Instead of charts for their own sake, Kelvin gives one timely nudge a day: run the dryer after noon, charge the car tonight. Devices can follow the forecast automatically.
Every automation can be overridden with one tap, and Kelvin explains how much each decision saved.
- Client
- Kelvin Energy ApS · Energy
- Audience
- Households with solar panels or a heat pump
- Industry
- Home & Energy
- Platforms
- iOS, Android
- Status
- Live since December 2025
- Markets
- Denmark, Sweden, Germany, Netherlands
- Languages
- 5 — Danish, Swedish, German, Dutch, English
02/Honors
Recognized by the editors. Awarded by the jury.
Recognition
Featured
Meets the UXE standard. Earns a public profile, a badge and a place in the quarterly awards.
Conferred by the editors on 4 Mar 2026 · minimum UXE 7.0
Awards · Quarter 1, 2026
Season results- Mobile ExperienceHonorable Mention
02 / 12 · Consumer
- Innovation in UXNominee
12 / 12
Results announced 15 Apr 2026 by the category juries.
03/Jury verdict
In the jury’s words.
“Kelvin makes energy legible. One ring and one nudge a day do more than any dashboard we reviewed.”
Yusuf Demir
Product Design Manager, Kuzey Labs · Türkiye
On behalf of 15 jurors
04/Score breakdown
How the jury scored it.
- Overall UXE Score−0.3 vs Q1 2026 average
- 7.94
- Strongest criterionUI & Consistency
- 8.4
- Jury agreementaverage spread ±0.49
- Moderate
- Jurorsof Q1 2026’s panel
- 15
- 8.1−0.2
Usability
Can people complete what they came to do — efficiently, confidently and without error?
- 7.8−0.3
Information Architecture
Is content organized, labeled and navigable in the way people actually think?
- 8.4−0.3
UI & Consistency
Is the visual language coherent and purposeful across every screen and state?
Jury noteA confident, restrained dark UI with a single accent doing all the work.
- 8.3−0.2
Interaction & Feedback
Does every action respond clearly, promptly and meaningfully?
- 7.6−0.2
Performance
Does it feel fast — perceived and measured — on real devices and networks?
Jury noteCold starts are slower than they should be on mid-range Android.
- 7.5−0.3
Accessibility
Can everyone use it, including people relying on assistive technology?
Jury noteNo light mode and no tabular alternative for the weekly chart.
- 7.9−0.3
Learnability
How quickly does a first-time user become a confident one?
Scores are the mean of 15 jurors. Ticks mark the Q1 2026 average across 4 recognized projects.
05/The jury
15 ballotsEvery vote, on the record.
Each juror scored Kelvin independently, from 1 to 10 on every criterion. Nothing is weighted by seniority and no score is discarded — the published result is simply their mean.
One juror Jury mean
| Juror | Usab | IA | UI | Inter | Perf | A11y | Learn | Overall |
|---|---|---|---|---|---|---|---|---|
| Tomasz WójcikMotion Design Lead, Kadr Studio · PL | 8.3 | 8.7 | 9.0 | 8.8 | 8.5 | 8.6 | 8.8 | 8.67 |
| Sofía MarínAccessibility Lead, Clarosol · ES | 8.5 | 8.5 | 8.4 | 9.4 | 8.1 | 8.3 | 9.0 | 8.60 |
| Mateo ÁlvarezInteraction Designer, Lumbre · MX | 8.9 | 8.4 | 8.6 | 8.4 | 7.7 | 7.4 | 8.2 | 8.23 |
| Amara NwosuDesign Director, Kestrel & Vale · GB | 8.2 | 7.8 | 8.6 | 8.3 | 8.3 | 8.4 | 7.9 | 8.21 |
| Hana NovákováStaff Product Designer, Brno Works · CZ | 8.7 | 7.9 | 8.0 | 7.6 | 8.2 | 8.0 | 8.3 | 8.10 |
| Olivia GrantVP of Design, Harbor & Pine · US | 8.0 | 7.2 | 9.2 | 8.6 | 7.7 | 7.8 | 7.7 | 8.03 |
| Priya RamanHead of Product Design, Tessera Cloud · IN | 7.7 | 8.1 | 8.5 | 8.7 | 7.1 | 7.9 | 7.7 | 7.96 |
| Marco BelliniSenior Product Designer, Studio Vetro · IT | 8.5 | 7.8 | 8.5 | 8.3 | 7.2 | 6.9 | 8.1 | 7.90 |
| Camille RouxCreative Director, Atelier Nuit · FR | 7.9 | 8.0 | 8.5 | 8.5 | 7.7 | 7.0 | 7.5 | 7.87 |
