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Cornish Renewables

Welcome to the Cornish Renewable Energy website. We are a Microgeneration Certification Scheme (MCS) registered renewable energy company, based in North Cornwall. Being a local company, we strive to provide excellent service during both the installation and guarantee period of your chosen technology.

  • 1MCS Registered
  • 2Solar PV
  • 3Air Source Heat Pumps
  • 4Solar Thermal
  • 5Rain Water Harvesting
  • 6Ground Source Heat Pumps
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About Us

At Cornish Renewable Energy, we have a strong belief in the technologies which we install. I have installed Solar thermal, Solar PV and an Air Source heat pump into my own property. Living with and using these technologies enables us to learn from real world ‘day to day’ experience. This enables us to give in-depth advice on the installation, and use of these exciting technologies.

Cornish Renewable Energy specialise in the installation of both Air and Ground Source Heat Pumps (ASHP / GSHP for space heating and hot water production), Solar Thermal (for hot water production) , Solar Photo Voltaic (PV for the production of electricity) and Rain water harvesting (harvested water is used to flush toilets, for outside taps and for washing machines).

With our background in heating design and installation, we can offer a complete service from the fitment of a heat pump in conjunction with solar Thermal or PV, to the complete installation of a new heating / hot water system.

If you would like to contact us for a free quotation, please either telephone or email. We endeavour to answer telephone calls between 8am and 5pm. If you do not get an answer please leave your details and someone will contact you as quickly as possible.

Our services

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    Air Source Heat Pumps

    • £850 grant available
    • No more costly Oil or LPG tank re-fills
    • Can be used all year round

    more

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    Ground Source Heat Pumps

    • £1250 grant available
    • No more costly Oil or LPG tank re-fills
    • Can be used all year round

    more

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    Solar Thermal

    • £300 grant available
    • Up to 60% of your hot water usage free
    • Reduce your CO2 emissions

    more

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    Solar PV

    • Get paid to produce electricity
    • Get paid to use electricity
    • Tax free and index linked for 20yrs

    more

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    Rain Water Harvesting

    • Reduce your ever increasing South West Water bills
    • Avoid hose pipe bans
    • Turn those rainy days into a positive

    more

Air Source Heat Pumps

Air source heat pumps (ASHPs) absorb latent heat from the air around them. This energy can then be used to heat your hot water, radiators and under floor heating. Even outside air temperatures below freezing are full of energy.

As the heat source – air – is freely available, ASHPs are very flexible as to the location in which they can be installed. They can be retro fitted, or installed as part of a new build project.

ASHPs work using a similar principle to that of a refrigerator running in reverse. Heat is absorbed from the outside air. This heat is then processed by the refrigeration system, which results in a higher temperature heat capable of heating your home and hot water.

Air source heat pumps have an efficiency of up to 400%, meaning that for every 1kw of electricity used to power the system 4kw of heat energy can be produced. In comparison, high efficiency gas condensing boilers have an efficiency rating of about 90%; older non condensing boilers can be as low as 65%.

ASHPs have a major advantage over Ground Source Heat pumps in that they are supplied as a neat box which is fitted outside of the property. There is no need to either dig up a large part of your garden, or bore holes deep into the earth. This is in contrast to Ground Source Heat Pumps.

Integrating ASHPs with other renewable technologies is rapidly becoming a viable solution for providing heat and hot water in every home. This is even more applicable if you live off of the mains gas network, as so many of us do here in Cornwall. The cost of LPG and especially Oil only ever seems to spiral upward.

If you would like further information or would like to discuss the possibilities of integrating renewable energy into your home or work place, please feel free to give us at Cornish Renewable Energy a call.

Ground Source Heat Pumps

Ground source heat pumps work by extracting the thermal energy from the earth to aid in the heating of your home. They use pipes buried in the garden of your home to extract heat from the ground. This heat is then used to heat your hot water, radiators and under floor heating.

The heat is extracted from the ground via a loop of pipe, filled with a mixture of water and antifreeze, buried in your garden. The coil of pipe is either laid flat in trenches about 2 metres deep, or if space is an issue, the pipe can be installed vertically to a depth of 100m.

The temperature of the ground beneath the surface stays fairly constant throughout the year, so ground source heat pumps can be used even in the middle of winter.

If you would like further information or would like to discuss the possibilities of integrating renewable energy into your home or work place, please feel free to give us at Cornish Renewable Energy a call.

Solar Thermal

The sun is by far the most abundant energy source available to us on earth. The energy, in the form of solar radiation, arriving on the earth’s surface in 40 minutes is the equivalent of the power used by the entire population of earth in one year.

Solar water heating is one of the most practical and effective ways in which we can use and enjoy renewable energy in our homes.

There is a widely held pre-conceived mis-conception that the UK does not have enough sunshine to make solar hot water plausible. The Meteorological Office has been recording solar data for the last 30 years and in fact parts of the UK have annual solar radiation levels equal to 60% of those experienced at the equator. That part of the UK is us down here in Cornwall.

A correctly installed solar domestic hot water system could provide up to 60% of your annual household water requirements, meaning your reliance on costly and damaging fossil fuels would be greatly reduced.

When specifying a solar thermal system, we only install Microgeneration Certification Scheme (MCS) approved collectors. Horizon Renewable Energy are MCS approved installers. This means that you, the customer will be able to claim any government Renewable Heat Incentive (RHI) payments when they are decided later this year. If your installation is carried out by a non-MCS registered company, you will not be eligible for any RHI grants.

