What does group mean on marine battery?
Marine battery group size is one of many specifications found on boat batteries. The group size is simply the physical dimensions of the battery housing as set by the BCI (Battery Council International). The size can increase in either length, width, or height, so it’s important to consult the charts.
What is group size for marine battery?
Batteries come in range of sizes. Terms that you will often hear are group 24, 27, 31, 4D, and 8D. The group has nothing to do with the actual capacity of the battery, but merely relates to the physical size.
Does group size matter for marine battery?
In general, a larger group size means the battery will last longer. It will also be able to simultaneously power more functions on your boat such as fish finders, radios, and pumps. Many boats are able to support more than one group size.
What are the different groups of marine batteries?
There are four different chemical types of marine batteries for your boat: wet cell (flooded), gel cell, absorbed glass mat (AGM), which are all lead-acid batteries, and lithium.
What is a group 21 battery?
BCI Battery Group Size Chart
| BCI Group Size | L x W x H (mm) | L x W x H (inches) |
|---|---|---|
| 21 | 208 x 173 x 222 | 8 3/16 x 6 13/16 x 8 3/4 |
| 21R | 208 x 173 x 222 | 8 3/16 x 6 13/16 x 8 3/4 |
| 22F | 241 x 175 x 211 | 9 1/2 x 6 7/8 x 8 5/16 |
| 22HF | 241 x 175 x 229 | 9 1/2 x 6 7/8 x 9 |
Why do boats have 3 batteries?
Why Does My Boat Have 3 Batteries? Boats with twin engines, or a trolling motor will generally have three batteries. This is so that the each engine has it’s own starting battery, and so that there is a separate house battery to run all of the electronics on the boat.
What are the group sizes of marine batteries?
Although the BCI group size range is quite broad, including passenger car, electric vehicle, and commercial batteries, today we’ll focus on sizes commonly used in marine applications. These include batteries that fall into Group 24, Group 27, Group 31, and 8D.
What are the different types of relion marine batteries?
So, when you look in your watercraft battery compartment and see 24F, 24T, or any other Group 24 battery you can rest assured that the RELiON Group 24 will fit within your previous battery’s footprint. The same holds true for the Group 27, 31, and 8D. Marine batteries come in three main types that include deep cycle, starting, and dual-purpose.
What’s the difference between group 24 and 27 deep cycle batteries?
If you compare a group 24 battery and group 27 deep cycle battery together, you’ll notice that the mp hours are slightly higher on the group-27 product. This specification difference is made on purpose by the manufacturers.
What to look for in a marine battery?
For marine applications, look for group sizes indicating the letter “M.” These batteries are designed for watercraft applications. Although you may find the right group size for your vessel, don’t use a battery without the “M” designation.