Sunamp Heat Batteries
View the latest range of Sunamp Heat Batteries at competitive wholesale prices from the UK’s best renewables distributor.
Sunamp’s Thermino Heat Batteries are designed to efficiently store heat for domestic hot water systems. Their super-compact Heat Battery technology offers a uniquely clean, safe, compact and very low maintenance thermal energy storage solution.

Using the non-toxic phase change material (PCM), sodium acetate trihydride, they can be charged with a variety of energy sources:
- electricity from the grid (e.g. at off-peak rates)
- air source heat pumps,
- solar PV systems
- ground source heat pumps
With a lifespan of up to 50 years, and very little maintenance required, they are proving popular with housing associations too: They massively reduce the risk of Legionella and the cleaning requirements of typical hot water systems, on top of the space-saving for occupants.
The Thermino batteries are available in different models for different heat sources. The numbers in the product names represent equivalent hot water cylinder size.
For domestic hot water we recommend the Thermino 150 (6kWh) battery for 1-2 bed properties; Thermino 210 (9kWh) battery for 3 bed properties; Thermino 300 (12kWh) battery for 4 bed properties.
For compatibility with different heat pump models please contact us for advice - not all heat pumps are compatible with Sunamps and selection of the appropriate Sunamp for a particular heat pump may not be obvious.
To convert from old UniQ model names to new Thermino product names use this sheet.
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Thermino e
VIEWSunamp Thermino 70 e
£1,800.17
Sunamp heat battery for charging from off-peak grid electricity. Perfect for apartments or off-grid applications. -
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Thermino i
VIEWSunamp Thermino 70 i
£1000
Sunamp heat battery for charging from a boiler or some heat pumps with immersion from the grid as backup. Perfect for apartments or off-grid applications. -
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Samsung
VIEWSunamp Thermino 150 hp-SG
£2,416.70
Sunamp heat battery for charging from a boiler or a Samsung low temperature heat pump with immersion from the grid as backup. Perfect for a 1-2 bedroom property. -
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Daikin
VIEWSunamp Thermino 150 hp-DN
£2,416.70
Sunamp heat battery for charging from a boiler or a Daikin low temperature heat pump with immersion from the grid as backup. Perfect for a 1-2 bedroom property. -
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Vaillant i
VIEWSunamp Thermino 150 hp-VT
£2,416.70
Sunamp heat battery for charging from a boiler or a Vaillant Arotherm heat pump with immersion from the grid as backup. Perfect for a 1-2 bedroom property. -
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Thermino iPV
VIEWSunamp Thermino 150 iPV
£2,423.82
Sunamp heat battery for charging from a boiler or some heat pumps and PV electricity. Perfect for a 1-2 bedroom property. -
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ePV
VIEWSunamp Thermino 70 ePV
£1,870.37
Sunamp heat battery for charging from mains and PV electricity. Perfect for apartments or off-grid applications. -
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Vaillant PV
VIEWSunamp Thermino 150 hpPV-VT
£2,486.90
Sunamp heat battery for charging from a boiler or Vaillant Arotherm heat pump and PV electricity. Perfect for a 1-2 bedroom property. -
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Accessories
VIEWInlet group valve
£57.20
Combined pressure Reducing Valve (PRV) set to 3 bar and a Safety Relief Valve (SRV) factory set to 6 bar with integral strainer. WRAS approved. 22mm compression connections.