The US solar industry continues to grow strongly, and is likely to have added more capacity in 2013 than Germany – the first time it has done so in 15 years.

Yet 2013 was a worrying year for the trajectory of net-metering in the US, with powerful utilities in California and Colorado lobbying for changes, and Arizona’s energy regulator determining to begin imposing a monthly fee on owners of new PV systems in 2014.

Net-metering