36V vs 48V Forklift Batteries – What makes the most sense?

The difference between a 36V and 48V forklift battery is not just size. Voltage must match the forklift's electrical system. A 36V forklift requires a 36V battery. A 48V forklift requires a 48V battery.  Some forklifts are rated to configured for either 36V or 48V.  If you’re considering that, know that system settings and BDI calibration changes will need to be made by a qualified forklift service technician.

Voltage affects how power is delivered to the forklift’s control system, drive motors, hydraulic motors, and steering motors.  Installing the wrong voltage battery can damage electrical components, create unsafe conditions, and prevent the forklift from operating properly.

In general, 36V batteries are commonly found in smaller electric forklifts, walkie riders, order pickers, and some lighter warehouse trucks.  36V batteries are still the most common battery in the United States.  48V batteries are common in many sit-down counterbalance forklifts and higher-capacity electric trucks. However, the forklift data plate should always be the deciding source.

A 48V battery is not automatically better than a 36V battery, but it does delivery higher voltage to the forklift resulting in less Amperage and heat.  The right replacement battery is the one the forklift was engineered to use. Runtime depends more on amp-hour capacity, application, charging habits, battery condition, and usage than voltage alone.

You should also match the charger to the battery voltage. A 36V battery needs a compatible 36V charger. A 48V battery needs a compatible 48V charger. 

Quick takeaway: Do not upgrade or substitute voltage. Match the forklift data plate, battery voltage, and charger voltage.