Welcome to this web page! You have made the right click! This article contains the most significant and considerable differences between group 24 and group 27 deep cycle batteries.
However, before you get the contrast in detail, you had better learn what a deep-cycle battery is. Also, you should have a brief concept about both batteries. Are you ready for the move?
Okay, here we go!
Deep-Cycle Battery
A deep-cycle battery uses most of its energy and gets discharged on a regular basis. Experts use the term “deep-cycle” mainly for lead-acid batteries. It is designed to give us sustainable power over a long period of time. Such a battery can serve until it loses 80% of its charge!
Group 24 vs Group 27 Deep Cycle Battery
BCI Group 24 batteries and BCI Group 27 batteries have similarities in different aspects. If you see their types, dimensions, chemistry, and usage, you cannot but agree with us. You can even use them interchangeably.
At the same time, they differ in some respects. And you had better go through them in detail. These are as follows:
Capacity
Let us share the average capacity of these deep cycle batteries. The 24 group battery features a nominal (20h) capacity of 75-85 Ah. Moreover, its reserve capacity is of 140-180 minutes. This battery’s weight ranges from 43 to 57 pounds or 19.5 to 25.9 kg.
On the contrary, the group 27 battery features a nominal (20h) capacity of 66-110 Ah. Its weight ranges between 54 to 70 pounds or 24.5 to 32 kg. And the reserve capacity of this battery is 140-220 minutes.
Please note that the internal construction of these batteries depends on their weight.
Dimensions
Allow us to illustrate the dimensions of these deep cycle batteries a bit elaborately. We have attached two tables for the sake of your convenience.
BCI Group 24 Battery
Image: BCI Group 24 Battery; Source: Ubuy
The dimension of this battery group is 10.25 x 6.8125 x 8.875 inches or 260 x 173 x 225 mm in (L x W x H). However, there are some subgroups. Let us mention their dimensions as well through the table below!
| BCI Group Size | L x W x H (inches) | L x W x H (mm) |
| 24 | 10 1/4 x 6 13/16 x 8 7/8 | 260 x 173 x 225 |
| 24T | 10 1/4 x 6 13/16 x 9 3/4 | 260 x 173 x 248 |
| 24F | 10 3/4 x 6 13/16 x 9 | 273 x 173 x 229 |
| 24R | 10 1/4 x 6 13/16 x 9 | 260 x 173 x 229 |
| 24H | 10 1/4 x 6 13/16 x 9 3/8 | 260 x 173 x 238 |
There are differences in height and length in group 24 batteries. Besides, they differ in other aspects. It would help best to verify the size, type, chemistry, and orientation at the time of purchasing.
BCI Group 27 Battery
Image Source: BatterySharks.com
On the contrary, the dimension of group 27 battery is 12.0625 x 6.8125 x 8.875 inches or 306 x 173 x 225 mm in (L x W x H). And it has some subgroups and the features of that group are as follows!
| BCI Group Size | L x W x H (inches) | L x W x H (mm) |
| 27 | 306 x 173 x 225 | 12 1/16 x 6 13/16 x 8 |
| 27H | 11 3/4 x 6 13/16 x 9 1/4 | 298 x 173 x 235 |
| 27F | 12 1/2 x 6 13/16 x 8 15/16 | 318 x 173 x 227 |
Experts also compare both group batteries depending on “standard” group sizes. The standard group dimension of the group 24 is 10.25 x 6.8125 x 8.875 inches or 260 x 173 x 225 mm, whereas the group 27 features 12.0625 x 6.8125 x 8.875 inches or 306 x 173 x 225 mm.
Now, do you want to know how both actually differ in size? Well, it is 1.8125 inches or 46 mm in length. However, they are identical in width (6.8125 inches or 173 mm) and height (8.875 inches or 225 mm).
And, interestingly, due to the difference in size, the battery compartments intended for group 24 batteries usually can’t accept group 27 batteries. However, battery compartments intended for group 27 batteries may grant group 24 batteries.
