San Mateo, California-based SolarCity installed 34% of the PV capacity that went onto residential roofs during the first half of the year, in a market expected to exceed 2GW for the whole of 2015.

Utah-based Vivint Solar – which is in the process of being acquired by SunEdison – was a distant second place, installing 12% of the US total.

The top five players were rounded out by San Francisco-based Sunrun, New Jersey-based NRG Home Solar, and Oakland-based Sungevity.

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