The SR5K-UL is a rack-mount battery module for residential and light commercial use. It uses high-quality lithium iron phosphate (LFP) battery cells with an advanced battery management system (BMS) to provide safe and reliable energy storage for solar self-consumption, time-based control, and backup. The SR5K-UL is UL1973, UL9540A, and UN38.3 certified and comes with a 10 year warranty which can be extended to up to 15 years.