Mr and Mrs Allen had a 4kW all black Mono system with Enphase inverters fitted on 21st November 2013.
It was predicted to produce 4052 kW hours.
On the 20th November 2014, after exactly one year it had produced 4280 kW.
That is enough energy to run 416 homes for one day and offset 3.06 tons of carbon which is equivalent to 77 trees.
This home is now rated as a B 86 on its Energy Performance Certificate.