| CPC H02S 20/23 (2014.12) [E04D 3/30 (2013.01); H02S 20/25 (2014.12); H02S 20/26 (2014.12); H02S 40/32 (2014.12); H02S 40/34 (2014.12)] | 12 Claims |

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1. A roof panel comprising:
a rigid sheet of material for forming a structural roof, the rigid sheet of material being formed with a plurality of ridges having alternating crests and troughs, and strips of flexible solar material attached along a plurality of the crests of the ridges, wherein the strips of flexible solar material does not extend across the troughs between adjacent ridges of the plurality of ridges;
wherein the maximum height of at least one of the ridges above a lowermost plane of the rigid sheet of material is greater than 50 cm,
wherein each ridge is wide enough that it can accommodate, along its length, one of the strips of flexible solar material which is at least 1m wide, and
at least one inverter accommodated in one of the ridges on an underside of the roof panel.
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