"电池组电压" can be translated into English as "battery pack voltage" or "battery bank voltage".
"Battery pack" typically refers to a set of interconnected batteries designed to work together as a single unit, often used in electric vehicles, portable electronics, etc.
"Battery bank" is another term used to describe a group of batteries connected in series, parallel, or a combination of both to provide a desired voltage or capacity, commonly found in renewable energy systems like solar power installations.
Both terms are correct and commonly used, depending on the specific context and industry.