Thermodynamic Panels :: Happy Irish Customers

The Irish firm LVP Renewables have been installing Thermodynamic Panel systems in Ireland for a while. Their site has a big list of happy Thermodynamic Panel customer testimonials including:

We are a family of six-two adults and four children ranging in age from 13 to 21 years …. Having now had the system in for 10 months we are delighted with it and there have been no problems to date. We are never in need of hot water as we have had a constant flow since the systems installation in October 2011

Their FAQ page has a few interesting items:

Does this system need a back-up heating system during the winter?

No, this is the only solar panel heating system that will provide you with 100% of your hot water. Also our cylinders come with a mini-emersion inside that can be turned on manually if needed. However if you would like to incorporate a back-up heating system there is a provision for a secondary heating coil in most of the systems we provide (call for specific information on tanks). If you decided that you wanted the secondary coil in the tank then we would advise you to put a manual leaver on the system and only use it if necessary.

What is the difference between an Energie Solar Panel System and Solar Tubes or Plates?

Unlike traditional solar panels (tubes and flat plates) the Energie system offers:

  • No unnecessary annual maintenance checks. In order to maintain the maximum efficiency of tubes and plates they must be serviced annually.
  • LVP panels are lightweight (weighing only 8kg) and roof structures do not need to be reinforced. Conventional solar panels are heavy-weighing anything from 40-300kg
  • Energie Solar Panels absorb heat from both sides unlike traditional panels which only capture radiation on one side
  • One Energie panel (80cmx200cm) will provide a family of up to 6 people with all of their hot water needs. With traditional solar a large amount of panels is needed to provide similar quantities of water
  • Energie panels need no back up from oil or gas. Other solar panels need an auxiliary energy source when the sun isn’t shining or when in high demand
Is the system provided with any device to treat bacteria such as Legionella?

Yes. In accordance with current legislation, it is provided with a circuit to rise the temperature up to 70 Degrees, which is manually activated and automatically disconnected

What happens if we install 2 panels on the roof?

The heating time will be reduced by half

Thermodynamic Panel Case Study :: Cork (Ireland) water and space heating

Their site also has case studies including one for a central heating and domestic hot water system in Cork (so SE Ireland).

Most are about water heating only (no heating) with positive comments.

The Cork water and space heating was for:

  • 235 sq m 2 storey stone cottage with a large extension that has:
    – 4 bedrooms, 3 bathroom (1 en suite), 1 kitchen, 2 sitting rooms, 1 large hallway, 1 utility.
    The Silver Spray property is 281 sq m (4 bedrooms ….
  • Radiators (not under floor heating)
    – average water temp to the radiator circuit 45 degrees C input, 35 degrees average return temp.
    – the radiators give the property a 1000 litre water buffer !
  • 300 litre water tank.
  • I can’t work out what the figures mean !


Thermodynamic panel :: A happy user

One of the long GreenBuildingForum threads on Thermodynamic Panels has had some comments from somebody that installed one on their property in Northern Ireland, 18 months ago:

  • “I have had a thermodynamic panel installed for 18 months now and so far I can’t find fault with it.”
  • “It provides all the hot water requirements that is asked if it.”
  • “I have never switched on the built in immersion even when it has been -10 degrees outside and the panel has had an inch of ice on it.”
  • “I couldn’t justify solar as lets face it who wants something that only works well 7-8 months out of 12 then you need an additional piece of kit as back up, or pay £3000 per bole hole for a ground source heat pump when you don’t have enough land for slinkies or have their own personnel forest to supply a log boiler.”

Installed System

  • £4,100
  • Panel
  • 280 litre cylinder
  • pump and fittings
  • County Down, Northern Ireland
  • “Currently there are 4 showers every morning, plumbed to dishwasher and washing machine, and and usual washing in the sink when items don’t fit in the dishwasher.”

Beware of Thermodynamic Panels ?

I’ve been sent a scan of a one page article in the Clean Slate publication by the Centre for Alternative Technology (CAT, that has the title:

Think Twice about thermodynamic panels

Compared to an air source heat pump, a Thermodynamic panels is a heat pump connected to a flat panel instead of the heat exchange unit.

The article is concerned that:

  • Panel collectors might work well in some conditions, but badly in others.
  • That air flow can be poor around them,
  • That they can ice up.
  • That there are no studies on year round performance to back up marketing claims.*
  • They don’t qualify for the Microgeneration Certifciation Scheme (MCS). So, pending any updated clarification as what they are (heat pump?) they won’t qualify for the Renewable Heat Incentive (RHI).

* I’ll have to check, but a few companies and Internet sources do seem to have put their year round data on-line. OK these aren’t independent studies, but there is data about.

If the panel is running at low efficiency, then you have a low or zero coefficient of performance or COP. The article points out that consequent running costs at such times could be more expensive than gas (or even oil).

The report quotes an “Energie” thermodynamic system consuming 4.1 kWh of electricity to heat 250 litres of water from 10°C to 55°C with 15°C ambient temp. The 2.7 COP is “no better, financially or environmentally, than a modern gas boiler).

They say a conventional solar water heating system would use less energy and so cost less. The report references the Energy Saving Trust field trial ( I Google found the link).

The reports concern is that:

  • In winter a boiler would be more cost effective.
  • In summer a conventional solar water heating system will be better.

A conventional solar hot water heating system uses almost no fuel.

The CAT advice sheet on conventional solar water heating systems is here.

