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alternergy.co.uk screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

alternergy.co.uk

Solar PV and Battery Storage Wholesaler & Distributor UK | Alternergy

Page Load Speed

4.7 sec in total

First Response

441 ms

Resources Loaded

3.2 sec

Page Rendered

1 sec

alternergy.co.uk screenshot

About Website

Click here to check amazing Alternergy content for United Kingdom. Otherwise, check out these important facts you probably never knew about alternergy.co.uk

Award-winning UK solar PV wholesaler, supplier and distributor for installers, offering solar panels, inverters, battery storage systems and PV mounting for residential and commercial installations.

Visit alternergy.co.uk

Key Findings

We analyzed Alternergy.co.uk page load time and found that the first response time was 441 ms and then it took 4.2 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

alternergy.co.uk performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value20.8 s

0/100

25%

SI (Speed Index)

Value13.6 s

2/100

10%

TBT (Total Blocking Time)

Value920 ms

30/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value30.1 s

0/100

10%

Network Requests Diagram

www.alternergy.co.uk

441 ms

calendar.css

40 ms

owl.carousel.css

29 ms

styles-m.css

55 ms

owl.carousel.css

26 ms

Our browser made a total of 235 requests to load all elements on the main page. We found that 95% of them (224 requests) were addressed to the original Alternergy.co.uk, 2% (5 requests) were made to Fonts.gstatic.com and 2% (4 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Alternergy.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 488.7 kB (10%)

Content Size

4.7 MB

After Optimization

4.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Alternergy.co.uk main page is 4.7 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. Only a small number of websites need less resources to load. Images take 3.6 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 281.9 kB

  • Original 313.9 kB
  • After minification 247.9 kB
  • After compression 32.0 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 66.0 kB, which is 21% 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 281.9 kB or 90% of the original size.

Image Optimization

-3%

Potential reduce by 109.8 kB

  • Original 3.6 MB
  • After minification 3.5 MB

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. Alternergy images are well optimized though.

JavaScript Optimization

-19%

Potential reduce by 91.2 kB

  • Original 487.6 kB
  • After minification 483.6 kB
  • After compression 396.3 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 91.2 kB or 19% of the original size.

CSS Optimization

-2%

Potential reduce by 5.8 kB

  • Original 239.9 kB
  • After minification 239.9 kB
  • After compression 234.2 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. Alternergy.co.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 152 (69%)

Requests Now

221

After Optimization

69

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 221 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Alternergy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 125 to 1 for JavaScripts and from 29 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.alternergy.co.uk

