Low loss sensible heat storage

Sensible A sensible heat storage apparatus comprising

• an inner vessel comprising an internal volume adapted to comprise a fluid;
• an outer container enclosing said inner vessel;
• a thermal insulation layer between said inner vessel and said outer container;
• at least a first integrated connection and a second integrated connection to connect the internal volume of said inner vessel to an outer environment through the thermal insulation layer;
• wherein said integrated connections are adapted to each integrate and accommodate at least two individual sub-connections such that every integrated connection forms a single thermal bridge between the inner vessel and outer container and wherein all thermal bridges are located in the bottom 75% of the total height of said outer container;
• wherein said first integrated connection is adapted to integrate and accommodate a liquid port and at least one further sub-connection;
• and
• wherein said second integrated connection is adapted to integrate and accommodate a liquid port and at least one further sub-connection.