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Testimonials and Case Studies


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Mitchellson - Formwork & Civil Engineering Ltd


We would like to congratulate you and all of your team for a job well done on the PV instalations at our premises in Horton; Berkshire and Arlesey; Bedfordshire.

Read the full letter from Ben Victory - Quality & Environment Manager for Mitchellson Formwork & Civil Engineering Ltd

September 2012

Charles Stickler


We are delighted with whole process from presales without the hard sell, just the information we needed, the installation was fast and efficient, the after sales was faultless. The whole team was a pleasure to do business with and we feel they are a very ethical company and can be relied upon. We would certainly recommend them and are glad we chose them to do the work.

Presalesstars   Installationstars   After Sales Supportstars

Teresa Auciello - Sales Director - Marlec Engineering Co Ltd


We highly recommend DJK Renewables for PV installations. As one of our longest standing installers they have developed a high level of competence and experience in residential and commercial installations. Our experience of them is that their procedures and operations are very professional and straightforward and this has been backed up by direct feedback we have had from satisfied customers.

We will be pleased to address any specific questions you may have relating to the business and its owners, Doug & Chris, should you care to contact us.

Mark Ludwig - Managing Director - WF Senate Electrical


Senate Electrical have traded with DJK for approximately 10 years – circa 5 years as a sole trader and the last 5 years as a Limited company. Payments are made promptly and their account is kept within our agreed trading terms. We have traded with the renewable arm of this company since February 2010 and we assisted with them becoming MCS accredited in August of the same year. DJK appear to keep up to date with technology changes in that DJK regularly attend training courses that we organise.

DJK were our partner in the production of a training and customer awareness DVD which demonstrated the installation of Solar PV products.

Senate Electrical are part of the Rexel Group, the world’s largest distributor of Electrical products. Further information can be found on our websites:

If I can be of any further assistance please do not hesitate to contact me.

PV Installation Return on Investment Case Study - Farnham, Surrey


To demonstrate the return on investment from a typical PV installation, DJK were contracted during the summer of 2011 to install an array consisting of 22 x 180wp panels on a south east facing front roof elevation in Farnham, Surrey. At the time we calculated an estimation of return on investment and after the first year we have compared the estimated returns with the actual returns. The results are as follows:

8 June 2011 to 8 June 2012 Estimate Actual
Output kWh 3253.540 kWh 3830.575 kWh
FIT rate per kWh £0.433 £0.433
FIT Generated Income £1408.78 £1658.81
Deemed Export Tariff Income £57.33
kWh avoided 85% (2765.51 x £0.12) 100% (3830.575 x £0.1132)
Avoided Cost £331.86 £433.62
Inflation Adjustment to FIT Income £22.32
Total Benefit £1,740.64 £2,114.75
Installation Cost    £15,863.37
Pay Back (Years) 9.11 7.58
Return on Investment 10.97% 13.2%