www.alternergy.co.uk

441 ms

calendar.css

calendar.css

40 ms

owl.carousel.css

owl.carousel.css

29 ms

styles-m.css

styles-m.css

55 ms

owl.carousel.css

owl.carousel.css

26 ms

jquery.fancybox.css

jquery.fancybox.css

28 ms

porto-icons-codes.css

porto-icons-codes.css

36 ms

simple-line-icons.css

simple-line-icons.css

38 ms

animation.css

animation.css

40 ms

font-awesome.min.css

font-awesome.min.css

40 ms

magnific-popup.css

magnific-popup.css

49 ms

magnific-animation.css

magnific-animation.css

52 ms

amslick.min.css

amslick.min.css

88 ms

brippo.css

brippo.css

88 ms

style.css

style.css

90 ms

blog-m.css

blog-m.css

92 ms

blog-new.css

blog-new.css

91 ms

blog-custom.css

blog-custom.css

92 ms

styles-l.css

styles-l.css

92 ms

require.js

require.js

92 ms

disabled.js

disabled.js

109 ms

mixins.js

mixins.js

110 ms

requirejs-config.js

requirejs-config.js

109 ms

css

css

33 ms

settings_default.css

settings_default.css

117 ms

css

css

86 ms

css

css

87 ms

css

css

88 ms

bootstrap.optimized.min.css

bootstrap.optimized.min.css

129 ms

animate.optimized.css

animate.optimized.css

130 ms

custom.css

custom.css

134 ms

design_default.css

design_default.css

131 ms

settings_default.css

settings_default.css

132 ms

email-decode.min.js

email-decode.min.js

121 ms

jquery.js

jquery.js

206 ms

common.js

common.js

203 ms

dataPost.js

dataPost.js

202 ms

bootstrap.js

bootstrap.js

200 ms

app.js

app.js

202 ms

form-key-provider.js

form-key-provider.js

199 ms

messages.js

messages.js

203 ms

mage-translation-dictionary.js

mage-translation-dictionary.js

204 ms

theme.js

theme.js

200 ms

gtm.js

gtm.js

454 ms

Alternergy_Logo.svg

Alternergy_Logo.svg

273 ms

Phone_Blue.svg

Phone_Blue.svg

272 ms

searchgrey.svg

searchgrey.svg

139 ms

MyAccount_Blue.svg

MyAccount_Blue.svg

271 ms

Login_Blue.svg

Login_Blue.svg

286 ms

ShoppingBasket_Blue.svg

ShoppingBasket_Blue.svg

285 ms

AcePV_Sidebanner_301x467px_150dpi.jpg

AcePV_Sidebanner_301x467px_150dpi.jpg

287 ms

AcePV_Sidebanner_301x251_72dpi_1.jpeg

AcePV_Sidebanner_301x251_72dpi_1.jpeg

352 ms

Viridian_banner_Desktop-Alternergy-1600px_2.jpg

Viridian_banner_Desktop-Alternergy-1600px_2.jpg

433 ms

Viridian_Intro_Perm_Banner_Mobile_500x183px_1.jpg

Viridian_Intro_Perm_Banner_Mobile_500x183px_1.jpg

433 ms

Alternergy_May27_Bankholiday_Banner_Desktop_1600x110px_ALT.jpg

Alternergy_May27_Bankholiday_Banner_Desktop_1600x110px_ALT.jpg

353 ms

Alternergy_May27_Bankholiday_Banner_Mobile_650x310px.jpg

Alternergy_May27_Bankholiday_Banner_Mobile_650x310px.jpg

352 ms

offers-v2-alternergy.jpg

offers-v2-alternergy.jpg

352 ms

Suntech_420_Watt_Ultra_V_Mini_N-Type_full_black_Alternergy3C.jpg

Suntech_420_Watt_Ultra_V_Mini_N-Type_full_black_Alternergy3C.jpg

419 ms

Tripower_X_Alternergy3C.jpg

Tripower_X_Alternergy3C.jpg

421 ms

Tigo_Alternergy3C.jpg

Tigo_Alternergy3C.jpg

420 ms

Huawei_Luna_2000_5_KW_Battery_System_Alternergy3C.jpg

Huawei_Luna_2000_5_KW_Battery_System_Alternergy3C.jpg

420 ms

K2_Alternergy3C2.jpg

K2_Alternergy3C2.jpg

421 ms

Other_Accessories3.jpg

Other_Accessories3.jpg

422 ms

SMA_EV_Charger_Alternergy3C.jpg

SMA_EV_Charger_Alternergy3C.jpg

423 ms

Viridian-banner-Alternergy.jpg

Viridian-banner-Alternergy.jpg

424 ms

Sigenergy-banner-Alternergy.jpg

Sigenergy-banner-Alternergy.jpg

426 ms

Solarwatt_banner-Alternergy.jpg

Solarwatt_banner-Alternergy.jpg

424 ms

growatt_ark_xh_system3-1w.jpg

growatt_ark_xh_system3-1w.jpg

427 ms

huawei1phbatterybundlenew_1.jpg

huawei1phbatterybundlenew_1.jpg

427 ms

sungrow_battery_plus_inverter_04_1.jpg

sungrow_battery_plus_inverter_04_1.jpg

428 ms

Roboto-Thin.ttf

Roboto-Thin.ttf

818 ms

Roboto-Light.ttf

Roboto-Light.ttf

780 ms

Roboto-Regular.ttf

Roboto-Regular.ttf

777 ms

Roboto-Medium.ttf

Roboto-Medium.ttf

351 ms

Roboto-Bold.ttf

Roboto-Bold.ttf

403 ms

sw_megamenu.js

sw_megamenu.js

400 ms

mfblogunveil.js

mfblogunveil.js

400 ms

domReady.js

domReady.js

400 ms

growatt-apx-battery-alternergy_1.jpg

growatt-apx-battery-alternergy_1.jpg

400 ms

growatt-apx-14.3p-b1-battery.jpeg

growatt-apx-14.3p-b1-battery.jpeg

401 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVc.ttf

201 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4uaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4uaVc.ttf

201 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1x4uaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1x4uaVc.ttf

265 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVc.ttf

267 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4uaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4uaVc.ttf

