Renewable Case Studies
On the 12th March 2014 we installed a 4kW solar PV system for Mr H. of Upton near Poole. The system featured all black modules, Enphase micro inverters and an iBoost for free hot water. We predicted an annual generation of 3992 kW hours per year and it has achieved 4400 kW hrs which is 10% extra. Payback is under 6.7 years based on current prices and the feed in tariff is for twenty years, tax free and index linked. Import energy costs double every seven years according to the Energy Savings Trust.
On the 18th February 2014 we installed this 4kW solar PV system for Mr and Mrs Parsons. It featured all black Phono 250 modules with Enphase micro inverters.
We predicted it would generate 4000 hours per year and on its one year birthday it has produced 4510 hours which is 12.5% extra FIT payments and import savings.
This property also has a solar iBoost which diverts overproduction into the hot water immersion saving more import energy as the boiler has to work less.
On the 13 th February 2014 we installed this sixteen module Phono 4kW solar PV system for Dr and Mrs L. of Smannell near Andover.
We predicted an annual generation of 3500 hours per year using Enphase micro inverters with a twenty five year warranty and on-line individual monitoring capability.
After exactly one year it has generated 3870 kW hours which ten percent better than our our original SAP calculation.
This installation also featured a solar iBoost which diverts over generation of solar power into the immersion resulting in other import fuel savings.
This solar PV system provides a return on investment of over 13% per year on a twenty year contract which is index linked and tax free.
On the 11th February 2014 we installed this sixteen panel 250 watt Phono all black system for Mr and Mrs Smith in Upton near Poole. It is seven panels facing South with five facing West and four East all with the market leading Enphase micro inverters.
We predicted an annual generation of 3500 kW hours. On the 10th February 2015 it has produced 3920 kW hours which is 12% better than our original prediction.
Our original quotation included a prediction that this system would return in excess of £26,000 over the twenty years, based on our 3500 kW hours annual generation figure.
The initial outlay was less than £8000 and the equipment all comes with a twenty five year warranty.
On the 14th January 2014 we fitted this 4 kW sixteen panel solar PV system for Mr R. in Weymouth.
We predicted it would generate 4052 kW hours per year.
It has produced 4610 kW hours due to the market leading Enphase individual inverters.
This is a 13% better return on investment than predicted.
This is despite some shading from the chimney on four of the panels.
(email from customer dated 27.12.2014) (system installed 2010)
I thought you’d be interested to know what a splendid year the solar panels have had. For the 52 weeks to 27th December they produced 3,243 units (very considerably better than your original estimate of 2,606 p.a.) Let’s hope we get an equally sunny year next year!
Incidentally the system has only once produced less than 3,000 units in the year, and that was in 2012 when we had a rotten summer. That year the output hit an all-time low of 2,993 units, but still 10% better than the original estimate on which we made the decision to install.
On the 18th December 2012 we installed a 4kW solar PV system for Mr and Mrs H. in Ferndown, Dorset. This system had 20% shading from a large tree so we advised using the market leading Enphase individual micro inverters with a 25 year warranty. With micro inverters any shading or system failure is reduced to one panel, therefore maximising generation.
We predicted an annual return of 3286 kW hours.
In year one the system produced 4026 kW hours and in year two it produced 4176 kW hours. Both years are 20% more generation hours than our original prediction.
This customer also has a solar iBoost which gives any over generation to the immersion heater providing free hot water. This has resulted in a 38% reduction of import energy costs in addition to the feed in tariff payments.
In October 2014 we installed a 7.5 kW PV system mounted on pods on the flat roof. This installation included the Canadian ELPS modules with a cell efficiency of 21.1% and the market leading Enphase micro inverter system. All equipment comes with 25 year warranties. This single phase system has no dangerous high voltage DC cabling and is predicted to generate over 7000 kW hours of electricity and income and reduce the import energy costs. This medical centre now scores an impressive C on its energy performance certificate.
On the 6th July 2012 we completed the installation of fifty one Schott 195 Perform Mono modules onto the roof of the St. Helens Medical Centre near Ryde on the Isle of Wight. This was a single phase string inverter system with two German SMA inverters which was predicted to provide over 9000 kW hours per year.The system actually produced 9294 hours generating a FITS income of over £4600 in its first year and the electrical import costs have been reduced by 38% saving them a further £1200 a year.
On the 9th December 2013 we installed this 4kW Phono all black solar PV system with the market leading Enphase M215 micro inverters for Mr and Mrs B of Verwood, Dorset.
We predicted it would do 3890 hours a year, but after exactly one year it has done 4082 hours which is 105%.
Its best day was June the 17th when it did over 27 kilowatts.
This system provides a return on investment for this customer of over 12.6% annually. The feed in tariff is index linked and tax free and guaranteed for twenty years.
All the equipment is guaranteed for twenty five years.
The total return on this investment will be well over £25,000.