Rooftop Systems

We focus on large solar PV installations for commercial buildings, such as barn roofs

Recognised experts in the installation of solar PV on commercial roofs

We delivered the first commercial scale solar PV (photovoltaic) installation on a barn roof under the Feed-In Tariffs scheme (source: NFU). As such, we know the challenges arising from barn-roof installations and have the skills and contractors required to deliver a robust system efficiently whatever the size.

A few key facts

Most of the projects we are working on are a minimum of 10kW in size and typically considerably larger. To give you an idea of the size of barn roof required and the costs involved:

  • 10kW is roughly 50 panels
  • Needing about 85 square meters of roof space
  • Costing about £27,500 (NB there are economies of scale for larger systems)

Depending on the location and the extent to which the energy can be used on site, projects can typically achieve an internal rate of return of over 10% per annum. The returns are best where there is a large energy use on site, though many pure grid-feed projects are also viable.

Find out more about solar photovoltaics

Our roof-mounted solar PV service

Ownergy's service is designed to make the installation of solar PV on your barn roof as simply and efficient as possible. For example, our first project was completed in less than three months from our customer giving us the go ahead despite the fact that it involved over 150 panels being installed on a sensitive structure. We are able to do this because our team consists of both experienced building engineers (especially when it comes to roofs) and some of the country's leading solar PV experts. From assessing your barn(s) and discussing the best approach with you, through to designing, attaining planning approval, installing, managing and maintaining the system, our service ensures the right sort of system is installed to meet your requirements providing the best possible returns under the Feed-In Tariffs scheme.

Please note, as part of a project we are able to install other tariff-eligible systems (solar thermal, wind turbines, anaerobic digestion, hydro, heat pumps and biomass).

Read a full description of our Roof Mounted Solar PV Service

Roof mounted PV enquiries

As already stated, our service is primarily designed for farmers. If you wish us to carry out an initial assessment of your barn roof, please complete this short form.

Submit details about your barn roof

If your enquiry concerns another type of commercial building, please feel free to e-mail us to see if we are able to help.

Why farmers should invest in solar PV

For farmers and landowners the renewable energy tariffs represent an attractive investment opportunity. This is because there is the physical space to consider a variety of options and locations, ensuring the greatest level of financial return. A farm is much more likely to have a large, unshaded south-facing roof for example.

As a farmer or landowner, you will be accustomed to business diversification and able to strategically plan for long-term investments. This latter point is especially important as the full benefit of the tariffs will take between 15 and 25 years to realise.

Index linked

In addition, the Feed-In Tariffs are index-linked (to the RPI) and the nominal returns, in the presence of inflation, will therefore be higher – i.e. with average inflation at 2%, the nominal IRR should be in the range of 7% to 10%.

Capital allowances

Farmers can use their annual investment allowance for their renewable energy installation which, until April 2012, has a £100,000 upper limit. However, as fixed equipment, the installation will only be eligible for a 10% annual writing down allowance. The use of these capital allowances cannot be used for any element of the installation that relates to a farmer’s private dwelling.

Be advised, Enhanced Capital Allowances do not apply to Solar PV. The only tariff-eligible systems are: solar thermal, CHP, biomass, and air-, ground-, and water-source heat pumps. We are able to install such systems as part of a project and this would therefore enable a business to claim 100% first-year capital allowances on their spending. A business can therefore write off the whole of the capital cost of their investment in these technologies against their taxable profits of the period during which they make the investment.


The scheme is designed to prohibit the use of grants and few are now available for the installation of renewable energy systems.

Powered By WolfeWare