1.6 sec in total
142 ms
938 ms
554 ms
Click here to check amazing NREL content for United States. Otherwise, check out these important facts you probably never knew about nrel.gov
The only federal laboratory dedicated to research, development, commercialization, and deployment of renewable energy and energy efficiency technologies.
Visit nrel.govWe analyzed Nrel.gov page load time and found that the first response time was 142 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.
nrel.gov performance score
name
value
score
weighting
Value3.9 s
25/100
10%
Value10.6 s
0/100
25%
Value5.9 s
47/100
10%
Value12,980 ms
0/100
30%
Value0.214
58/100
15%
Value23.8 s
1/100
10%
142 ms
7 ms
50 ms
26 ms
12 ms
Our browser made a total of 32 requests to load all elements on the main page. We found that 63% of them (20 requests) were addressed to the original Nrel.gov, 13% (4 requests) were made to Maxcdn.bootstrapcdn.com and 13% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (391 ms) belongs to the original domain Nrel.gov.
Page size can be reduced by 293.7 kB (17%)
1.7 MB
1.5 MB
In fact, the total size of Nrel.gov main page is 1.7 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 1.4 MB which makes up the majority of the site volume.
Potential reduce by 19.8 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 6.6 kB, which is 27% 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 19.8 kB or 80% of the original size.
Potential reduce by 10.9 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. NREL images are well optimized though.
Potential reduce by 112.9 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 112.9 kB or 65% of the original size.
Potential reduce by 150.1 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. Nrel.gov needs all CSS files to be minified and compressed as it can save up to 150.1 kB or 82% of the original size.
Number of requests can be reduced by 11 (42%)
26
15
The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NREL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
www.nrel.gov
142 ms
bootstrap.min.css
7 ms
nrel.complete.min.css
50 ms
css
26 ms
font-awesome.min.css
12 ms
jquery.min.js
30 ms
hp.min.css
91 ms
bootstrap.min.js
11 ms
jquery.newsy.min.js
108 ms
jquery.iconomatic.min.js
90 ms
jwplayer.js
146 ms
hp.app.min.js
108 ms
nrel.js
46 ms
icon-leaf.svg
66 ms
icon_chem-mat-science.svg
68 ms
icon_truck.svg
70 ms
hp-feat-models-tools-30450.jpg
379 ms
hp-feat-maps-data.jpg
341 ms
logo_doe_footer.svg
192 ms
nrel_logo.png
107 ms
2UX7WLTfW3W8TclTUvlFyQ.woff
22 ms
Hgo13k-tfSpn0qi1SFdUfT8E0i7KZn-EPnyo3HZu7kw.woff
39 ms
d-6IYplOFocCacKzxwXSOD8E0i7KZn-EPnyo3HZu7kw.woff
105 ms
analytics.js
26 ms
news.cfc
81 ms
news.cfc
65 ms
collect
24 ms
QQt14e8dY39u-eYBZmppwTqR_3kx9_hJXbbyU8S6IN0.woff
13 ms
fontawesome-webfont.woff
13 ms
20160223-25899-feat_hp_@2x.jpg
225 ms
hp-feat-30601_@2x.jpg
132 ms
20160208-dld-33897_hp_@2x.jpg
391 ms
nrel.gov accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
nrel.gov best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
nrel.gov SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nrel.gov 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 Nrel.gov 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.
nrel.gov
Open Graph description is not detected on the main page of NREL. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: