24V vs 36V vs 48V Forklift Battery: Full Comparison for Buyers

A 24V, 36V, or 48V forklift battery corresponds to a specific electrical platform. The voltage affects the forklift’s controller, traction motor, hydraulic system, wiring, contactors, charger, and communication settings.

The voltage should therefore be selected according to the forklift manufacturer’s specification. A truck designed for 24V normally requires a 24V-class battery, while a 36V or 48V truck requires the corresponding voltage. Changing the voltage is not a direct battery replacement and requires evaluation of the complete electrical system.

After confirming voltage, buyers still need to determine the required capacity, discharge current, battery dimensions, weight, connector, charger, and CAN communication. This comparison explains how these factors differ across 24V, 36V, and 48V forklift battery systems.

24V vs 36V vs 48V Forklift Battery Comparison

Toyota currently provides forklift lithium-ion battery configurations in 24V, 36V, and 48V classes. Its published specifications also show that compartment width, battery weight, and available Ah ranges vary across these voltage platforms.

Voltage Is Determined by the Forklift

The forklift’s rated voltage should be confirmed before comparing battery capacity or price.

Check the following sources:

• Forklift data plate

• Existing battery label

• Operating or service manual

• Controller specification

• Wiring diagram

• Existing charger label

• Forklift manufacturer’s battery requirements

The battery voltage affects:

• Traction motor operation

• Hydraulic pump operation

• Controller input range

• Cable and contactor ratings

• Instrument display

• Regenerative braking

• Battery discharge indicator

• Charging interlock

• BMS communication

• Electrical protection settings

Some forklift series are available with more than one electrical configuration. For example, Hyster lists selected J30XN, J35XN, and J40XN models with either 36V or 48V battery configurations. The corresponding Ah ranges differ because voltage and capacity are configured as part of the complete truck design.

This means that lifting capacity or truck size alone cannot determine the battery voltage. Buyers must confirm the exact forklift model and configuration.

Understanding 24V Forklift Batteries

A 24V-class LiFePO4 battery commonly has a nominal voltage of 25.6V. This results from eight 3.2V lithium iron phosphate cells connected in series.

Equipment Commonly Using 24V Systems

24V systems are frequently found in:

• Electric pallet jacks

• Walk-behind pallet trucks

• Rider pallet trucks

• Walkie stackers

• Compact order pickers

• Light warehouse transport equipment

Toyota, for example, lists a walkie stacker with a 24V lithium-ion battery, while LITHIUM STORAGE lists 24V batteries for pallet jacks and electric stackers.

The exact application still depends on the truck manufacturer. Some compact trucks can be offered with a different voltage, so the equipment data plate remains the primary reference.

Listed 24V Capacity Options

The target product range currently includes the following 24V-class configurations:

LITHIUM STORAGE lists these configurations for equipment including pallet jacks, stackers, and other 24V material-handling vehicles.

The capacity should be selected according to working time, lifting frequency, travel distance, load weight, and charging opportunities.

Current Requirements in a 24V System

At a fixed power demand, a 24V system draws more current than a 36V or 48V system.

Using the simplified formula:

Current = Power ÷ Voltage

For a 12kW power demand:

• At 24V: approximately 500A

• At 36V: approximately 333A

• At 48V: approximately 250A

This calculation does not represent the exact current of a specific forklift because actual systems include efficiency losses and changing loads. It demonstrates why continuous and peak current ratings must be verified separately from capacity.

A 24V battery proposal should specify:

• Continuous discharge current

• Peak discharge current

• Permitted peak duration

• Maximum charging current

• Cable cross-section

• Connector current rating

• BMS current limits

Understanding 36V Forklift Batteries

A 36V battery platform is used in a range of established forklift fleets, particularly in North America. Lithium replacement packs can use a nominal voltage defined by the cell configuration and the truck’s approved controller range.

Equipment Commonly Using 36V Systems

36V systems appear in equipment such as:

• Stand-up counterbalance forklifts

• Reach trucks

• Rider warehouse trucks

• Selected three-wheel forklifts

• Selected four-wheel counterbalance forklifts

• Existing fleets originally powered by 36V lead-acid batteries

Hyster lists several electric forklift models with 36V configurations, including selected 3,000–4,000 lb counterbalance trucks. Some of the same models are also offered with 48V systems.

This overlap shows that 36V and 48V are not simply labels for different lifting capacities. They represent different electrical configurations approved for specific truck versions.

Listed 36V Configuration

LITHIUM STORAGE currently lists a 36V 684Ah forklift battery configuration for Crown equipment.

Before using a 36V lithium battery to replace a lead-acid pack, confirm:

• Nominal and maximum battery voltage

• Controller input-voltage range

• Existing battery Ah

• Minimum battery weight

• Battery compartment dimensions

• Charge and discharge connectors

• CAN protocol

• Charger requirements

A 36V forklift should not be converted to 48V solely because more 48V battery capacities are available. Such a change affects the controller, motors, wiring, instruments, contactors, and charger.

Why Ah Ratings Differ Between 36V and 48V Trucks

Forklift specifications can show a larger Ah value for a 36V battery than for a 48V battery in the same truck family.

For example, Hyster lists:

• 36V configurations from 880Ah to 1,100Ah

• 48V configurations from 660Ah to 770Ah

for selected J30–40XN models.

This does not mean the 36V battery necessarily stores more usable energy. Total nominal energy should be compared in kilowatt-hours.

For example:

• 36V × 1,000Ah = 36kWh

• 48V × 750Ah = 36kWh

The Ah values differ, while the calculated nominal energy is the same.

Understanding 48V Forklift Batteries

A 48V-class LiFePO4 battery commonly has a nominal voltage of 51.2V, based on sixteen 3.2V cells connected in series.

Equipment Commonly Using 48V Systems

48V configurations are found in:

• Reach trucks

• Stand-up rider forklifts

• Three-wheel counterbalance forklifts

• Four-wheel counterbalance forklifts

• Tow tractors

• Industrial vehicles

• Selected scissor lifts and access equipment

Toyota lists 48V lithium-ion options across parts of its material-handling range, while LITHIUM STORAGE lists 48V battery configurations for industrial vehicles and several forklift platforms.

The truck’s approved electrical specification remains necessary because equipment within the same general category can use 24V, 36V, 48V, or another voltage.

Listed 48V Capacity Options

The target product range currently includes:

These capacities allow a 48V battery system to be configured for different compartment sizes, energy requirements, truck weights, and charging schedules.

A larger Ah figure should not be selected automatically. Capacity should match the measured or estimated energy consumption of the forklift.

Comparing Voltage, Ah, and kWh

Voltage and Ah describe different battery characteristics.

• Voltage relates to the forklift’s electrical platform.

• Amp-hours measure stored charge.

• Kilowatt-hours represent nominal stored energy.

• Discharge current indicates how quickly the battery can deliver power.

The nominal energy calculation is:

Energy in kWh = Voltage × Capacity in Ah ÷ 1,000

Example Comparison

These three example packs contain the same calculated nominal energy but operate at different voltages and Ah ratings.

They are not interchangeable because the forklift controller, motors, charger, connector, and wiring must correspond to the battery voltage.

Does Voltage Determine Runtime?

Voltage alone does not determine how long a forklift operates.

Runtime depends on:

• Usable battery energy

• Average traction power

• Hydraulic power consumption

• Load weight

• Travel distance

• Lift height

• Number of lifts

• Ramp use

• Attachments

• Floor condition

• Working temperature

• Operator behavior

• Charging schedule

A 24V battery with 11.67kWh of nominal energy and a 48V battery with 11.67kWh contain the same calculated nominal energy. Their actual runtime will differ when installed in different trucks because the vehicles have different motors, weights, workloads, and efficiency levels.

For this reason, capacity should be selected using operating data from the exact forklift.

How Voltage Affects Current

At the same power level, current decreases as voltage increases.

For a simplified 18kW demand:

This affects the design of:

• Battery cells and busbars

• Power cables

• Connectors

• Contactors

• Fuses

• Controller components

• Thermal management

• BMS current settings

It does not mean one voltage should replace another. Each forklift electrical system is designed around its rated voltage and current requirements.

When comparing quotations, ask each supplier to provide continuous and peak current rather than assuming the voltage and Ah ratings are sufficient.

Battery Dimensions Vary by Voltage and Truck Model

Battery dimensions depend on more than voltage. They are also influenced by:

• Capacity

• Cell format

• Internal module arrangement

• Required ballast

• Compartment size

• Connector position

• Battery removal method

• Cooling and heating components

Toyota’s published 24V, 36V, and 48V battery ranges show different compartment widths, weights, and capacity ranges across the three platforms. The document also notes that some capacities are available only for certain truck models.

Do not use these dimensions as universal industry standards. They illustrate why voltage alone cannot confirm physical fit.

Before requesting a quotation, provide:

• Compartment length

• Compartment width

• Compartment height

• Existing battery dimensions

• Maximum permitted dimensions

• Cable outlet location

• Connector location

• Battery removal direction

• Lifting points

• Restraint arrangement

A dimensional drawing should be approved before production.

Battery Weight and Counterbalance

The traction battery can form part of the forklift’s counterweight. A lithium battery can therefore require integrated ballast to meet the truck manufacturer’s specified battery-weight range.

Confirm:

• Existing battery weight

• Minimum permitted battery weight

• Maximum permitted battery weight

• Required center of gravity

• Available compartment space

• Ballast design

Toyota’s lithium battery information specifically includes built-in counterweight and adjustable spacers for truck weight and compartment requirements.

This issue applies to 24V, 36V, and 48V systems. It is determined by the forklift design rather than voltage alone.

Charger Requirements for Each Voltage

Each voltage class requires a charger configured for the corresponding lithium battery system.

A battery charger must match:

• Battery nominal and maximum voltage

• Battery chemistry

• Maximum charging current

• BMS charging protocol

• Connector type

• AC input voltage

• Site electrical capacity

• Charging schedule

A 24V charger cannot directly charge a 36V or 48V battery. A charger carrying the same general voltage label should still be checked for charging profile, connector, current, and CAN communication.

Toyota supplies lithium-compatible chargers controlled by the battery management system, while LITHIUM STORAGE lists separate 24V and 48V lithium battery charger categories.

For mixed-voltage fleets, charging areas should clearly separate the different systems or use approved charging equipment configured to prevent connection errors.

Charging Time Depends on Capacity and Charger Current

Charging time is not set by voltage alone.

A simplified estimate is:

Charging time = Battery capacity in Ah ÷ Charger current in A

For example:

• 304Ah battery ÷ 100A charger = approximately 3.04 hours

• 456Ah battery ÷ 150A charger = approximately 3.04 hours

• 684Ah battery ÷ 200A charger = approximately 3.42 hours

Actual charging time can be longer because the BMS adjusts current according to state of charge, temperature, cell balance, and the charging curve.

The supplier should calculate the expected energy recovered during:

• Meal breaks

• Shift changes

• Overnight charging

• Production stops

• Other available charging periods

BMS and CAN Communication

Modern lithium forklift batteries commonly use a battery management system to monitor:

• Cell voltage

• Pack voltage

• Current

• Temperature

• State of charge

• Charge and discharge limits

• Contactor status

• Fault conditions

The BMS can also communicate with the forklift and charger through CAN bus.

Toyota states that its BMS communicates critical battery information to compatible forklifts and chargers. LITHIUM STORAGE lists charger communication commissioning, connector adaptation, and remote battery monitoring among its system functions.

The following details should be confirmed:

• Forklift CAN protocol

• Charger CAN protocol

• Communication speed

• Connector pinout

• Dashboard integration

• State-of-charge display

• Fault-code handling

• Commissioning responsibility

A battery can match the voltage and physical dimensions but still require communication configuration before the truck operates correctly.

Comparing the Three Voltages by Operating Information

The following table shows how operating data should be used. It does not rank the three voltage classes.

The voltage is confirmed first. The remaining information is then used to configure the battery within that voltage platform.