267 ms

jquery-mixin.js

jquery-mixin.js

215 ms

porto-icons.woff

porto-icons.woff

645 ms

main.js

main.js

284 ms

bootstrap.js

bootstrap.js

282 ms

template.js

template.js

284 ms

confirm.js

confirm.js

283 ms

widget.js

widget.js

283 ms

mage.js

mage.js

220 ms

translate.js

translate.js

234 ms

jquery.sticky.min.js

jquery.sticky.min.js

233 ms

text.js

text.js

237 ms

types.js

types.js

171 ms

layout.js

layout.js

182 ms

smart-keyboard-handler.js

smart-keyboard-handler.js

183 ms

jquery.lazyload.js

jquery.lazyload.js

196 ms

owl.carousel.min.js

owl.carousel.min.js

197 ms

hv_system4-2w.jpg

hv_system4-2w.jpg

229 ms

huawei1phbatterybundlenew.jpg

huawei1phbatterybundlenew.jpg

208 ms

growatt_axe_5.0_system-hybrid-ac1w_1.jpg

growatt_axe_5.0_system-hybrid-ac1w_1.jpg

223 ms

sigenstor_battery00-alternergy_1.jpg

sigenstor_battery00-alternergy_1.jpg

237 ms

sigenstor_battery00-alternergy.jpg

sigenstor_battery00-alternergy.jpg

239 ms

growatt_3.3kwh_ac_solar_battery_alternergy-3_1_1.jpg

growatt_3.3kwh_ac_solar_battery_alternergy-3_1_1.jpg

247 ms

solar_battery_growatt_sph3600_6.5kwh_alternergy_4.jpg

solar_battery_growatt_sph3600_6.5kwh_alternergy_4.jpg

251 ms

growatt_-alp-lv-battery-alternergy_1.jpg

growatt_-alp-lv-battery-alternergy_1.jpg

259 ms

AboutAlternergytick128x128T3.png

AboutAlternergytick128x128T3.png

264 ms

k2-base-alternergy-press-release2.jpeg

k2-base-alternergy-press-release2.jpeg

269 ms

clym.js

clym.js

105 ms

k2-base-alternergy-press-release.jpeg

k2-base-alternergy-press-release.jpeg

229 ms

Alternergy_FusionSolar_Partnership_757x456px2.jpg

Alternergy_FusionSolar_Partnership_757x456px2.jpg

237 ms

Alternergy_FusionSolar_Partnership_757x456px.jpg

Alternergy_FusionSolar_Partnership_757x456px.jpg

246 ms

Bifacial_Solar_Panel12.jpg

Bifacial_Solar_Panel12.jpg

250 ms

Bifacial_Solar_Panel1.jpg

Bifacial_Solar_Panel1.jpg

262 ms

Sigenstor02-Alternergy-757x4563.jpg

Sigenstor02-Alternergy-757x4563.jpg

262 ms

Sigenstor02-Alternergy-757x456_3.jpg

Sigenstor02-Alternergy-757x456_3.jpg

275 ms

IP_Rating12.jpg

IP_Rating12.jpg

191 ms

IP_Rating1.jpg

IP_Rating1.jpg

207 ms

TOPCon_Cells3-Alternergy-757x456_12.jpg

TOPCon_Cells3-Alternergy-757x456_12.jpg

212 ms

TOPCon_Cells3-Alternergy-757x456_3.jpg

TOPCon_Cells3-Alternergy-757x456_3.jpg

221 ms

ENA_G100-3_1.png

ENA_G100-3_1.png

229 ms

ENA_G100-3_1.png

ENA_G100-3_1.png

246 ms

popupManager.js

popupManager.js

235 ms

weltpixel_ga4_persistentlayer.js

weltpixel_ga4_persistentlayer.js

273 ms

weltpixel_ga4_gtm.js

weltpixel_ga4_gtm.js

272 ms

wrapper.js

wrapper.js

270 ms

knockout.js

knockout.js

270 ms

knockout-es5.js

knockout-es5.js

256 ms

underscore.js

underscore.js

256 ms

modal.js

modal.js

242 ms

customer-data.js

customer-data.js

291 ms

customer-data-mixin.js

customer-data-mixin.js

279 ms

engine.js

engine.js

266 ms

bootstrap.js

bootstrap.js

260 ms

observable_array.js

observable_array.js

251 ms

bound-nodes.js

bound-nodes.js

248 ms

scripts.js

scripts.js

239 ms

version.js

version.js

236 ms

js-translation.json

js-translation.json

1332 ms

main.js

main.js

221 ms

registry.js

registry.js

214 ms

console-logger.js

console-logger.js

207 ms

Daisy-Chain-Leapfrog8-Alternergy-757x4562.jpg

Daisy-Chain-Leapfrog8-Alternergy-757x4562.jpg

197 ms

MCS_012_Comp_Alternergy757x4562.jpeg

MCS_012_Comp_Alternergy757x4562.jpeg

188 ms

MCS_012_Comp_Alternergy757x456_3.jpeg

MCS_012_Comp_Alternergy757x456_3.jpeg

184 ms

Hyundai-shingled-cell-solar-panel757x456.jpg

Hyundai-shingled-cell-solar-panel757x456.jpg

173 ms

Hyundai-shingled-cell-solar-panel757x456_1.jpg

Hyundai-shingled-cell-solar-panel757x456_1.jpg

172 ms

originalmc4-mismatch-757x456_1.jpg

originalmc4-mismatch-757x456_1.jpg

162 ms

originalmc4-mismatch-757x456_2.jpg

originalmc4-mismatch-757x456_2.jpg

158 ms

Solar_Farm_for_Blog-by-Alternergy_757x4562.jpg