Chemistry
No matter if it is 24 or 27, the most common BCI Group battery chemistries are Absorbent Glass Mat (AGM) and Sealed Lead Acid (SLA). However, you will also see other chemistries such as –
- Gel-cell batteries
- Flooded batteries
- Lithium-ion batteries
Amp Hours
Compared to the group 24 battery, the amp hours are a bit higher in the group 27 battery. This specification differs depending on a specific purpose. Generally, any group size consisting of a higher number comprises additional amp hours than lower values.
Application
The Be-Connected International (BCI) Group is the producer of these deep cycle batteries. You will find usage of the 24 group battery in several sectors such as –
- large UPS systems
- medical and security systems
- wheelchairs
- vehicles, and
- industrial applications
- standby/float applications
Apart from these, you can see its application as starting or cranking battery. However, this is rare.
On the other hand, you can employ the group 27 battery in off-the-grid, RVs, automotive, marine, and similar applications. These sorts of applications have made them one of the most popular battery groups. At the same time, they are affordable too!
However, particularly you should NOT use the AGM SLA group 27 battery as a starting battery. Just for one exception, you can employ it at least for smaller engines as starting battery. In that case, the MCA value would be around 800 Amps only.
On Affordability and Flexibility
You will have the group 24 batteries cheaper than group 27 batteries. Apart from that, you might be looking for a more flexible option. In this regard, you may find group 24 more handy or suitable. For example, it is easier to find a blem group 24 than a group 27!
Popularity
Don’t know what do you mean by the word ”popular”? In consumer products, popularity is equal to reliability. That means, the more a product becomes popular, the more it is reliable. Anyway, let us introduce you to the most popular models of these deep cycle batteries.
Group 24 Batteries
- ACDelco M24AGM
- VMAXTANKS SLR-85
- Mighty Max ML75-12
- VMAXTANKS MB107-85
- Weize FP12750/TL1275
- NorthStar NSB-AGM24F
- UPG UB12750
- VMAXTANKS MR107-85
Group 27 Batteries
- GreenLiFE GL80-80AH
- Optima 8027-127 D27M
- VMAXTANKS SLR100
- Mighty Max ML100-12
- NorthStar NSB-AGM27
- VMAXTANKS XTR27-110
- UPG UB121000
- VMAXTANKS MR127-100
Duration
The lifespan of a deep cycle battery depends on the frequency of use. However, we can tell you the average lifetime of a group 24 and 27 battery.
Usually, the group 24 starting batteries can survive around 3 to 12 months. And AGM batteries can serve you for 4 to 8 years, whereas flooded and gel deep cycle batteries can last up to 5 years. On the contrary, the group 24 starting batteries can survive around 140 to 220 minutes. Now you may convert this in hours as well.
Let’s see another example. With a 15 amp load, the Interstate Batteries group 27 can serve 0.6 hours longer than their group 24. And let not your charging routine affect the battery life.
Warranty
Here we will exemplify through certain brands. The OPTIMA BLUETOP group 24 battery offers a two-year free replacement warranty. Then what about other Group 24 batteries, right?
Well, they may either come with warranties as short as one-year or a pro-rated warranty. Any car manufacturer generally provides its customer with a 48-month warranty. You can enjoy a full free replacement warranty in the first 24 months, and the rest of 24 months will constitute the pro-rated or pro-rata warranty period.
On the contrary, if you purchase a group 27 battery, let’s say it is an EverStart Maxx Lead Acid Automotive Battery consisting of 12 Volt/810 CCA, you will have a 3-year free replacement warranty.
And you may relax as these lithium group 24/27 batteries have a built-in Battery Management System (MBS). It not only monitors the operation of these batteries but also protects them from various issues such as –
- short circuit
- overheating
- overcharging
- over-discharge
- low temperature, etc.
If you are in quest of a lightweight battery, something that cycles well and lasts in the long run, you may prioritize any of these lithium deep cycle group batteries.
To Sum Up
Then how are you feeling having all these differences? Hopefully well, and we are also glad to share these with you. Now you are aware of the contrast in terms of dimension, capacity, chemistry, application, Amp hour, popularity, warranty, affordability, duration, and so on.
Depending on a years-long understanding of the market, it was a slight of our endeavor. This post will benefit you in the long run for sure! Have a good day!
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