Hi Dave
Sun Systems UK went pop around 2011. They were a rebranded system from a German manufacturer, but I cannot for the life of me remember the original manufacturer’s name.
We’ve not sold any flat-plate panels since 2012 as PV is now our recommendation, but a good UK flat-plate manufacturer is:
Hope this helps.
New world savvy.
"I've witnessed many fantastic changes, innovations, and installation companies come and go. My fellowship with ethically-minded MCS solar panel installers goes back decades. Today, I offer my experience to ensure you gain real independence from this crazy geopolitical world."
Stuart Lovatt
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Est. 2004.