Solar_Farm_for_Blog-by-Alternergy_757x4562.jpg

146 ms

Solar_Farm_for_Blog-by-Alternergy_757x456_1.jpg

Solar_Farm_for_Blog-by-Alternergy_757x456_1.jpg

141 ms

Alternergy_Logo_White.png

Alternergy_Logo_White.png

1223 ms

_FooterIcon_Linkedin.png

_FooterIcon_Linkedin.png

1216 ms

jquery.magnific-popup.js

jquery.magnific-popup.js

1205 ms

FooterTwi_Alternergy_Twitter.png

FooterTwi_Alternergy_Twitter.png

1201 ms

_FooterIcon_Facebook.png

_FooterIcon_Facebook.png

1161 ms

local.js

local.js

1057 ms

modal-popup.html

modal-popup.html

1058 ms

modal-slide.html

modal-slide.html

1056 ms

modal-custom.html

modal-custom.html

1058 ms

key-codes.js

key-codes.js

1055 ms

core.js

core.js

1054 ms

z-index.js

z-index.js

1054 ms

section-config.js

section-config.js

44 ms

url.js

url.js

45 ms

storage.js

storage.js

43 ms

storage-wrapper.js

storage-wrapper.js

45 ms

knockout-repeat.js

knockout-repeat.js

43 ms

knockout-fast-foreach.js

knockout-fast-foreach.js

42 ms

events.js

events.js

40 ms

renderer.js

renderer.js

31 ms

resizable.js

resizable.js

20 ms

i18n.js

i18n.js

20 ms

scope.js

scope.js

20 ms

range.js

range.js

19 ms

mage-init.js

mage-init.js

29 ms

keyboard.js

keyboard.js

30 ms

optgroup.js

optgroup.js

30 ms

after-render.js

after-render.js

30 ms

autoselect.js

autoselect.js

30 ms

datepicker.js

datepicker.js

31 ms

outer_click.js

outer_click.js

33 ms

fadeVisible.js

fadeVisible.js

33 ms

collapsible.js

collapsible.js

35 ms

staticChecked.js

staticChecked.js

40 ms

simple-checked.js

simple-checked.js

42 ms

bind-html.js

bind-html.js

38 ms

tooltip.js

tooltip.js

44 ms

color-picker.js

color-picker.js

38 ms

observable_source.js

observable_source.js

44 ms

arrays.js

arrays.js

51 ms

compare.js

compare.js

49 ms

misc.js

misc.js

49 ms

objects.js

objects.js

52 ms

strings.js

strings.js

53 ms

template.js

template.js

55 ms

logger.js

logger.js

60 ms

entry-factory.js

entry-factory.js

61 ms

console-output-handler.js

console-output-handler.js

63 ms

formatter.js

formatter.js

61 ms

message-pool.js

message-pool.js

59 ms

levels-pool.js

levels-pool.js

58 ms

logger-utils.js

logger-utils.js

66 ms

data.js

data.js

67 ms

disable-selection.js

disable-selection.js

65 ms

focusable.js

focusable.js

67 ms

form.js

form.js

75 ms

ie.js

ie.js

77 ms

keycode.js

keycode.js

76 ms

labels.js

labels.js

86 ms

jquery-patch.js

jquery-patch.js

70 ms

plugin.js

plugin.js

79 ms

safe-active-element.js

safe-active-element.js

79 ms

safe-blur.js

safe-blur.js

80 ms

scroll-parent.js

scroll-parent.js

82 ms

tabbable.js

tabbable.js

90 ms

unique-id.js

unique-id.js

90 ms

js.storage.js

js.storage.js

85 ms

async.js

async.js

91 ms

loader.js

loader.js

87 ms

spectrum.js

spectrum.js

92 ms

tinycolor.js

tinycolor.js

101 ms

tooltip.html

tooltip.html

169 ms

class.js

class.js

90 ms

entry.js

entry.js

69 ms

moment.js

moment.js

85 ms

jquery.cookie.js

jquery.cookie.js

35 ms

dom-observer.js

dom-observer.js

26 ms

bindings.js

bindings.js

26 ms

cookie-wrapper.js

cookie-wrapper.js

13 ms

js.cookie.js

js.cookie.js

14 ms

print.css

print.css

33 ms

Accessibility Review

alternergy.co.uk accessibility score

72

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible 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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

alternergy.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

alternergy.co.uk SEO score

73

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

High

Tap targets are not sized appropriately

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 Alternergy.co.uk 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 Alternergy.co.uk 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

alternergy.co.uk

Open Graph description is not detected on the main page of Alternergy. 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: