本欧洲标准规定了适用于EN 12977-1规定的小型定制系统的商店的性能表征的测试方法。 根据本文件测试的商店通常用于太阳能热水系统。然而，使用水作为存储介质的所有其他热存储器的热性能也可以根据本文件中规定的测试方法进行评估。 该文件适用于标称体积在50升至3000升之间的商店。 本文件不适用于combistores。 EN 12977-4规定了太阳能组合的性能测试方法

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. Stores tested according to this document are commonly used in solar hot water systems. However, the thermal performance of all other thermal stores with water as a storage medium can also be assessed according to the test methods specified in this document. The document applies to stores with a nominal volume between 50 l and 3 000 l. This document does not apply to combistores. Performance test methods for solar combistores are specified in EN 12977-4.