I. Definition of an Electric Forklift

An electric forklift is an industrial handling vehicle powered by an electric motor (usually supplied by a storage battery). It drives the traveling system and hydraulic lifting system via the electric motor to realize cargo loading, unloading, handling, stacking and other operations. Operating primarily on electrical energy stored in batteries without fuel combustion, it is widely used in warehouses, workshops, indoor logistics and work scenarios with high environmental protection requirements. Common types include counterbalance electric forklifts, reach electric forklifts, electric pallet jacks, electric stackers, etc.

II. Core Differences Between Electric Forklifts and Internal Combustion Forklifts

1. Power Source and Working Principle

• Electric forklifts: They use storage batteries (lead-acid batteries, lithium batteries, etc.) as the energy source. The electric motor converts electrical energy into mechanical energy to drive the wheels and power the hydraulic system for lifting cargo, with no combustion or exhaust emissions during power transmission.

• Internal combustion forklifts: They run on diesel, gasoline or liquefied petroleum gas (LPG). The internal combustion engine generates power by burning fuel to drive the transmission system and hydraulic system, producing exhaust emissions during operation.

2. Operating Environment Adaptability

• Electric forklifts: Featuring zero exhaust emissions and low noise levels (usually 60–70 decibels during operation), they are more suitable for indoor operations (such as warehouses, workshops, supermarkets), enclosed/semi-enclosed spaces (such as cold storage facilities, basements) and environments sensitive to pollution and noise (such as food processing workshops, pharmaceutical warehouses). Some outdoor electric forklifts can operate on flat outdoor ground, but their endurance and climbing capacity are limited by battery performance.

• Internal combustion forklifts: With strong power output, unrestricted endurance and good adaptability to complex road conditions (such as uneven surfaces, steep slopes), they are ideal for heavy-duty outdoor operations (such as ports, mines, construction sites) and long-term continuous working scenarios. However, they cannot be used in enclosed spaces, as this may lead to carbon monoxide poisoning.

3. Operation and Maintenance Costs

• Electric forklifts:

• Low energy consumption cost: Electricity costs are much lower than fuel costs (for the same workload, electricity costs are about 1/3–1/2 of fuel costs).

• Simple maintenance: Without complex internal combustion engine components (such as engines, gearboxes, exhaust pipes), only regular inspections of batteries, motors and hydraulic systems are required, resulting in low maintenance frequency and cost.

• High battery cost: Lead-acid batteries have a service life of about 2–3 years, while lithium batteries last around 5–8 years, but their initial purchase cost is higher than that of fuel-powered forklifts.

• Internal combustion forklifts:

• High energy consumption cost: Continuous fuel consumption generates ongoing expenses, and fuel price fluctuations affect operating costs.

• Complex maintenance: Regular replacement of wearing parts such as engine oil, filters and spark plugs is necessary, and engine maintenance is required frequently, leading to higher long-term maintenance costs than electric forklifts.

• Low initial purchase cost: For forklifts of the same tonnage, the price of internal combustion forklifts is usually 10%–30% lower than that of electric forklifts.

4. Performance Characteristics

• Electric forklifts: They boast smooth start-up, easy operation (stepless speed change) and precise speed regulation, making them suitable for delicate handling tasks. However, their full-load climbing capacity is relatively weak (the maximum climbing angle is usually 10°–15°), and their endurance is limited by battery capacity (lead-acid batteries offer about 6–8 hours of operation, while lithium batteries provide around 8–12 hours). Additionally, battery performance may decline in low-temperature environments.

• Internal combustion forklifts: They deliver strong power output and excellent full-load climbing capacity (diesel forklifts can climb up to 20°–25°). Their endurance is unlimited (continuous operation is achievable by refueling), and their performance is less affected by high or low temperatures. Nevertheless, they produce significant vibration and high noise during operation (around 80–90 decibels), and gear shifting is more complex than that of electric forklifts.

5. Environmental and Safety Features

• Electric forklifts: With zero exhaust emissions, they meet environmental protection requirements (especially suitable for "carbon neutrality" scenarios). They have no risk of fuel leakage and cause no pollution to cargo (such as food, medicines) or the working environment. Standardized charging procedures should be followed (to avoid overcharging and short circuits), but overall, they have fewer potential safety hazards than internal combustion forklifts.

• Internal combustion forklifts: Their exhaust contains pollutants such as carbon monoxide and nitrogen oxides, causing high noise pollution and posing risks of fuel leakage and fire. They are relatively safe for use in well-ventilated outdoor environments, but regular inspections of exhaust treatment devices are required.