| Mei TanakaUX Research Lead, Hoshi Labs · JP | 8.3 | 7.7 | 8.7 | 8.1 | 7.1 | 7.4 | 7.6 | 7.84 |
| Kwabena AsanteService Design Lead, Adinkra Digital · GH | 8.0 | 7.2 | 8.4 | 8.4 | 7.4 | 7.1 | 7.9 | 7.77 |
| Ravi MenonWeb Performance Engineer, Quickline · SG | 8.0 | 7.5 | 7.9 | 8.4 | 7.9 | 7.1 | 7.5 | 7.76 |
| Lukas BrennerPrincipal Product Designer, Feldwerk · DE | 7.5 | 7.7 | 8.1 | 7.8 | 7.0 | 6.8 | 7.5 | 7.49 |
| Yusuf DemirVerdictProduct Design Manager, Kuzey Labs · TR | 7.6 | 7.7 | 8.1 | 7.7 | 6.9 | 6.8 | 7.5 | 7.47 |
| Zara HassanHead of UX, Sahel Pay · AE | 7.4 | 6.8 | 7.5 | 7.5 | 7.2 | 7.0 | 7.3 | 7.24 |
| Jury mean | 8.1 | 7.8 | 8.4 | 8.3 | 7.6 | 7.5 | 7.9 | 7.94 |
| Spread (σ) | ±0.43 | ±0.49 | ±0.42 | ±0.49 | ±0.50 | ±0.60 | ±0.48 | ±0.38 |
marks each juror’s area of expertise. Deeper tint, higher score.
01
Submitted
9 Feb
Entry received, free of charge
02
Jury scoring
16 Feb – 3 Mar
15 independent ballots
03
Recognized
4 Mar 2026
Featured
04
Awards
15 Apr 2026
Honorable Mention · Mobile Experience
06/Screens
3 screensThe product, screen by screen.
07/Case study
From problem to proof.
The challenge
Energy apps showed kilowatt-hours nobody understood, and every device brand had its own app.
The approach
Vatn Design translated energy into two ideas — how much, and how much from the sun — and replaced dashboards with one well-timed nudge a day.
Research
Home visits
22 households over two seasons
Comprehension tests
Energy units vs. plain framing, n=150
Field trial
300 homes, 4 months
Key insights
- 01
People understand “72% from the sun” instantly; kWh takes explaining.
- 02
One nudge is acted on; five are ignored.
- 03
Automation is trusted when overriding it is effortless.
Outcomes
+18%
Solar self-consumption
trial households, 4 months
€ 212
Average yearly saving
modelled on trial data
61%
Nudges acted on
within 24 hours
Outcomes are reported by the submitting team and reviewed by the jury.
08/Accessibility & performance
Built for everyone, on any device.
Accessibility
WCAG 2.1 AA
Audited by In-house audit, November 2025
7.5
Jury
- Energy ring has a spoken summary for screen readers
- Dynamic Type supported on all main screens
- Toggles carry on/off text, not only colour
Known gaps
- Dark mode only
- Weekly chart has no tabular alternative yet
Performance
2 of 4 within budget
Pixel 6a and iPhone 11, median of 30 cold launches
7.6
Jury
| Metric | Measured | Budget |
|---|---|---|
| Cold start | 1.2 s (over budget) | ≤ 1.0 s |
| Device command latency | 450 ms (within budget) | ≤ 500 ms |
| Crash-free sessions | 99.7% (over budget) | ≥ 99.8% |
| Install size | 52 MB (within budget) | ≤ 60 MB |
Within budget Over budget
09/Design system
Watt, the system behind Kelvin.
- System
- Watt
- Components
- 42
- Design tokens
- 104
Color
- #0E0E0F
Night
- #FFAA33
Amber
- #7EE0A4
Battery
- #8FB4FF
Grid
- #F5F1EA
Warm white
Typography
Sora
Interface & numerals
Google Fonts
UX patterns
- Smart home
- Data visualisation
- Nudges
- Automation
- Dark mode
10/Credits
The people who made it.
Studio
Vatn Design
Copenhagen, Denmark
Climate-focused product design, from energy dashboards to hardware companions.
- Founded
- 2015
- Team
- 11–50
- Recognized
- 1
Team
- Mads KjærDesign Director
- Signe HolmProduct Designer
- Anders LundMobile Lead
- Clara BeckUX Researcher
- Client
- Kelvin Energy ApS
- Industry
- Energy
Built with
- Flutter
- Matter
- Home Assistant integration
- Weather APIs
- Figma
→/More from the showcase
Whole seasonMore from Q1 2026.
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UXE
Filmwell
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Casa Ombra
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