Confused Conclusion for Silver Spray Water Heating

The end solution for Silver Spray isn’t clear.

  • No mains gas.
  • Next to the sea (so an air source unit will fail and need major component repairs and replacement within 5 years.)
  • Cliff top and narrow plot, plus slope etc means ground source by buried pipes or vertical drilled holes both seem unrealistic.


  • There are going to to solar elec PV panels.
  • The house is going to be highly insulated and sealed, so there will be a low space heating requirement.

So if Thermodynamic panels can have a good chunk of their winter electricity from the PV panels, they could still be the best solution.

Thermodynamic Hot Water – Comparing Running Costs

A great article on Energie Solar Thermodynamic Hot Water – Comparing Running Costs.

Also look at this post about how they see the systems working, being installed etc.

Looking at the The Energie ECO 200is:

on a really good day (sunny and warm) it will supply at most 4.55 kW of energy and will consume 595W. On a bad day (cold night) it will supply 2.8 kW and consume 890 W – so the coefficient of performance would vary from 3.14 to 7.64 – so for every unit (kWh) of electricity you consume you would return between 3.14 and  7.64 kWh of heat for hot water.

As of February 2012 average gas prices were 4.1p per kWh and electricity averaged 13.7p per kWh. Gas (and oil) boilers have a small level of inefficiency (at best they are 90% efficient over the year)  and thus the cost per kWh of “heat to the water” would be 4.56p. With the Energie system the cost would average at 2.54p (13.7p divided by 5.39).

Annual running cost per kWh:
–  Energie 200is, £0.28
– Gas boiler, £0.51
– Oil boiler, £0.77

Thermodynamic Panels from Jewsons?

I first saw the Thermodynamic panels on the Jewson stand at Eco Expo in London in early 2012.  They now have more info on them, on their Website:

Jewson is the only national builders’ merchant with exclusive rights to the new and innovative Thermodynamic Atmospheric Energy Panels, which can generate 100% of hot water and heating requirements all year round.

In terms of getting them installed:

Trade professionals should be aware that to be able to install the panels, they will need to be F-Gas registered and to have attended an official installation course. Both of these courses will shortly be offered at our Greenworks Training Academy.

The Jewsons blog implies they will be eligible for the RHI (Renewable Heat Incentive).

  • See the comments at the bottom of
    “You can find further information at Also, although independent test data is available from Europe and has Solar key mark so is eligible for Renewable heat incentive in the UK, the product is currently gaining independent testing through the BRE in the UK and the data will be available shortly.” 21-09-2012

BUT (10 Nov 2012) update to this post


  1. I called into my local Jewsons this morning to ask about the panels and what information they had.the guy on the front desk was a waste of time, did’nt know they did solar panels of any description, so I explained what it was I wanted and the guy in the office chipped to say they had been discontinued. Suggested they neededto update the web site and was told where to get off!!! Great customer service!

Thermodynamic Panel Installation Cost

This thread on how much should they cost:

I have had two quotes ranging from 6k-9k and I am not sure how much these are and how to compare the two?

I’ve asked a couple of people in the trade what they should cost, and have been told c. £5,500 for one panel and a 250l cylinder

certainly don’t pay over £5k for a single panel and 250l tank fully installed.

TBH I don’t really see why it should need to cost more than around £3.5-4k if you deal with an installation company instead of a sales company, …… with the commission structure.

One thing though is I think there’s probably a temporary shortage of people with FGas certificates along with the other qualifications, for installing this in line with the regulations, which is probably keeping some competition out of the market. If you need a hot water solution now then fair enough, if not then it’s probably better to wait a few months for the dust to settle.

Thermodynamic Hot Water Payback Period and Running Costs Compared to Fossil Fuels

A fantastic article comparing the cost of a Thermodaynamic panel heat exchange system with fossil fuel systems to heat water.

For the Silver Spray  site, we do not have mains gas, so the Vs oil option.

It’s key to note, that at the moment, it is not expected that Thermodynamic panels will qualify for the RHI (Renewable Heat Incentive Payment). Indeed Pete at dropped me an email to say that “that the system is suspended from the MCS scheme as of the 18th November.”

Thermodynamic panels WILL or WON’T get the RHI?

Looking at multiple posts on the, discussion, Thermodynamic panels don’t look likely to be a part of the Renewable Heat Incentive payments that are due to start in 2013.


The 21-09-2012 reply from Jewsons (” the only national builders’ merchant with exclusive rights to the new and innovative Thermodynamic Atmospheric Energy Panels”) to this blog post of theirs,

You can find further information at Also, although independent test data is available from Europe and has Solar key mark so is eligible for Renewable heat incentive in the UK, the product is currently gaining independent testing through the BRE in the UK and the data will be available shortly.

suggests they believe Thermodynamic Panels will get the RHI



  1. DECC held a RHI webchat yesterday and, as part of that, confirmed that thermodynamic panels will not be eligible for RHI until they are MCS accredited.

A users feedback on Thermodynamic Panels


We have been in our house for almost a year now, tried to build to passishaus standards and despite plumber, electrician and MVHR installation problems (see previous discussions if clarification needed), the thermodynamic panel is one piece of kit that i cannot fault. There is a backup immersion fitted and has never been switched on and we have had 60 degree hot water every day without fail. I have seen the panel completely white with frost and still no bother with hot water. I am in no shape or form connected to any company that sells or installs the panels, but I have no problem recommending the technology.