# How much should a 12V battery discharge?

## How much should a 12V battery discharge?

12.0 volts or below – At 12.0 volts your battery is considered to be fully discharged or ‘flat’ and should be recharged as soon as possible. The lifespan of your battery will be severely affected if it remains within this voltage range for extended periods of time.

### How low can you discharge a 12-volt battery?

The lowest limit is 10.5 volts (used in testing) and obviously unsatisfactory in practical use. Experienced RVers try to use no more than 20% to 50% of the energy available in a battery before recharging. That means they never let resting voltage get below 12.5.

How far can you discharge a 12V deep cycle battery?

Most deep cycle batteries are built to handle a 50% depth of discharge, but some can handle up to 80% discharge.

At what voltage is a 12V battery dead?

12.0 volts
Resting fully charged 12-volt batteries are around 12.8-12.9 volts, and flat dead ones are at 12.0 volts, so 12.4 volts on a resting battery means it’s about 50% charged.

## How quickly does a 12V battery discharge?

A: Any battery will eventually discharge itself. A flooded car battery discharge rate is about 1% per day at room temperature, 0.25% per day at 10 °C (50 °F) and 1.5% per day at 30 °C (86 °F).

### How do you calculate battery discharge time?

The simplest answer is if you know the electrical load on the battery, say it’s X amperes. Then if the battery is charged fully at Y ampere-hours, then the time to discharge is Y/X hours. The rate of discharge is the electrical load times time, or X amperes per hour.

A healthy 12 volt battery should maintain a voltage range from 9.6 – 10.5 volts under the load for a good 30 seconds straight.

How do you increase the discharge rate of A battery?

By placing multiple batteries in parallel, you do increase the capacity, and you CAN increase the available current. In fact, most battery packs have multiple cells both in series, to increase the available voltage, as well as in parallel, to increase the available current.

## How much should you discharge a deep cycle battery?

We recommend discharging a battery to no lower than 50% DOD, with a maximum of 80%. If you discharge the battery to 50% of its capacity instead of 100%, the battery will produce an extra 40% more amperes over the life of the battery.

What should a good 12-volt battery read?

A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage.

## How do I determine the maximum discharge current rating of batteries?

For the exact maximum discharge current rating of a specific battery brand contact the distributor or manufacturer of the battery. This chart applies to 12 Volt sealed lead acid (SLA) batteries.

### How much should I discharge the battery before charging it?

Generally speaking, the less you discharge the battery before recharge, the longer the battery will last. Most alternative-energy systems are designed to keep the battery bank at least 50% or higher. Note: The 100% voltage is NOT the recommended charging voltage (which will be higher, and multi-stage).

How many 12ah batteries are in a 36 volt battery pack?

For example a 36 Volt battery pack made from three 12 Volt 12Ah batteries is a 36 Volt 12Ah battery pack.

How does battery voltage react to charging and discharging?

Battery voltage reacts highly to charging and discharging. As a battery is charged the indicated voltage increases and, as discharging occurs, the indicated voltage decreases. With experience, one can accurately determine state of charge using a voltmeter.