How Often Do Deep Cycle Batteries Need Water?

How far can I discharge a deep cycle battery?

Automotive batteries will generally fail after 30-150 deep cycles if deep cycled, while they may last for thousands of cycles in normal starting use (2-5% discharge).

Deep cycle batteries are designed to be discharged down as much as 80% time after time and have much thicker plates..

What happens if battery water is low?

The performance of the battery is reduced. You will also get a lot more corrosion of the plates and that causes the battery to off-gas more. … The performance of the battery is reduced. You will also get a lot more corrosion of the plates and that causes the battery to off-gas more.

How often do you add water to batteries?

While a battery should only be filled after it is completely charged, you should check the water level before charging. Before charging, make sure there is just enough water to cover any exposed plates. After charging, add enough water to bring the level to the bottom of the vent, about ¾ below the top of the cell.

How do I check the water level in my deep cycle battery?

Open the vent caps and look inside the fill wells. Check electrolyte level; the minimum level is at the top of the plates. If necessary add just enough water to cover the plates at this time. Put batteries on a complete charge before adding any additional water (refer to the Charging section).

How do I know if my deep cycle battery is bad?

If your battery is reading 0 volts, chances are the battery experienced a short circuit. If the battery cannot reach higher than 10.5 volts when being charged, then the battery has a dead cell. If the battery is fully charged (according to the battery charger) but the voltage is 12.5 or less, the battery is sulfated.

How long will my deep cycle battery last?

six yearsMost deep cycle batteries can last up to six years with proper care and charging (depending on the frequency of use). It’s up to you to make sure that your battery isn’t being damaged by your charging routine.

Can you use tap water in a deep cycle battery?

The electrolyte in a flooded deep cycle battery is a solution of acid and water. Using distilled or deionized water is recommend because it is free from additional minerals you would find in water such as regular tap water. Adding chemicals and minerals can significantly decrease the life of batteries.

What amp should I charge my deep cycle battery?

It is better to charge a deep cycle battery at a higher charge rate like 6-amps, 10-amps or higher.

Can you overcharge a deep cycle battery?

Overcharging Deep Cycle Batteries: As a result of too high a charge voltage excessive current will flow into the battery, after reaching full charge, causing decomposition of water in the electrolyte and premature aging. At high rates of overcharge a battery will progressively heat up.

Can you run a deep cycle battery flat?

Typically, a fully charged deep cycle battery will have a voltage of over 12.8V – 13V. … Faulty cells are difficult and usually impractical to repair, so you’ll need to replace the battery. When a deep cycle battery is fully discharged (dead flat), it should reveal a reading of approximately 10.5V.

What happens if you overfill a battery with water?

The answer is yes and the results are messy and potentially toxic and corrosive. The only time you add water to a lead acid battery is when it is fully charged. The reason for this is when a battery is fully charged the plates are thicker and the there is less space between them.

How do I know if my battery needs water?

If your car battery is not the sealed type (there are removable caps on the top, either raised from the top of the case or inset with a screwdriver groove to the near long edge,) you have a battery that may occasionally need water. Best to pop the caps and take a peek about once a year.

Do deep cycle batteries need water?

DO NOT OVERWATER. For fully charged standard deep-cycle batteries, add water to the level of 1/8 below bottom of vent well (see diagram A below) … If the batteries are discharged, only add water if the plates are exposed. Add just enough water to cover the plates, then charge the batteries.

What is the best way to charge a deep cycle battery?

There are two main approaches to charging up a deep cycle battery. The first is to charge the battery while it’s on the boat already, in the fixed position. The second is to take the battery out of the boat and make use of a portable charging unit to top the battery up to full.

When should I replace my deep cycle battery?

Properly maintained deep-cycle batteries should last for 6 or more years. Unfortunately some RV owners replace RV batteries every year or two. Extending battery life is not difficult; it just requires some basic care & maintenance.