sunology.de website review

10 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.3 s.

A phone's processor spends 4.9 s on main-thread work while loading, 2.4 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (hcaptcha.com, Clarity and Yotpo and others), adding 2.0 MB and 1.1 s of main-thread time.

About 930 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 300 ms faster on a phone.

Your mobile performance score is 56. Pages that score under 90 lose visitors before the first paint.

29 files are served with short cache lifetimes, so returning visitors download them again (764 KiB).

hcaptcha.com costs a phone 645 ms of main-thread work and 1.2 MB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

About 129 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 450 ms faster on a phone.

11 long tasks block the main thread while loading, the longest for 180 ms. During a long task the page ignores taps.

3 images could be 101 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

Polyfills for old browsers add 45 KiB JavaScript that modern phones do not need.

12 KiB could be saved by minifying JavaScript.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

3 KiB could be saved by minifying CSS.

The page becomes fully interactive after 38.3 s. Good is under 3.8 s.

Your largest element takes 8.4 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Technologies solaires françaises : kit plug & play, batteri…”.

Visually, the page fills in at 11.8 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 404 ms in total while the page loads. Good is under 200 ms.

3 images have no width and height attributes, so the layout jumps as each one loads.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 172 ms to 189 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 1.6 s to 1.7 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 6.7 MB in 400 requests on a phone: scripts 3.1 MB (138), images 1.3 MB (41) and other files 985 KiB (181). Under 2 MB keeps phones on slow connections fast.

2 images (126 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 1.91 g of CO₂e: 229.1 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

3 buttons have no accessible name, so screen readers announce just “button”.

13 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

1 frame has no title, so screen-reader users cannot tell what it contains.

2 images have no alt text, which hurts accessibility and image search.

The viewport tag blocks pinch-zoom, which low-vision visitors rely on.

10 visible links have no text or label, so screen readers cannot say where they go.

4 form fields have no label, so screen readers announce an empty box and autofill guesses.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

Your meta description is 313 characters; Google truncates after about 160, so the end of your pitch is cut.

Open Graph is missing og:title and og:description, so shared links fall back to guesses.

No twitter:card tag. X falls back to Open Graph, which is incomplete here.

The homepage links to 90 pages on sunology.de and 12 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

We fetched 15 pages linked from your homepage (of 29 found) and read each the way a search engine does.

1 image failed to load on a phone, for example https://bat.bing.com/action/0?ti=343055743&tm=gtm002&Ver=2&mid=4f8133c3-a246-4bae-beb9-8e4955bb007c&bo=1&sid=e50662d0da7e11f1862523bb47536c59&vid=e5068830da7e11f1bdb44f109628458b&vids=1&msclkid=N&gtm_.

The page uses 1 deprecated browser API that will stop working in future browsers (“Unload event listeners are deprecated and will be removed.”).

4 errors were logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

Large scripts ship without source maps.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 694 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Klaviyo and LinkedIn Insight and 5 mores (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 31 cookies, 2 of them by other companies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 51 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.