Water should be inspected depending on the application. Keep in mind that CHARGING your battery is what promotes water evaporation in a standard golf cart battery. So the more you charge the battery, the more often you want to check the water. We recommend to start off checking your battery water levels about once per month in the beginning. Over time, your application will determine water usage. You may determine that water is not needed every 3-4 months….again depending on usage. Therefore you can adjust your maintenance schedule.