Hey thanks for asking! It's a 56V nominal voltage ⚡️. Here is a link to the exact part. www.partswarehouse.com/MTD-Charger-56V-Li-650-MTD-725-17057-p/MTD-725-17057.htm?Click=365719&gad_source=1&gclid=Cj0KCQiA7NO7BhDsARIsADg_hIYcdCM0yARheD-7L3FcZZPJW09SR_S_3JU8AV12iO82OnKDoI_3jD4aAgSOEALw_wcB Remember if you want to charge your nominal voltage 56v battery, you will need a higher voltage than that to force electrons to flow in reverse. Thanks for watching! Stay tuned for more solar videos coming soon.