Renewable Energy Solutions


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Celtic Green Energy : Low Carbon Logo
Celtic Green Energy : Solar Power
Celtic Green Energy : Savings and finance

Are you concerned about the ongoing uncertainty surrounding rising energy prices? Let us provide you with peace of mind: Solar Energy derived from sunlight remains consistently free!

At Celtic Green Energy, we offer a solution that not only addresses environmental concerns but also provides a cost-effective alternative amidst fluctuating prices. By installing solar panels on your property, you can harness the power of Photovoltaic (PV) technology to capture the sun’s energy and convert it into electricity for your home’s consumption.

In addition to enjoying clean energy from sustainable sources, you may also have the opportunity to earn financial returns by feeding surplus power back into the National grid. Moreover, with the option to store excess electricity using energy storage batteries, you can ensure uninterrupted savings and self-sufficiency, even after sunset.

Make the switch to solar with Celtic Green Energy and embark on a journey towards a brighter, more sustainable future!

Use Solar Energy to Power your Day

You can use solar energy to power a multitude of appliances during the day subject to your power consumption and usage.

For energy needs after dark, you will need to source your power from the national grid or energy from solar batteries.

Celtic Green Energy : Washing machine and kitchen electrical appliances powered by solar energy

Domestic Appliances

Power your washing machines, microwaves

Celtic Green Energy : Television and electrical appliances powered by solar energy


Power your televisions, radios and computers

Celtic Green Energy : EV charging installation

EV Vehicle Charging

Recharge your electric vehicles with solar


Electric Power Tools

Power your tools with solar energy

Celtic Green Energy : Electric Lighting solutions


Power your lighting during the day

Heater Logo


Power your electric heaters 

Celtic Green Energy Solar PV Ground Mount

What are Solar PV panels?

Solar Photovoltaic (PV) panels are made from layers of semi-conducting material that generates electricity when light shines on the surface. 

The cells work using minimal light even on cloudy days, but work best with strong sunshine when more electricity is created. Solar PV systems are made up of several panels, with each panel generating around 355W of energy in strong sunlight. Typical systems contain around 10 panels and generate direct current (DC) electricity. Because the electricity used for household appliances is alternating current (AC), an inverter is installed along with the system to convert DC electricity to AC. This electricity can be used throughout your home, or exported to the grid.

How do Solar PV Panels Work?

Solar PV panels work during daylight hours generating electricity – even on cloudy days. 

Celtic Green Energy Inline Roof
Celtic Green Energy Inline Roof

If you use more power around your home than your panels are generating, or during the evening when your panels are not generating any electricity, you can supplement this by importing electricity from the grid. Conversely, if you generate more electricity than you use or want to store – you can feed electricity back to the national grid and receive a payment for every unit of electricity you export. This is achieved under the Government’s Smart Export Guarantee, the details are available here.

Solar Powered energy is best used during daylight hours when sunlight is at it’s brightest and an ideal time to run electrical appliances such as washing machine, dishwashers, and ironing. Use delayed start timers on major appliances or smart timers for others when you are not at home.

Sunproduction Graph

Solar PV panels will generate electricity all year round, the above charts a typical 4kw system based on 2022 figures at our Crosshands base in South Wales. Figures supplied by the EU commission.

Is Solar PV Right for You?

You will make significant savings with solar-powered electricity depending on the system and your circumstances. If you are at home during the day and use your appliances then, you will get the most out of your investment, but if you only use appliances once the sun has gone down, then you will need to draw from the national grid or from solar energy batteries.

Solar Panels
Solar Panels

Most households will use about 15-25% of the energy you generate, though this can change quite dramatically based on:

  • Whether you work from home.
  • How many people are at home during the day.
  • Whether you have an electric vehicle.
  • Whether you heat your home or hot water using a heat pump or other electrical heating.
  • Whether your cooking is done using electricity.


Solar energy can save you money in two areas:

  • It decreases the amount of energy you  buy from the grid, lowering your energy bill.
  • Earn money back through payments from the Smart Export Guarantee.

The average cost of solar panel installation is between £5,000 and £10,000, and about £350 per panel with prices based on the size and occupancy of your house. As every project is individually tailored to the Sales Surveyors.

Mother And Daughter Cooking At The Kitchen

Annual Cost Savings...

Prices are illustrative annual cost savings from a solar PV system for a typical installation, but subject to individual conditions. Our Sales Surveyor will be able to provide a more accurate cost projection from a site visit. Prices based on £0.34 per unit at January 2023

Location, location, location...

Celtic Green Energy Solar Pv Ground Mount
Celtic Green Energy Solar PV
Celtic Green Energy Solar PV House

When installing a Solar PV system, in order to optimise maximum performance, you will need to consider the location of the panels, the suitability of the environment and any potential constraints:

  • Space is a key consideration. The average Solar PV system size is around 3.5kWp and will typically take up around 20m² roof area.
  • For maximum electrical output, it is ideal to have an unshaded, south facing roof. East or west facing roofs can be considered, however north facing roofs are not recommended. A system facing east or west will yield around 15-20% less energy than one facing directly south.
  • Try to avoid any shading from nearby buildings, trees or chimneys as these may have a negative effect on the performance of the system. If shading is unavoidable, some solar PV systems can minimise the impact of shading using ‘Optimisers’ which increase monitoring although– they don’t generate more energy. 
  • Solar PV systems need little maintenance. Keep an eye on nearby trees to ensure they don’t begin to overshadow your system.
  • In the UK, panels that are tilted at 15 degrees or more benefit from being cleaned by rainfall, which helps to ensure optimal performance. Debris is more likely to build up if you have ground-mounted panels, or if you live in an area with more dust in the air. In these cases, you might need to have the panels cleaned occasionally.
Celtic Green Energy Panels Inverter

Long Term Quality

Celtic Green only use the finest quality products to ensure long term low maintenance for our customers. With the option of various products, colours, specifications and capacities tailored to the individual, our panels should last 25 years or more, whilst the Digital Inverter is more likely to need replacing sometime during this period, at a cost of around £800 (depending on system size and the manufacturer). Some inverters have online monitoring functions and can warn you by email if the system fails.

