Low-voltage batteries are easier to understand, easier to ship in small orders and common in residential projects. High-voltage batteries are better suited to larger inverter platforms and commercial storage packages.
The choice should follow the inverter family first. A battery cannot be selected independently and then forced onto a random inverter.
Low voltage is simple and flexible
Wall, rack and stacked low-voltage batteries are common for homes and small commercial backup. They are easier to expand in parallel and often easier for installers who already work with 48V systems.
High voltage is about system architecture
High-voltage battery stacks reduce current for the same power, which can make sense in larger systems. The tradeoff is that matching the inverter and approved battery stack becomes stricter.