Tools & Wizards About Us
tesvolt.com screenshot

Report Summary

  • 60

    Performance

    Renders faster than
    76% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 60% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

tesvolt.com

Energy Storage Systems For Renewable Energies | TESVOLT AG

Page Load Speed

5.8 sec in total

First Response

272 ms

Resources Loaded

2.8 sec

Page Rendered

2.8 sec

tesvolt.com screenshot

About Website

Visit tesvolt.com now to see the best up-to-date TESVOLT content and also check out these interesting facts you probably never knew about tesvolt.com

TESVOLT produces battery storage systems based on lithium batteries that can be connected to all renewable energies: sun, wind, water, biogas and thermal power.

Visit tesvolt.com

Key Findings

We analyzed Tesvolt.com page load time and found that the first response time was 272 ms and then it took 5.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

tesvolt.com performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value6.7 s

7/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value220 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.4 s

60/100

10%

Network Requests Diagram

tesvolt.com

272 ms

395 ms

cidemos.1.2.2-45.min.css

118 ms

main.css

233 ms

input.css

331 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that all of those requests were addressed to Tesvolt.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Tesvolt.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 47.2 kB (16%)

Content Size

302.7 kB

After Optimization

255.6 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Tesvolt.com main page is 302.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 228.0 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 43.5 kB

  • Original 53.6 kB
  • After minification 51.3 kB
  • After compression 10.2 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 43.5 kB or 81% of the original size.

Image Optimization

-1%

Potential reduce by 2.3 kB

  • Original 228.0 kB
  • After minification 225.7 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. TESVOLT images are well optimized though.

CSS Optimization

-7%

Potential reduce by 1.4 kB

  • Original 21.1 kB
  • After minification 21.1 kB
  • After compression 19.7 kB

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. Tesvolt.com has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

12

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TESVOLT. According to our analytics all requests are already optimized.

Network Requests Diagram

tesvolt.com

tesvolt.com

272 ms

395 ms

cidemos.1.2.2-45.min.css

cidemos.1.2.2-45.min.css

118 ms

main.css

main.css

233 ms

input.css

input.css

331 ms

cidemos.1.2.2-45.min.js

cidemos.1.2.2-45.min.js

1115 ms

testvolt-logo-claim.svg

testvolt-logo-claim.svg

112 ms

united-kingdom.svg

united-kingdom.svg

118 ms

germany.svg

germany.svg

113 ms

th_Hotelansicht_Sommer_2020_w640_id3397_1651581754.98.jpg

th_Hotelansicht_Sommer_2020_w640_id3397_1651581754.98.jpg

443 ms

th_Aufmacher_w640_id3182_1650455693.12.jpg

th_Aufmacher_w640_id3182_1650455693.12.jpg

450 ms

th_tesvolt_off_grid_farm_4_w640_id3150_1650455678.27.jpg

th_tesvolt_off_grid_farm_4_w640_id3150_1650455678.27.jpg

449 ms

testvolt-logo-claim-footer.svg

testvolt-logo-claim-footer.svg

335 ms

made_with_love.svg

made_with_love.svg

337 ms

XXIINeueNormCndExtraBold.woff

XXIINeueNormCndExtraBold.woff

487 ms

XXIINeueNormCndMedium.woff

XXIINeueNormCndMedium.woff

495 ms

Roboto-Light.woff

Roboto-Light.woff

585 ms

Roboto-Bold.woff

Roboto-Bold.woff

596 ms

Accessibility Review

tesvolt.com accessibility score

85

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

tesvolt.com best practices score

92

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

Missing source maps for large first-party JavaScript

SEO Factors

tesvolt.com SEO score

79

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tesvolt.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Tesvolt.com 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

tesvolt.com

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