The need for liquid cooling depends on the specific system, its operating load, and the manufacturer's requirements. Motors, controllers, and other components can require liquid cooling, air-cooling, or passive cooling depending on the make, model, and application. If batteries are being put under strenuous loads from requiring high energy input or output, they will need liquid cooling but if they have minimal loads compared to their rating, they likely will not. To see if your system requires liquid cooling, check the specification sheet for your product on the product’s page.