30v 36v 39v 40v 48v 52v 58v 60v 45v to 24v dc-dc converter 20a 30a 480w 720w step down buck power supply module for car 30v 36v 39v 40v 48v 52v 58v 60v 45v to 24v dc-dc converter 20a 30a 480w 720w step down buck power supply module for car. Sale price : $16.65 Category : Home Improvement