Many RV owners are unaware of the fact that good deep-cycle RV batteries can (and really should) last for a minimum of six years. If they are properly maintained, they can last even longer. Ensuring that your RV batteries last for years to come is easier than you might think. Here are a few ways to make sure you are getting the most juice of your RV batteries.

It is worth remembering that batteries carry a charge, so be cautious and safe when working around batteries and your RV electrical system. 

Recycle

One of the things to remember about batteries is that they have recyclable components. If you are replacing the batteries on your RV, you can recycle your old batteries. Interestingly enough, less than 5% of all battery lead is not recyclable. 

Water

When it comes to watering your battery (yes, you heard that right), make sure that you only water your batteries after charging. You can technically do this prior to charging, but the plates need to be exposed prior to charging. If your plates are exposed, add just enough water so that the plates are covered, then charge your battery. Once your battery is fully charged, you can fill up each individual cell right to the bottom of the vent well. 

It is worth noting, too, that when you add water to your batteries, it should be water that is free of minerals. Depending on the mineral makeup of your home’s tap water, there may be harmful minerals that could lead to issues in your batteries such as calcium sulfation. 

Avoid Overcharging

Overcharging your batteries can actually damage them. Hot temperatures do the same. It is best to charge your batteries in a cool environment, and monitor the charge so as to not overcharge them. 

RV Switch

When your batteries are installed on your RV, chances are they are still powering various items such as carbon detectors, some detectors, radio, circuit boards, and antennas. If you are not using your RV at all, you can disengage your battery connection by turning your battery disconnect switch to the “off” position. This will save a surprising amount of battery life. The last thing you want is two dead RV batteries when it is time to power on your RV refrigerator before a trip! 

Discharge

The lower you drain your batteries each time you use them, the shorter the life span of that battery will be. For example, if your depth of discharge is 75% each day, that battery will last more than twice as long as a battery that is discharged to 25% each day. 

Recharge Often

Sulfation is the lead cause of dead batteries (in lead-acid batteries). When this type of battery is in a low charge state, small crystals begin forming on the plates - called sulfation. Over time, if left unchecked and without a recharge, your battery will quickly become ruined. Ensuring that your batteries are regularly recharged will prevent this from happening. Sulfation starts when your battery charge starts wiping below 80% charge (or 12.4 volts). Recharge often and your batteries will thank you. 

Whether you are an avid RV Park visitor or you prefer boondocking, dealing with a dead battery or two while on the road can be a headache. And it is not until those batteries go out that you begin to realize how integral they are to the functionality of your RV. Keep your batteries in good health and they will last for years to come!