Sunamp Heat Batteries

Full nationwide installation service with 10 years warranty

Heat Pumps

Sunamp Heat Batteries

Cascades of hot water from a heat pump.

The space-saving Sunamp Thermino xPlus heat batteries work with low temperature heat pumps to provide hot water for all your needs.

With a signal from the heat pump these heat batteries can be boosted electrically if required with an internal element also acting as a backup so that they never let you down.

Easy to fit, the Sunamp Thermino xPlus heat batteries provide a better alternative to outdated indirect cylinders and thermal stores for compatible heat pumps.

Available in four sizes which can also be combined, they are the right solution to perfectly match the exact hot water requirements of your property.

Full of Benefits

Direct Water Heater Sunamp Heat Batteries

Cost Effective

no mandatory annual maintenance and a 10-year warranty.

Energy Efficient

Instant hot water at mains pressure with extremely low heat losses.

Fail Safe

Uses a backup internal heating element if no Solar PV is available.


Non-toxic and significantly reduced risk of legionella.

Compact Design

Being up to four times smaller than an equivalent hot water cylinder.


Easily combined to increase storage capacity.


Works with Daikin and Samsung LTHPs.


Models Available

Direct Water Heater

Our prices are guaranteed and include removing your old system and fitting your new Sunamp with all the pipe work and extras along with specialist delivery.

Available in a range of sizes which can also be combined, they are the right solution to perfectly match the exact hot water requirements of your property.

  Thermino 150 Thermino 210 Thermino 300 Thermino 150 Thermino 210 Thermino 300
Thermino Thermino 150 xPlus Thermino 210 xPlus Thermino 300 xPlus Thermino 150 xPlus Thermino 210 xPlus Thermino 300 xPlus
Compatible With Samsung Heat Pumps Samsung Heat Pumps Samsung Heat Pumps Daikin Heat Pumps Daikin Heat Pumps Daikin Heat Pumps
Heat Storage Capacity (kWh)1 6.3 9.5 12.6 6.3 9.5 12.6
Equivalent Hot Water Cylinder Size2 128 192 256 128 192 256
V40, Volume of Hot Water Available at 40°C (L) 167 271 333 167 271 333
Standby Heat Loss Rate (kWh/24h | [W]) 0.68[28] 0.77[32] 0.84[35] 0.68[28] 0.77[32] 0.84[35]
Energy Efficiency Rating A+ A+ A+ A+ A+ A+
Heat Power Rating (~230V) 2.8kW 2.8kW 2.8kW 2.8kW 2.8kW 2.8kW
Height (mm) 650 860 1070 650 860 1070
Width x Depth (mm) 365 x 575 365 x 575 365 x 575 365 x 575 365 x 575 365 x 575
Installed Price* £4,395 £4,695 £5,895 £4,395 £4,695 £5,895

* Full installation by Accredited Sunamp Installers:

Our full installation service includes supply and delivery using Zonzini to the point of installation plus a full bore isolation valve, all pipe work removal of old pipework (except under floors) and removal of old unwanted header tanks if possible.

This service also comes with a .5L expansion vessel and 22mm Thermostatic blending valve as required by Sunamp to conform with their installation instructions for a valid warranty. For all PV versions the Sunamp Optimino PV key is required and we recommend the My Energi Eddi solar diverter and Harvi to maximise the use of excess PV.

Please note: If you live in a hard water area a water conditioner such as the Hydroflow HS38 needs to be fitted otherwise the Sunamp warranty will be void. The charge for this is £225 plus VAT.

Choose Your Sunamp

Consumer & Trade Suppliers

Nationwide Service

We supply and fit directly to the consumer or supply to the trade throughout the UK so if you are interested in a Sunamp Heat Battery we can help you.

If you are planning to improve your property, you are a housing developer or a landlord. Thermal energy storage technology can cut carbon emissions using efficient eco-friendly heat batteries.

If you are a developer or in the trade it is now time to start thinking about alternatives to the traditional way we would expect to deliver hot water. Working alongside a renewable energy source heat batteries can deliver environmental benefits, save space and improve cost efficiencies.

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Comments From Our Customers

Eco Smart Heat Testimonials

  • Very pleased with Eco Smart Heat. From the initial enquiry through to planning, delivery, installation and handover the service was excellent.

    Rare these days to find such a great company that offer prices that could not be matched anywhere else.

    Steve Kirby
  • Ecosmartheat have fitted a sunamp heater for me. It was done very efficiently, turned up on time etc. Sorted out little problems on the way (getting it to work so that I can use either my existing oil boiler if I want, or the electric, and sorting a problem with the wiring).

    Also much cheaper and more helpful than a nearer supplier.

    Ruth Blake
  • Very Pleased with the fantastic job done by the guys. They installed our Sunamp heat battery in 2 days including removing old heating system, radiators, tanks etc with minimum disruption and a thoroughly professional attitude.

    Excellent problem solving too working out our antiquated old system. Best thing, all the work was covered by the original quoted price, no hidden extras.

    Thanks very much Eco Smart Heat. Highly recommended.

    Vic W
  • Excellent service from start to finish. Contacted Ben who talked me through the process and organised delivery and installation of Sunamp. Even squeezed me in before Christmas, which was very much appreciated.

    Richard came first thing as promised to install, explaining the process of the fit, making sure I was happy with everything. Very friendly and accommodating guys would definitely recommend their service and product.

  • This is a company with great customer service and competitive pricing which provides a service nationwide. From the initial phone call enquiry to having the unit delivered, immersion heater removed & Thermino 150e installed, the email and phone communication was great.

    The installation was booked within 2 weeks. I have now saved loads of space by putting my washer and dryer into the cupboard where my Thermino is. The company also went above any beyond their normal job role by providing and installing an updated timing switch and the installation of a tee valve to relocate my washer.

    David Tomlinson

Why are we better value?

Eco Smart Heat

We charge a fair price for our products and services so perhaps you should be asking our competitors why they cost more than us?

We do not employ pushy sales executives and we do not spend big on marketing. Why? because our prices, experienced team and products sell themselves.

Compare any of our prices against our competitors and you will find us to be better value with a better service.

We are an independent, family run business with engineers that have over 20 year's experience in the industry. If you would like a free survey and a fair price, contact us today.

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