Group GC8 and Group GC8H - 8 Volt Golf Cart Batteries
BCI Group GC8 and Group GC8H batteries are heavy-duty, deep cycle batteries, very similar to GC2 and GC2H batteries.
BCI Group GC8 and Group GC8H batteries are often used as deep cycle batteries in golf carts, but also in marine applications, off-the-grid applications, for powering medical and security systems, and similar.
Updated: May 10, 2021.
GC8 and Group GC8H Batteries Features and Specifications
BCI Group GC8 and Group GC8H batteries are very similar batteries, differing practically only in dimensions (L x W x H):
- Group GC8: 10 3/8 x 7 3/16 x 10 7/8 inches (10.375 x 7.1875 x 10.625 inches, 264 x 183 x 277 mm),
- Group GC8H: 10 3/8 x 7 3/16 x 11 5/8 inches (10.375 x 7.1875 x 11.625 inches, 264 x 183 x 295 mm).
Note: Groups GC8 and GC8H feature almost the same physical dimensions as Groups GC2 and GC2H respectively, except that GC2 and GC2H batteries feature nominal voltage of 6V and GC8 and GC8H batteries feature nominal voltage of 8V.
GC8 and GC8H batteries are almost exclusively 4-cell lead-acid batteries featuring nominal voltage of 8 volts and nominal (20h) capacity in the 165-190 Ah range, with RC value of 290-320 minutes and weight in the 60-75 pounds (~27 - 34 kg) range.
GC8 and GC8H batteries are not as popular as 6V GC2 and GC2H batteries because with 6V GC2 and GC2H batteries one may easily make 12V (2 batteries connected in series), 24V (4 batteries), 36V (6 batteries), and 48V (8 batteries) battery packs, while with 8V GC8 and GC8H one can make 'only' 24V (3 batteries connected in series) and 48V (6 batteries) battery packs.
But, when making battery packs with GC8 and GC8H batteries, one needs fewer batteries, which means less wiring.
Wet/flooded lead-acid GC8 and GC8H are the most common - they are not spill-proof, they are not maintenance-free batteries, but they are heavy-duty batteries with thick plates that can withstand a large number of charging/discharging cycles and they require distilled water to be added regularly.
AGM/Gel-Cell lead-acid GC8 and GC8H batteries are not as common as wet/flooded because, despite VRLA (Valve Regulated Lead-Acid) technology and the recombination of up to 99% of hydrogen and oxygen, they do lose water over time - they cannot withstand the number of charging/discharging cycles of well maintained, high-quality wet/flooded lead-acid batteries.
Lithium GC8 and GC8H batteries practically don't exist. The reason is very simple - lithium deep cycle batteries are based on Lithium Iron Phosphate (LiFePO4) chemistry that features 3.2V nominal voltage. Hence, LiFePO4 lithium batteries may be 6V or 12V, but not 8V batteries.
Some manufacturers offer 12V LiFePO4 batteries using the size and shape of 6V GC2/GC2H and 8V GC8 and GC8H batteries.
For the list of such lithium batteries, please check our Group GC2 and Group GC2H Golf Cart Batteries article.
GC8 and GC8H golf cart batteries are also commonly used in other 24V and 48V applications, including trolling motor batteries, RV house batteries, solar/off-the-grid applications, and similar.
But, since they are flooded lead-acid batteries, they must be stored in well-ventilated areas to prevent the buildup of very flammable hydrogen and their electrolyte levels must be periodically checked.