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Solar Thermal

Does your business have to endure large hot water bills? Could you do with paying less? Did you know that solar thermal heating panels qualify for the Government’s Renewable Incentive Scheme (RHI)? That’s currently 20 years of income on this technology.

Just a few reasons why you should consider solar thermal heating and whilst it’s true that the more roof or ground space you have, the better, even a small array can make a difference.

From day one, you’ll drive your water heating costs down significantly, and the spin-off bonus is that you’ll slash your Carbon emissions at the same time by consuming less grid electricity.

IU Energy will –

  • Assess your site suitability for solar thermal heating panels
  • Accurately calculate your savings
  • Accurately calculate your ROI
  • Provide a fixed cost quote for installation
  • Design your array 
  • Install it
  • Maintain it

For a fast response, just fill out the form below, or call one of our company solar thermal heating experts now on –

01752 26 26 26

Renewable Heat Incentive for 20 years

Significantly, another key point is that solar thermal panels qualify for the Government’s Renewable Heat Incentive (RHI) scheme. This is currently for 20 years. In other words, for the duration, you’re paid RHI income. This can be significant.

That’s of course in addition to reduced fuel bills and reduced Climate Change Levy (CCL).

Further information

You can download a Solar Thermal Heating Technology Information Sheet here

Below are case studies for projects we have conducted in Solar Thermal energy, followed by FAQs.


It depends on whether your business uses lots of electricity, or lots of hot water. 

This technology is specifically used to heat water using energy collected from the sun. It is therefore ideal for sustainable water heating.

For this reason, it is completely different from Solar PV, which generates electricity. Furthermore, even a small solar hot water system will save you a significant amount on water heating.

Certainly, this is especially true if you have a large amount of roof space or land to use for an array.

On the contrary, a solar thermal collector just needs light to work. Certainly, bright sunlight is obviously ideal, but they still heat water even on cloudy days.

Nevertheless, a backup boiler or immersion heater is necessary. To explain, this is to supply an extra boost to your hot water generation during winter when a solar water heater will contribute less heat.

Usually, a solar water heating system will meet up to 100% of your hot water needs during summer. For this reason, the backup heating system stays unused in this period. In fact, over a year, Solar Thermal will meet in the region of 50% to 60% of your needs.

Nowadays maximum hot water temperatures are achievable from a solar heating system even at low outdoor temperatures.  This is chiefly due to the low levels of heat loss from highly efficient vacuum tubes.

IU Energy has extensive experience with commercial Solar Thermal panels, but you don’t have to take our word for it and we have numerous case studies. As an illustration, we recently completed a 77kW, ground-mount solar thermal system. 

Yes, and it is applicable for twenty years, so you’ll get twenty years of passive income.

In spring/autumn time evacuated tubes tend to provide a higher energy yield than flat plate systems, however in the summer a correctly sized flat plate system will provide up to 100% of your hot water demand.

Evacuated tubes generally require slightly less roof space to yield the same amount of energy.

Flat plate systems have the benefit of being able to be fully integrated into the roof line, which has a better appearance and also saves money on other roofing materials. Flat plate systems also benefit from lower initial costs and lower maintenance requirements.

Solar thermal systems only require daylight to operate; this means they will still heat water on cloudy days. Whilst most solar energy is generated in the summer months, a solar thermal system will still contribute towards hot water requirements in Spring, Autumn and Winter, providing up to 60% of the annual hot water requirements of a business.

For optimum performance, a South facing roof is ideal for a solar thermal system. However anything between South East and South West also performs well and could generate heat for up to 60% of your annual hot water requirements.

Generally, no. Solar thermal installations fall under permitted development. However, if your property is a listed building or in a conservation area you may need planning permission.

Solar thermal systems can provide for up to 60% of the annual hot water requirements for a building. As we need heat in the winter when solar radiation is at a minimum, solar thermal systems are not suitable to provide a property’s heating requirements alone, however they are ideal when integrated as a pre-heat system for an air source heat pump or ground source heat pump system, which will provide for all the heating and hot water requirements of the property.

Six years on average, although we have many clients who achieved 4.

We’ve been around for eighteen years and are one of the oldest UK energy companies still in business. However, you also have the benefit of Tier 1 manufacturers’ warranties and insurance backed warranties.

How much energy is your business currently wasting?

IU Energy is a multi-award-winning business, providing comprehensive energy management services to its B2B clients, including energy reduction solutions, renewables and independent energy procurement.


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