If you would like further information or would like to discuss the possibilities of integrating renewable energy into your home or work place, please feel free to give us at Cornish Renewable Energy a call.

There are two different types of collector commonly used at present – Evacuated tube and flat plate.

Evacuated Tube
Evacuated tube solar panels are the highest performing solar panels. They offer solar gain even when conditions are cold and cloudy. Vacuum tubes tend to have 360 degree absorption using Compound Parabolic Compound (CPC) mirror technology. This means that they represent the maximum hot water output for the minimum of roof space.

Flat Plate
Flat Plate solar collectors consist of a dark flat-plate absorber of solar energy, a transparent cover that allows solar energy to pass through but reduces heat losses, a heat-transport fluid to remove heat from the absorber, and a heat insulating backing. A grid or coil of fluid tubing placed in an insulated casing is used to feed the glycol mixture through the collector and back to the hot water cylinder.

Most (if not all) vacuum tube collectors use heat pipes for their core instead of passing liquid directly through them. Evacuated heat pipe tubes (EHPTs) are composed of multiple evacuated glass tubes each containing an absorber plate fused to a heat pipe.4 The heat from the hot end of the heat pipes is transferred to the transfer fluid (water or an antifreeze mix—typically propylene glycol) of a domestic hot water or hydronic space heating system in a heat exchanger called a “manifold”. The manifold is wrapped in insulation and covered by a sheet metal or plastic case to protect it from the elements.

Solar PV

What is PV?

  • Solar Photovoltaic (PV) panels generate electricity.
  • PV panels are 1.65m high X 1m wide (approx)
  • Currently, 1 panel will produce about 250 watts of electricity (peak performance per hour)
  • A 2kW system = 8 panels, 3kW = 12 panels, 4kW = 16 panels (approx) and so on…..
  • PV panels can be either roof or ground mounted.
  • The electricity is generated by the sun’s radiation as opposed to direct sunlight, meaning that electricity is still produced on cloudy days.

How does it work?

  • PV panels are made up of individual cells that are wired together.
  • As radiation from the sun hits these cells, an electric field is produced.
  • The electric field is in the form of direct current (DC) and flows to an inverter.
  • The inverter converts the direct current (DC) into alternating current (AC).
  • Alternating current (AC) is what all of our household electrical items need to operate – washing machine, fridge, kettle, TV, air source heat pump etc.
  • Higher levels of solar radiation = higher levels of electricity production.
  • Surplus generated electricity is automatically fed back into the national grid.

What are the benefits?

  • Feed in Tariffs (FITs) – you will receive a set payment for the amount of electricity that you produce. As part of the PV installation, you will have your own generation meter. This will show exactly how much electricity has been generated in kWh’s. This is called your ‘Generation Tariff’. You simply tell your electricity provider the figure and they credit your account! Simple!
  • The current generation tariffs are set at:
    1. Systems up to 4kW = 15.44p/kWh
    2. Systems from 4kW up to 10kW = 13.99p/kWh
    3. Systems from 10kW up to 50kW = 13.03p/kWh
  • This is index linked, tax free and guaranteed for 20 years.
  • The generation meter only shows the amount of electricity that your PV panels have produced and not what you use, therefore even if you use every last watt of your generated electricity, you still get paid for all of it.
  • Export Tariffs – you will receive a further 4.5p/kWh from your energy supplier for the generated electricity that is exported back into the national grid. At present, the amount that you export cannot be easily monitored and is therefore estimated. The export estimation is 50% of the total generation. So basically you will get 15.44p/kWh for 100% of your generated electricity, and a further 4.5p/kWh for 50% of your generated electricity.
  • Electricity Bill Savings – generating your own electricity during daylight hours will reduce the amount of electricity you will need to purchase from your energy supplier. Clever usage of your electricity i.e. putting the washing machine and dishwasher on during the day, will help lower your electricity bills.
  • Index Linked – the generation and export tariffs are linked with the Retail Price Index (RPI). This means that your income from the feed in tariff will keep pace with inflation.
  • Tax Free – you won’t pay any tax on the feed in tariff payments.
  • You will receive your feed in tariff payments for a guaranteed 20 years.

If you would like further information or a free no obligation quotation detailing installation costs and projected feed in tariff returns, then please do not hesitate to contact us and we’d be happy to help.

Rain Water Harvesting

In the south west we tend to receive more than our fair share of rain at times, so why not collect, store and reuse this natural resource?

Harvested rain water can be used for non potable applications e.g flushing toilets, filling washing machines and feeding outside taps. This will help cut your household water consumption, during times of ever increasing water bills. We also feel that it is wasteful to be using expensive, treated water for washing cars, watering the garden and flushing toilets.

Simple explanation of operation

A rain water harvesting systems tends to consist of a tank buried in the ground, which is fed rain water from one of the downpipes serving your roof. As the water enters the tank it is passed through a filter, to remove leaves and general debris. There is a pump situated in the tank which is used to pump the rain water up to a storage cistern in you loft. If the outside storage tank runs dry, the system automatically switches to mains cold water supply. Any services which are to be fed via the rain water system are then connected to a gravity fed supply which is taken from the outlet of the cistern.

Each system is individually designed to meet the roof area’s catchment yield and household requirements.

If you would like further information or would like to discuss the possibilities of integrating renewable energy into your home or work place, please feel free to give us at Cornish Renewable Energy a call.

Contact Us

Camelford Contact

Wadebridge Contact

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Where we are

We have two offices, one in Wadebridge & one in Camelford. The contact details for both of these are on the left.