fpr-newenergy
https://www.fpr-newenergy.com/products/fpr-battery-cell-pack-module-48100s/
Multi-application LFP Battery Pack
The FPR 48100S from the 48v lithium ion battery manufacturer, 48v lithium ion battery factory, FPR, is a 3U-height, 19-inch integrated 48 volt lithium ion battery pack.