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energy-charts.info

https://energy-charts.info· First analyzed 01 May 2026· Updated 01 May 2026
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energy-charts.info
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Mobile

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Hosting Provider

FHG-ISE

IP Address

192.107.235.120

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Karlsruhe, Germany

ASN

AS60824

Organization

FHG-ISE

Server

Nginx

Nameservers

ns1.ise.fraunhofer.de.ns3.fraunhofer.de.ns2.fraunhofer.de.ns1.fraunhofer.de.+1 more

Performance

99

Core Web Vitals

Weight

First Contentful Paint
818 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
9.4 MB
38 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
FHG-ISE

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

D58/100
17
7
1
Meta Tags7/15
Content10/12
Headings1/8
Technical13/21
E-E-A-T3/7
Images5/7
Links2/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
E
energy-charts.infoenergy-charts.info

Energy-Charts

Die Energy-Charts bieten interaktive Grafiken zu: Stromproduktion, Stromerzeugung, Emissionen, Klimadaten, Spotmarktpreisen, Szenarien zur Energiewende und e...

Description truncated.
Title Length13 chars

Recommended: 50-60 chars (~80px / 580px)

Description Length243 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

8 issues found

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Local SEO

Local Search Readiness

13/100
Poor
4 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D40/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
9/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:17%
Words:1,974
Token eff.:Optimal
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary17w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
AI readiness recommendation preview...
Upgrade to view recommendations

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
71/100
10
Passed
3
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
27/100
F
1.20 g
CO₂e / view
9.4 MB
Page Weight
5%
Cleaner Than
New Visitor
1.37 g
vs
Returning (cached)
683 mg
Annual (10K/mo)
143.5 kg
Emission Segments
Data Center
267 mg
Network
287 mg
Device
642 mg
Resource Breakdown
JavaScript
5.5 MB
Images
2.7 MB
CSS
1.1 MB
HTML
1.9 KB
Other
55.2 KB
Green Hosting Not Verified
FHG-ISE
7 recommendations
  • •Carbon footprint recommendation preview...
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C

Security Score

66%Fair
Interactive

HTTPS

No WAF

12d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

12.02.2026

Valid Until

13.05.2026

Subject Alternative Names (1)

energy-charts.info

SHA-256 Fingerprint

19:D0:6B:67:C7:D5:A7:1B:E3:F0:1E:BA:FB:39:7C:9D:A1:9F:7D:95...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-headers
DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Cont...
access-control-allow-methods
GET, POST, OPTIONS
access-control-allow-origin
leonid.muc.zae-bayern.de, grizzly.rheintal-hosting.ch, kkl.s...
access-control-expose-headers
Content-Length,Content-Range
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src 'self'; script-...
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

Domain Information

energy-charts.info

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
B
76/100
Mobile Friendly2 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width,initial-scale=1
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial
62/100
Readability
/30
19/30

14px · LH 1.50

Hierarchy
/20
7/20
WCAG
/25
17/25

1.6:1 min contrast

Performance
/25
19/25

System fonts

Heading Font

-apple-system

Body Font

-apple-system

Sans14px

Contrast Ratio

1.6:1

8 issues

Reading Comfort

~38 CPL

Narrow lines
21px
h4
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.6:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 34

Color Palette

5 unique colors
Light
#ffffff
Background· 64.3%
#acbeb8
Secondary· 6.8%
#009374
Primary· 0%
#73928c
Secondary· 4.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

11 Resources

7
Scripts
4
Styles
2
Async
4
Defer

Top Script Sources

.(6)stats.ise.fraunhofer.de(1)

Website Identity

energy-charts.info

Location detected: 🇩🇪 Germanyvia ip
de

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Last analyzed: 01 May 2026 at 16:06

Historical Analysis & Change Tracking