We have ‘m’, the solar tester quality mark! This is the only independent quality mark for installers of solar energy. That means that we: being trustworthy, have knowledge of things, our processes are in order, have sufficient experience to be able to properly advise you.   Zonneage is the Dutch quality mark for solar energy. It gives you guidance in the search for reliable products and installers in the field of solar energy. You can count on products and companies that carry the Solar Test.

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