Tools & Wizards About Us
zonnepanelen.net screenshot

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

zonnepanelen.net

Zonnepanelen: Advies & kosten [Complete gids 2025]

Page Load Speed

4.5 sec in total

First Response

276 ms

Resources Loaded

3.9 sec

Page Rendered

390 ms

zonnepanelen.net screenshot

About Website

Welcome to zonnepanelen.net homepage info - get ready to check Zonnepanelen best content for Netherlands right away, or after learning these important things about zonnepanelen.net

Verkozen tot Nr. 1 adviesplatform voor zonnepanelen. Handige rekentools, up-to-date info, valkuilen en actuele prijzen van 2025.

Visit zonnepanelen.net

Key Findings

We analyzed Zonnepanelen.net page load time and found that the first response time was 276 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

zonnepanelen.net performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value5.8 s

49/100

10%

TBT (Total Blocking Time)

Value11,280 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.04

99/100

15%

TTI (Time to Interactive)

Value16.8 s

5/100

10%

Network Requests Diagram

zonnepanelen.net

276 ms

zonnepanelen.net

663 ms

www.zonnepanelen.net

1076 ms

3514312466.js

164 ms

bootstrap.css

267 ms

Our browser made a total of 77 requests to load all elements on the main page. We found that 71% of them (55 requests) were addressed to the original Zonnepanelen.net, 4% (3 requests) were made to Fonts.gstatic.com and 4% (3 requests) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Zonnepanelen.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 255.9 kB (19%)

Content Size

1.4 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zonnepanelen.net main page is 1.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 52.2 kB

  • Original 65.4 kB
  • After minification 57.6 kB
  • After compression 13.1 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 7.8 kB, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 52.2 kB or 80% of the original size.

Image Optimization

-6%

Potential reduce by 58.4 kB

  • Original 1.0 MB
  • After minification 972.0 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Zonnepanelen images are well optimized though.

JavaScript Optimization

-57%

Potential reduce by 144.7 kB

  • Original 255.2 kB
  • After minification 255.2 kB
  • After compression 110.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 144.7 kB or 57% of the original size.

CSS Optimization

-65%

Potential reduce by 542 B

  • Original 834 B
  • After minification 768 B
  • After compression 292 B

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Zonnepanelen.net needs all CSS files to be minified and compressed as it can save up to 542 B or 65% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (36%)

Requests Now

67

After Optimization

43

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zonnepanelen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zonnepanelen.net

