marks the start of the most important enterprise we shall ever
conduct...And it won't make us a penny. To reflect growing
Global concerns about Climate Change we now offer our current and future
Clients a 'Carbon Neutral' Service. Our head Office at Krofire House is now
powered by Solar Power......
House - Solar Power Station
August 2005 Krofire House had Photovoltaics Installed
Energy globally is potentially equal to 1.54 peta kWh/year (that
is 1,540 followed by fifteen zeroes)
peta kWh/year is 15,000 times more than human electrical
consumption in a year
Bequerel first discovered the photo voltaic effect in 1839
cells generate electricity from sunlight (of course) - even when
it is cloudy. The Krofire Solar Power Station should generate well
over 1000 units per year, roughly a quarter of our requirements
we generate more than we need we sell the excess back to the Power
Company at £0.05p/Unit plus the installation qualifies for
roughtly two Renewables Obligation Certificates (ROC's) per year
at about £49 each. ROC's are part of the Government's Carbon
The results so far:
Thru 2005, 2006 and 2007 we have been measuring the
performance of this system.
Coupled with other (smaller) energy saving schemes
(such as Energy Saving light bulbs) we have saved 36% off our direct
What is more we are earning between £80 and £100 back
off our supplier every year at wholesale prices
Conservatively we estimate that means the Solar
Panels actually provide 50 to 60% of all our Electricity
This is working ar better than our wildest dreams
Our Electricity Supplier (NPower) wanted to fit an
Export Meter but failed. They claimed there was insufficient room in
the Meter Box!
However, we have fitted our own "Electrisave" device
which clearly shows the power being generate NET of our own needs.
(Ironicaly it can't show the direction of Elecricity travel.)
At midday on any sunny day the Electrisave shows us
pumping out over 1kw of power back into the Grid
What the Photo-Voltaic Installation looks
This side of the roof is south facing.
Note that the Solar Panels only cover about half of the available space.
There is plenty of room left for a future upgrade with further panels.
The panels themselves only stop generating power at night. They will
generate power all year around.
we see the panels looking the other direction. At this point the
gentlemen from Chiltern Future Energy had finished and left the site.
The Scaffolders did not come round to retrieve their poles until the
Fronius Inverter mounted on the end wall in the Attic. It has two
isolating switches, one in (DC) and one out (AC). The Inverter matches the
Voltage and AC Frequency to that of the local Mains supply allowing us
to sell excess energy back to the Power Company.
Mains Junction Box where the AC joins the National Grid and the Krofire House
Power Supply. Hence the energy can flow into Krofire House or out to the
National Grid if we use less than is generated.
Installation at Krofire House consists of:
x 125Wp Kyocera Polycrystalline modules (total of 1.5 kWp) -
[kWp = kilo-watt peak] at a total cost of £4560
were installed by Chiltern Future Energy, Broad Oak, Rignall
Road, Great Missenden, Buckinhamshire, HP16 9PE
'Inverter' is also required that converts the Direct Current
(DC) from the Solar Cells into Alternating Current (AC) at the
same frequency and voltage as Mains. Chiltern Future Energy
installed a Fronius IG15 Inverter at a cost of £1180
rest of the costs were for roof fixings, module framing,
scaffolding and display meter plus Mechanical and Electrical
Installation came to £1495
VAT at 5% the total cost came to £7596.75 but half the cost is
covered by a Government Grant from the Energy Savings Trust
(EST). Contact the EST at 21 Dartmouth Street, London W1H 9BP
Tel: 020 7222 0101 Fax: 020 7654 2444
installation went in over the first week of August 2005 after
some delays by both the Scaffolders and the Solar Cell
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chosen destination in the list below:
us at: Krofire House, 5 Richard Gardens, High Wycombe, Buckinghamshire,
HP13 7LT, United Kingdom, Tel: +44 (0)1494 522749, Fax: +44
(0)1494 522749, Mobile: +44 (0)7775 767109.
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