This European Standard specifies test methods for the performance characterization of stores which are intended for use in small custom built systems as specified in EN 12977‑1:2018.

Stores tested according to this document are commonly used in solar combisystems. However, the thermal performance of all other thermal stores with water as a storage medium (e.g. for heat pump systems) can be also assessed according to the test methods specified in this document.

This document applies to combistores with a nominal volume up to 3 000 l and without integrated burner.