‘We’re better off without standards’
![](https://www.pv-magazine.com/wp-content/uploads/2020/04/04025-maxsolar-Pie31Pk_opt.jpeg)
A 6.5 kW rooftop installation near Dieburg. The ballast required to keep a photovoltaic system in place depends not least on the distance of the array from the roof’s edge and the parapet.
Image: Maxsolar
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