Requirements for rooftop photovoltaic installation without support

no higher than four metres;at least 5m from boundaries;size of array is limited to 9m 2 or 3m wide and 3m deep;should not be installed within boundary of a listed building;in the case of land in a conservation area or in a World Heritage Site it should not be visible from the highway;only one standalone solar installation is permitted. [pdf]
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Connecting to photovoltaic combiner box

Mount the combiner box and secure it with four screws, as shown below. Use 4–10 mm2, 600 V insulated cables. Strip 8 mm of cable insulation. Ground the combiner box by connecting it to the inverter. [pdf]