Semi-Truck Batteries — Class 8 Tractor Battery Finder

Semi-truck battery banks explained

North-American Class 8 tractors commonly use three or four BCI Group 31 batteries in parallel at 12 V. European tractors typically run 24 V with two large batteries in series.

Total CCA of the bank must meet the engine maker's cold-cranking requirement.

Sleeper cabs add hotel loads (fridge, inverter, HVAC): consider dual-purpose AGM or a separate auxiliary bank with low-voltage disconnect.

Lithium auxiliary packs need a compatible charging system.

Use the truck bank calculator to combine cranking and hotel requirements.

Battery references in this category

Battery references with manufacturer source
Battery	Technology	Voltage	Capacity	CCA	Approx. weight	Source
Exide AGM EK508 EK508	AGM	12 V	50 Ah	800 std. n/s	17.5 kg	exidegroup.com
Exide AGM EK700 EK700	AGM	12 V	70 Ah	760 std. n/s	n/p	exidegroup.com
Exide AGM EK800 EK800	AGM	12 V	80 Ah	800 std. n/s	n/p	exidegroup.com
Exide Dual AGM EP800 EP800	AGM	12 V	95 Ah	850 std. n/s	26.1 kg	exidegroup.com
Interstate MTX MTX-24F-EFB MTX-24F-EFB	EFB	12 V	n/p	750 std. n/s	n/p	interstatebatteries.com
Interstate MTX MTX-34 MTX-34	AGM	12 V	60 Ah	740 std. n/s	n/p	interstatebatteries.com
Interstate MTX MTX-35 MTX-35	AGM	12 V	55 Ah	650 std. n/s	n/p	interstatebatteries.com
Interstate MTX MTX-48/H6 MTX-48/H6	AGM	12 V	70 Ah	760 std. n/s	n/p	interstatebatteries.com
Interstate MTX MTX-78 MTX-78	AGM	12 V	60 Ah	740 std. n/s	n/p	interstatebatteries.com
OPTIMA REDTOP RT S 4,2 802 250 000 888 2	AGM	12 V	50 Ah	815 EN	17.2 kg	uk.optimabatteries.com
OPTIMA REDTOP RT R 4,2 803 251 000 888 2	AGM	12 V	50 Ah	815 EN	17.2 kg	uk.optimabatteries.com
OPTIMA REDTOP RT U 4,2 804 250 000 888 2	AGM	12 V	50 Ah	815 EN	17.6 kg	uk.optimabatteries.com
OPTIMA BLUETOP BT DC 4,2 816 253 000 888 2	AGM	12 V	55 Ah	765 EN	19.7 kg	uk.optimabatteries.com
OPTIMA REDTOP RT U 3,7 822 255 000 888 2	AGM	12 V	44 Ah	730 EN	15 kg	uk.optimabatteries.com
OPTIMA REDTOP RT R 3,7 835 255 000 888 2	AGM	12 V	44 Ah	730 EN	14.4 kg	uk.optimabatteries.com
OPTIMA BLUETOP BT DC 5,5 852 188 000 888 2	AGM	12 V	75 Ah	975 EN	26.5 kg	uk.optimabatteries.com
VARTA Dynamic EFB 560500064 560500064	EFB	12 V	60 Ah	640 std. n/s	n/p	varta-automotive.com
VARTA Dynamic AGM 560901068 560901068	AGM	12 V	60 Ah	680 std. n/s	n/p	varta-automotive.com
VARTA Dynamic EFB 570500076 570500076	EFB	12 V	70 Ah	760 std. n/s	n/p	varta-automotive.com
VARTA Dynamic AGM 570901076 570901076	AGM	12 V	70 Ah	760 std. n/s	n/p	varta-automotive.com
VARTA Dynamic AGM 580901080 580901080	AGM	12 V	80 Ah	800 std. n/s	n/p	varta-automotive.com
VARTA Dynamic AGM 595901085 595901085	AGM	12 V	95 Ah	850 std. n/s	n/p	varta-automotive.com
VARTA Dynamic AGM 605901095 605901095	AGM	12 V	105 Ah	950 std. n/s	n/p	varta-automotive.com

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Listed because the manufacturer’s data matches this category (type or technology). Being listed does not mean the battery suits your system — check its datasheet.

Battery Atlas does not list vehicle-specific fitments. Check the battery label or owner’s manual, or identify the vehicle by VIN. Identify a vehicle by VIN