zonnepanelen.net

276 ms

zonnepanelen.net

zonnepanelen.net

663 ms

www.zonnepanelen.net

www.zonnepanelen.net

1076 ms

3514312466.js

3514312466.js

164 ms

bootstrap.css

bootstrap.css

267 ms

style.css

style.css

398 ms

styles.css

styles.css

324 ms

jquery.js

jquery.js

420 ms

jquery-migrate.min.js

jquery-migrate.min.js

321 ms

bootstrap.min.js

bootstrap.min.js

49 ms

jquery.simpleWeather.min.js

jquery.simpleWeather.min.js

50 ms

menu-functions.js

menu-functions.js

318 ms

validator.js

validator.js

352 ms

profile.js

profile.js

412 ms

event

event

45 ms

css

css

55 ms

jquery.fileupload.css

jquery.fileupload.css

92 ms

font-awesome.css

font-awesome.css

89 ms

lightbox.css

lightbox.css

95 ms

ga.js

ga.js

162 ms

analytics.js

analytics.js

165 ms

body-bg7.png

body-bg7.png

207 ms

close.png

close.png

154 ms

loading.gif

loading.gif

154 ms

prev.png

prev.png

158 ms

next.png

next.png

156 ms

haakje-topbanner.png

haakje-topbanner.png

155 ms

logo.png

logo.png

297 ms

marcel-klein.png

marcel-klein.png

204 ms

chart.svg

chart.svg

226 ms

e.gif

e.gif

228 ms

panel-thumb.png

panel-thumb.png

227 ms

4omvormers-thumb.png

4omvormers-thumb.png

294 ms

zonnepaneel-poly.jpg

zonnepaneel-poly.jpg

293 ms

zonnepaneel-mono.jpg

zonnepaneel-mono.jpg

294 ms

zonnepaneel-dunne-film.jpg

zonnepaneel-dunne-film.jpg

297 ms

legplan-zonnepanelen-plat-dak-small.jpg

legplan-zonnepanelen-plat-dak-small.jpg

661 ms

plat-dak-50x50.jpg

plat-dak-50x50.jpg

477 ms

afstand-zonnepanelen-plat-dak-50x50.jpg

afstand-zonnepanelen-plat-dak-50x50.jpg

475 ms

oost-west-zonnepanelen-small.jpg

oost-west-zonnepanelen-small.jpg

455 ms

legplan-schuin-dak-small.jpg

legplan-schuin-dak-small.jpg

822 ms

schuin-dak-50x50.jpg

schuin-dak-50x50.jpg

476 ms

zonnepanelen-tuinopstelling-544x252.jpg

zonnepanelen-tuinopstelling-544x252.jpg

874 ms

BTW-terug-zonnepanelen.jpg

BTW-terug-zonnepanelen.jpg

648 ms

10-vragen-homepage.jpg

10-vragen-homepage.jpg

824 ms

gratis-opbrengstscan-zonnepanelen-2.jpg

gratis-opbrengstscan-zonnepanelen-2.jpg

658 ms

testcentrum.jpg

testcentrum.jpg

736 ms

solarfrontier-sf170-s-zonnepaneel.jpg

solarfrontier-sf170-s-zonnepaneel.jpg

1065 ms

919-20150204-150537.jpg

919-20150204-150537.jpg

1067 ms

prestatiecheck-bart.jpg

prestatiecheck-bart.jpg

1143 ms

marcel-frontpage-zonnepanelen.png

marcel-frontpage-zonnepanelen.png

1116 ms

YouTube-social-square_red_24px.png

YouTube-social-square_red_24px.png

910 ms

twitter_29.png

twitter_29.png

955 ms

plus_29.png

plus_29.png

996 ms

last.jpg

last.jpg

1009 ms

ODelI1aHBYDBqgeIAH2zlNHq-FFgoDNV3GTKpHwuvtI.woff

ODelI1aHBYDBqgeIAH2zlNHq-FFgoDNV3GTKpHwuvtI.woff

151 ms

toadOcfmlt9b38dHJxOBGCmgpmuQqK2I-L2S9cF65Ek.woff

toadOcfmlt9b38dHJxOBGCmgpmuQqK2I-L2S9cF65Ek.woff

152 ms

toadOcfmlt9b38dHJxOBGIqjGYJUyOXcBwUQbRaNH6c.woff

toadOcfmlt9b38dHJxOBGIqjGYJUyOXcBwUQbRaNH6c.woff

153 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1137 ms

beste-zonnepanelen.jpg

beste-zonnepanelen.jpg

1016 ms

sdk.js

sdk.js

254 ms

widgets.js

widgets.js

137 ms

yql

yql

113 ms

Zonnepanelen_ik_weet_het_niet.jpg

Zonnepanelen_ik_weet_het_niet.jpg

1206 ms

brand_zonnepanelen.jpg

brand_zonnepanelen.jpg

1107 ms

zonnepanelen-kopen.jpg

zonnepanelen-kopen.jpg

1161 ms

dunne_film_zonnepanelen.jpg

dunne_film_zonnepanelen.jpg

1073 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

1172 ms

__utm.gif

__utm.gif

41 ms

collect

collect

29 ms

collect

collect

75 ms

collect

collect

83 ms

button.831500944bc3eb7ea5276ccdc3f71d2e.js

button.831500944bc3eb7ea5276ccdc3f71d2e.js

30 ms

tweet_button.6a78875565a912489e9aef879c881358.nl.html

tweet_button.6a78875565a912489e9aef879c881358.nl.html

44 ms

234 ms

xd_arbiter.php

xd_arbiter.php

272 ms

jot

jot

107 ms

Accessibility Review

zonnepanelen.net accessibility score

82

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Buttons do not have an accessible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Best Practices

zonnepanelen.net best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

zonnepanelen.net SEO score

93

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zonnepanelen.net can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Zonnepanelen.net main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

zonnepanelen.net

Open Graph data is detected on the main page of Zonnepanelen. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: