Sunamp Heat Batteries
View the latest range of Sunamp Heat Batteries at competitive wholesale prices from the UK’s best renewables distributor.
Sunamp’s UniQ Heat Batteries are designed to efficiently store heat for domestic hot water systems or space heating. 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, 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 completely negate the risk of Legionella and the cleaning requirements of typical hot water systems, on top of the space-saving for occupants.
The UniQ batteries are available in 7 different models with 3kWh, 6kWh, 9kWh and 12kWh capacities. For domestic hot water we recommend the 6kWh battery for 1-2 bed properties; 9kWh battery for 3 bed properties; 12kWh battery for 4 bed properties.
For space heating, you may need to use several heat batteries in parallel and recommend contacting us for advice for configuring such systems.
Looking for a complete heat pump kit? Shop our range of Samsung heat pumps at excellent prices.
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Daikin
VIEWSunamp UniQ HW 3 +iLTHP Daikin
£1,922.02
Sunamp heat battery for charging from a boiler or a Daikin low temperature heat pump with immersion from the grid as backup. Perfect for apartments or off-grid applications. -
Vaillant
VIEWSunamp UniQ HW 3 +i-VT
£1,922.02
Sunamp heat battery for charging from a boiler or a Vaillant Arotherm heat pump with immersion from the grid as backup. Perfect for apartments or off-grid applications. -
Samsung
VIEWSunamp UniQ HW 3 +iLTHP Samsung
£1,922.02
Sunamp heat battery for charging from a boiler or a Samsung low temperature heat pump with immersion from the grid as backup. Perfect for apartments or off-grid applications. -
Vaillant +iPV
VIEWSunamp UniQ HW 3 +iPV-VT
£1,992.22
Sunamp heat battery for charging from a boiler or Vaillant Arotherm heat pump and PV electricity. Perfect for apartments or off-grid applications. -
HW
VIEWSunamp UniQ HW 3
£1,752.70
Sunamp heat battery for charging from a boiler or high temperature heat pump (HTHP). Perfect for apartments or off-grid applications. -
eHW
VIEWSunamp UniQ eHW 3
£1,800.17
Sunamp heat battery for charging from off-peak grid electricity. Perfect for apartments or off-grid applications. -
HW+iPV
VIEWSunamp UniQ HW 3 +iPV
£1,941.20
Sunamp heat battery for charging from a boiler or heat pump and PV electricity. Perfect for apartments or off-grid applications. -
HW+i
VIEWSunamp UniQ HW 3 +i
£1871
Sunamp heat battery for charging from a boiler or heat pump with immersion from the grid as backup. Perfect for apartments or off-grid applications. -
eHW+iPV
VIEWSunamp UniQ eHW 3 +iPV
£1,870.37
Sunamp heat battery for charging from mains and PV electricity. Perfect for apartments or off-grid applications. -
Accessories
VIEWThermostatic mixing valve
£109.20
Sunamp units deliver water at 58 degrees (the temperature at which the phase change material melts). A TMV is usually required to bring the temperature down to supply showers, baths and hot water taps.