Group 24 vs Group 27 Deep Cycle Battery (Know The Difference)

Did you know that having a larger deep cycle battery provides sustained performance for longer? Well, I can’t blame you if you don’t.

You see, most people don’t know the differences between the most commonly used groups of deep cycle batteries: the group 24 and group 27 batteries.

That’s why, for your convenience, I have decided to shed some light on the topic “Group 24 vs Group 27 deep cycle battery”.

The main difference between group 24 and group 27 deep cycle batteries is that the latter one will have more Ah rating. Plus, group 27 batteries will also be larger in dimension.

But, other than these, there are other benefits to having a larger group battery as well. So, let’s dive into our discussion here to know more about this.

Group 24 VS Group 27 Batteries (Differences In Brief)

We have put the differences between these two types of batteries below in a table so you can compare them real quick.

	Group 24 Battery Specs	Group 27 Battery Specs
Length	The length of group 24 batteries ranges from 260 mm to 273 mm (1.25 to 1.75 in)	The length of group 27 batteries usually ranges from 298 mm to 318 mm (11.75 to 12.5 in)
Width	The width of group 24 batteries is usually 173 mm (6 13/16 inches)	Same
Height	The height of group 24 batteries can range between 225 to 248 mm (8 ⅞ to 9 ¾ inches)	Same
Ah rating	Generally, most group 24 batteries have up to 85 Ah capacity	Group 27 batteries can have up to 110 AH capacity
RC (min)	The reserve capacity of group 24 batteries are usually up to 170-minute	Group 27 batteries can have up to 220 minutes of reserve capacity

Group 24 VS Group 27 Batteries (Differences Explained In Broad)

Now that you’ve taken a good look at the differences between these 2 groups of batteries, it’s time to go deeper into the explanation of why these differ.

The Difference in Dimensions

As you can see from the above table, group 27 batteries are slightly larger in length than group 24 batteries. You might wonder why there are differences in length between the two groups of batteries.

Well, BCI (Battery Council International) have defined the dimensions of these two groups of batteries for worldwide industrial manufacturing. As a result, international battery manufacturers are making batteries according to the guidelines of the BCI.

And, according to BCI’s predetermined dimensions, group 27 deep cycle batteries are larger than group 24 batteries. Thus, group 27 batteries are bigger in size.

Group 24 Vs Group 27 Deep Cycle Battery Amp Hours

Since group 27 deep cycle batteries are larger in size, they contain more chemical material. That, in turn, means that group 27 batteries can contain more charge than group 24 batteries.

That’s why the amp-hour rating of group 27 batteries is usually higher than most group 24 batteries.

For example, the maximum amp hour rating for a group 24 deep cycle battery is usually 85 Ah. On the other hand, the max amp-hour for group 27 batteries can be upto 110Ah.

Group 24 Vs Group 27 Battery Weight

The weight of deep-cycle batteries usually depends on the raw material. But, generally speaking, group 27 usually has more weight than group 24 batteries. It’s mainly because group 27 batteries are larger and contain more substances (liquid acids, etc).

For example, the maximum weight of group 24 deep cycle batteries can be up to 57 lb or 25.8 kg. However, the max weight of a group 27 battery can be as high as 68 lb or 31 kg.

Group 24 Vs Group 27 Battery Rc Rating

The Reserve Capacity (RC) of a deep cycle battery defines how capable a battery is. This is why, the more Reserved Capacity (RC rating in minutes) a battery has, the stronger it is.

And, since group 27 batteries are larger in size, they usually have a higher RC rating than group 24 batteries. Now, since different batteries have different RC ratings, it is not possible to compare these two types of batteries with a specific number.

However, based on data from online marketplaces, I can tell you that a group 24 deep cycle battery can have an RC rating as high as up to 170 minutes. But, group 27 batteries can have an even higher RC rating – up to 220 minutes.

