Offgridtec: Google PageSpeed from 45 to 93
A huge catalogue of heavy solar photos dragged the shop down to PageSpeed 45 on mobile. We optimised it layer by layer – without changing the design.
The starting point
Offgridtec sells solar systems and off-grid energy products on Shopware 6. The catalogue holds more than 2,000 product images. On mobile, the shop scored only 45 on Google PageSpeed, and Largest Contentful Paint was 4.8 seconds.
On mobile, visitors decide within seconds whether to stay. Every second of waiting costs conversions – and with paid traffic, ad budget too. On top of that, Google rates load time through the Core Web Vitals.
The challenge
The shop had to get fast without changing the design. And Shopware updates must not wipe the entire cache every time.
- !More than 2,000 heavy product images in the catalogue
- !Mobile PageSpeed of only 45, Largest Contentful Paint 4.8 seconds
- !Shopware updates must not wipe the entire cache every time
- !The design had to stay unchanged
What we did
Without changing the design.
Over 2,000 product images converted to AVIF automatically and served responsively.
Why it works: AVIF produces much smaller files than JPEG or PNG at the same image quality. Responsive means every device only loads the image size it actually displays.
Learn more →Render-blocking CSS and JavaScript eliminated – 62% less JavaScript. Largest Contentful Paint dropped from 4.8 to 1.1 seconds.
Why it works: The browser loads what is needed in the visible area first. Scripts and content further down follow without blocking the page from rendering.
Learn more →On Shopware updates, only changed products are purged from the cache automatically – everything else stays cached.
Why it works: Pages are cached on servers close to the visitor and delivered from there instantly, instead of being rebuilt by the shop system on every request.
Learn more →The result
Mobile PageSpeed rose from 45 to 93. Largest Contentful Paint dropped from 4.8 to 1.1 seconds, and pages are 82% lighter.
Measured with Google PageSpeed Insights (mobile).
At 93, the shop is in Google PageSpeed’s green range (90 and up). And it stays fast after Shopware updates, because the cache stays warm.
Our approach
We analyse the website and show where time is lost.
We integrate the complete FlashSites solution. Nobody has to touch any code.
The website loads in under a second – on every device. Monitored continuously.
