GREENER GUIDE

Helping you find the best renewable energy solution.

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Greener guide offers free and impartial advice on which renewable energy options are available to you.

In less than 5 minutes, our questionnaire will build a clear picture of your current situation and needs through a series of simple questions.

Answers from the questionnaire create a unique customer profile, and the results are used to build recommendations.

These detailed results are shared with you, to be used in conjunction with professional installers.

Products and Services

Solar PV

Solar PV panels can be mounted on roofs or the ground in order to absorb as much solar radiation as possible. They convert this solar radiation into DC electricity, Solar panels are made up of smaller units known as solar cells. The most common solar cells are made of silicon photocells. Each cell can generate electricity at about 0.5 volts and just a few Watts of power.

To generate electricity at higher, more useable voltages the cells are connected together to make modules. A number of modules are integrated onto a panel, and many panels can be fitted on the roof of a house. The panels are strung together and then connected to a solar inverter to convert the DC electricity into mains voltage AC electricity.

Air Source Heat Pumps

An air source heat pump consists of two parts, an outdoor unit and an indoor unit. It functions in the opposite way to a fridge. They can either work as a heating only device or a heating & cooling device.

The outdoor unit of the air source heat pump will take energy (heat) out of the ambient air by pulling the air through a fan. This outdoor air heats up a refrigerant to the point that, because of its extremely low boiling temperature, it boils and turns into gas. Once it has boiled, the refrigerant is pushed through a compressor, which heats it further to temperatures of around 60-70°C. This is then used to heat your hot water, radiators and underfloor heating.

Ground Source Heat Pumps

Ground source heat pumps work in much the same way as air source heat pumps, but instead of taking energy from the air, they take solar energy which is stored naturally in the ground throughout the year. This energy is used to increase the temperature in your home.

The heat pump uses pipes which are filled with an anti-freeze fluid that absorbs energy from the ground heat and transfers it to the heat pump indoors. This ground heat warms a refrigerant to the point that, because of its extremely low boiling temperature, it boils and turns into gas. Once it has boiled, the refrigerant is pushed through a compressor, which heats it further to temperatures of around 60-70°C. This is then used to heat your hot water, radiators and underfloor heating.

While this process does require some input of electrical power, you can typically expect to get 4 units of heat out, for every unit of electricity you put in. Because of this cost effective ratio, ground source heat pumps remain one of the most efficient forms of renewable energy in the UK, especially when combined with solar PV.

Biomass Boilers

Biomass is the general name for a range of organic materials, such as wood or dried plant material, which can be burnt to produce energy. As the biomass grows, it absorbs CO2 from the atmosphere and traps the carbon in the tree. This is then harvested and burnt in a biomass boiler, in order to provide heat for a home. Provided the biomass fuel that is burnt is replaced on a short-term cycle so that the CO2 produced is captured by new growth over the course of a few years in which it is replaced, the process sustainable and summed over about a dozen years is carbon neutral. The CO2 emissions from processing and transportation can be offset by growing more biomass than is required for fuel. Clearly the system is easier to make more sustainable if the fuel is locally sourced.

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