Group 24 Vs Group 27 Batteries Terminal Positions

The terminal position of deep-cycle batteries is not something that is always fixed. Some batteries will have terminal ports that are very close to each other. On the other hand, there are some batteries that will have terminal ports that are farthest from each other.

And, this difference can also be seen in different models of group 24 batteries. Additionally, different models of group 27 batteries can also have different terminal positions. So, it’s not possible to draw a general distinction between these two types of batteries based on terminal positions.

Group 24 Vs Group 27 Battery CCA Rating

The CCA rating defines the performance of a battery in extremely cold temperatures. More specifically, CCA rating is the number of amps that a deep cycle battery can provide (for 30 seconds) when it’s in 0°f temperature while maintaining a voltage of 7.2 volts.

Therefore, we can understand that the higher the CCA rating of a battery, the better it performs in extremely cold temperatures. Now, in terms of CCA rating, group 27 batteries usually have a higher CCA rating than group 24 batteries.

For example, the maximum CCA rating for a group 24 battery can be up to 840 (NorthStar NSB-AGM24F). On the other hand, the maximum CCA rating for a group 27 deep cycle battery can be up to 930 (NorthStar NSB-AGM27).

Can I Use A Group 27 Battery In Place Of A Group 24 Battery? (And Vice Versa)

It is possible to place a group 24 battery in the designated position of a group 27 battery on a vehicle. It’s because a group 24 battery is smaller in size.

However, the power rating and the capability of these types of batteries are not the same (as you already know from the above discussion). Therefore, you cannot universally use these two types of batteries interchangeably.

Rather, I suggest you read the manufacturer’s recommendation regarding using these batteries interchangeably for your vehicles. It’s because some vehicles permit using group 27 batteries instead of group 24 batteries and some do not.

But, one thing is clear you should never use a group 24 battery in the place of a group 27 battery unless it’s permitted. It’s due to the fact that group 24 batteries have lesser power capability and cannot provide the same performance when in need.

Group 24 VS Group 27 Batteries: Which One Should You Buy?

The short answer for this is that you should buy exactly the type of battery that your vehicle manufacturer has recommended. Although group 27 batteries have more Ah rating and CCA rating, these are not universally interchangeable with group 24 batteries.

However, if you do have the permission/option to use either of these types of batteries, you should definitely go for group 27 batteries. It’s simply because they can provide electric power for longer compared to group 24 batteries.

Conversely, if your vehicle manufacturer has permitted the use of a lower-powered battery, you may use a group 24 deep cycle battery in place of a group 27 battery.

But, you should only do that while keeping in mind that a group 24 battery is lower powered. That’s why it won’t be able to provide the same performance as a group 27 battery.

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Frequently Asked Questions

Have more queries in mind then check the following FAQ section, you’ll get most of your answers.

Which one is the better one, a Group 24 battery or a group 27 battery?

In terms of power output and performance capability, a group 27 battery is better than a group 24 battery. However, being just better doesn’t make the group 27 batteries suited to use universally.

Group 24 vs group 27 battery: Which one is best for marine vehicles?

In most cases, the larger battery is better suited for use in marine vehicles such as speed boats. Hence, it’s best to use a group 27 battery in your marine vehicle instead of a group 24 battery.

Group 24 vs. group 27 deep cycle battery for trolling motor: which one is better?

Trolling motors require high amp capability from a battery to run smoothly and consistently. This is why the larger battery you have, the better your trolling motor will perform. So, I think a group 27 battery is better suited for trolling motors.

Final Takeaway

Well, there you have it, people. By now, most probably you’ve got a clear understanding of Group 24 vs Group 27 Deep Cycle Battery.

As you can already guess, group 27 deep cycle batteries have the upper hand over group 24 batteries from all aspects. That’s why group 27 batteries are generally the more preferred option.

However, I suggest that you use only the group of batteries that your vehicle manufacturer permits. So, be sure to check the manufacturer’s recommendation before buying a certain group of batteries.

Best of luck and peace out!