1979年11月，田纳西河谷管理局（TVA）开始评估太阳能生活热水（SDHW）系统。选定的系统将被纳入纳什维尔和田纳西州中部SDHW系统的低息贷款计划。制造商提出了89个系统。通过对提案的分析，选择了32个系统进行热性能测试；根据TVA和NASA-马歇尔航天飞行中心（MSFC）编写的任务文件，这些设备在五个不同的实验室进行了测试。该文件是原始ASHRAE 95P测试标准的修订版，后来进行了修改，以纳入TVA测试文件的许多特征。修订后的ASHRAE标准和TVA测试文件主要不同于TVA负载管理要求、能量输入硬件配置和数据解释。 通过测试和工程评估，我们最初选择了11个系统用于纳什维尔和田纳西州中部的安装项目；但是，评估过程仍在继续，并增加了新的系统。引文:俄亥俄州辛辛那提ASHRAE学报第87卷第2部分研讨会

In November 1979, the Tennessee Valley Authority,(TVA) began the evaluation of solar domestic hot water (SDHW) systems. Selected systems were to be included in a low interest loan program for SDHW systems in Nashville and Middle Tennessee. Eighty-nine systems were proposed by manufacturers. Analyses of the proposals resulted in 32 systems being selected for thermal performance testing;these were tested at five different laboratories according to a task document written by TVA and NASA - Marshall Space Flight Center (MSFC). The document was a revision of the original ASHRAE 95P Test Standard which was later changed to incorporate many of the features of the TVA test document. The revised ASHRAE standard and the TVA test document differed chiefly in a TVA load management requirement, in the energy input hardware configuration, and in the interpretation of the data. The testing and engineering evaluation resulted in 11 systems originally being selected for our Nashville and Middle Tennessee installation program;but, the evaluation process continued and new systems were added.