Most of our Digital Inverters have warranties of five years as a minimum, which can often be extended up to 15 years. Speak to us about the likely lifespan and benefit of an extended warranty. You might find that a 15-year warranty costs almost as much as a replacement inverter, so consider it carefully.

Once fitted, we will leave written details of any maintenance checks that you should carry out to ensure everything is working properly. This should include details of the main inverter fault signals and key troubleshooting guidance. We will demonstrate this to you once the system has been installed. Keeping a close eye on your system and the amount of electricity it’s generating (alongside the weather conditions) will help you understand what to expect and alert you to when something might be wrong.

Ask us for exact maintenance requirements before you commit to installing a solar PV system.

Making the Most of Renewable Energy

Celtic Green Energy : Eco Heating

Heat your Home

You can provide free energy to power an Air Source Heat pump to provide cosy low-cost eco-friendly heating

Heat your Water

With a PV Diverter, you can provide free energy to power an immersion heater for hot water

Celtic Green Energy : Stored Solar energy

Store Energy

You can store any energy generated during the day and then retrieve later after dark to power your electrical equipment 

Celtic Green Energy : National Grid power

Sell Energy

You can feed any surplus energy generated back into the national grid and earn a fee for each unit produced.

Celtic Green Energy Battery Storage

The Option of Storing your Power...

When designing any solar power system, it is important to ensure you have enough solar power for your needs. You will need to consider how much solar power you will require during the day as you will not be able generate solar energy after dark. Understanding these parameters will help you decide if you would need to store energy for later use. 

Solar batteries are the perfect solution as they play an essential role in solar self-sufficiency, storing energy when the solar panels can’t. Solar batteries are designed to extend the use of your renewable system as an additional energy source, storing solar energy during the day when there is more sun and then retrieve that power at night when it is required. 

Solar batteries also offer you continuity of supply, allowing you to draw on stored power in times of high demand, while your PV panels continue producing clean electricity even if the grid goes offline due to extreme weather events or other outage problems.

Celtic Green Energy Solar Diverter

The Option of Hot Water on Tap...

Instead of sending surplus electricity to the grid, an optional PV diverter switch can power the immersion heater in your hot water tank, storing hot water for you to use later. 

On its own, excess solar energy is unlikely to meet all your hot water needs, but it can help reduce your bills. PV diverters are a low-cost and low maintenance option for increasing your own consumption of solar electricity (ie using the electricity generated by your own solar PV panels). If your home has a hot water cylinder tank, this is likely to include an immersion heater- even if gas is the primary energy source.  The immersion is usually powered from a fused switch which will become the supply to a Solar PV Diverter or we can fit the required local isolator.  The Solar PV Diverter is then used to control the immersion both automatically from the excess PV energy and manually when you need additional hot water. The system operates by responding rapidly to the levels of import and export at the property according to the variable parameters of changing weather, energy consumption and generation.  These are constantly changing and the electronic controller is able to process the information to ensure that only excess power is delivered for water heating when operating in standard automatic operation.

If you are interested in the addition of a Solar PV Diverter to your Solar installation, speak to our customer services team for more information.

Frequently Asked Questions

Domestic & commercial solar panels may have initial expensive cost but they are a long-term investment, with the benefits increasing year after year. In fact, solar panels are now 70% cheaper than previous years.

Solar panels provide many benefits to commercial properties such as:

  • Showcasing your business as ethical, sustainable and environmentally friendly
  • Reducing costs in the long term
  • Have your own sustainable energy, not relying on the national grid

For domestic properties, solar panel installation can be as little as a day, however installation may take longer for a commercial property or a larger domestic home needing more panels. Call Celtic Green Energy today and we give you more information and a quotation.

The Route to Renewable Energy Starts Here:

Celtic Green Energy : Sales and Customer service enquiry

Request a Survey

If you would like to discuss your energy requirements, drop us a line or give us a call and we will arrange for an onsite appointment with our Commercial Sales Director.

Celtic Green Energy : Report

Agree the Proposal

We will discuss and agree your requirements then prepare a detailed cost illustration outlining the most effective energy solutions and expected outcome.

Celtic Green Energy : Project Management

Project Management

On agreement of the proposal, we will plan and manage the  project including all necessary  paperwork, Building Control and District Network Operator (DNO) requirements for you.

Celtic Green Energy : Installation

System Installation

Our team will plan and arrange for our engineers to install your new system and provide you with an update on progress including regular customer service updates.

Celtic Green Energy : Solar Power

System Commissioning

When the installation is completed, you will receive a comprehensive handover pack including all compliance and warranty certificates and operating instructions.

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