Case Study 5: Anna Kirton, South Devon



Anna has a southeastern facing roof with 8 solar panels installed in 2018 giving her 4.8kW.

She would have had more panels installed at the time but has a big chimney in the middle of her roof which stopped this. Her two bedroom cottage in South Devon is lived in by her, her partner and her son and they chose an Everhot 110i for their kitchen.

Interestingly she told us that her solar panels were inset into her roof. She had a new roof put on at the same time and therefore, instead of being retrofitted, the panels were fitted as part of the new roof. She lives in an Area of Outstanding Natural Beauty and it was important to her that the solar panels weren't sticking out. 

She has one battery which cost her £8,000 at the time of installation. It is a Tesla Power Wall Second Generation which she also charges overnight when her electricity provider offers a cheaper tariff of 5p per kWh. During the day her 2022 rate is 25p per kWh and she uses Octopus Energy. 

When we spoke to Anna at the end of April 2022, her system reported that she had so far generated 660kWh this year through her solar panels. In total her electricity use within the house had been 2,427kWh and she had imported 1,967.4kWh from the Grid.  

Anna wasn't eligible for Feed in Tariffs when her solar panels were fitted, but believes she uses most of the power produced by her solar panels and has noticed the cost of her electricity bills falling over the last four years since installation. She pays in the region of £60 per calendar month and often finds herself in credit on her account. In her house she also has a log burner and uses oil for heating and hot water. 

Household: Two bed cottage
Number of Occupants: Three people 
Solar System Size: 4.8kW
Batteries: One single battery 
Everhot Model:  Everhot 110i 


Electricity-wise, they are probably slightly reduced users than your average three-person household with one TV, a fridge and fridge freezer, and a washing machine which is heat condensing and recycles its energy. She says, "I am a keen cook and get a lot of use from my Everhot. During the colder months I use the ECO settings overnight and then have the bottom oven on at 50 degrees, the top oven at 210 degrees and the hot plate at 310 degrees. In the summer I turn off the hot plate."

She tells us she is also considering an air source heat pump in the future.