How to choose a range extender for an electric vehicle?

I. Clarify Requirements: Four core Considerations before Purchasing

一、明确需求：选购前的四大核心考量

Vehicle model compatibility

车型适配性

Two-wheelers: Prioritize the portable range extender that doesn't require installation. Connect it to the charging port and use it directly.

二轮车：优先选择手提免安装款增程器，链接充电口直接使用。

For tricycles/low-speed electric vehicles: It is preferred to choose a split-type air-cooled range extender with a fuel tank, which is compact in

size and highly compatible.

三轮车/低速电动车：优先选择油箱分体式风冷增程器，体积小巧且兼容性强。

Four-wheel electric vehicle: It is recommended that the model be equipped with an integrated air-cooled range extender with a fuel tank

(for efficient heat dissipation).

四轮电动车：车型建议油箱一体式风冷增程器（散热高效）。

Recreational vehicles/logistics vehicles: They need to be equipped with high-power range extenders (such as 5kW or above), and pay attention

to energy conservation and fuel efficiency.

房车/物流车：需匹配大功率增程器（如5kW以上），并关注节能省油。

Power matching principle

功率匹配原则

Basic formula: The power of the range extender ≥ the power of the electric vehicle motor × 2 (for example, if the motor power is 3kW,

a range extender of 6kW or above should be selected).

基础公式：增程器功率 ≥ 电动车电机功率 × 2（例如电机功率3kW，需选6kW以上增程器）。

Special scenarios: Mountainous areas or high-load scenarios. It is recommended to increase the power by an additional 20%.

特殊场景：山区或高负载场景，建议额外增加20%功率。

Heat dissipation performance and type

散热性能与类型

Air-cooled: Low cost, simple maintenance, suitable for short-distance or intermittent use.

风冷：成本低、维护简单，适合短途或间歇使用。

Battery compatibility

电池兼容性

Lead-acid battery: The range extender needs to intelligently recognize the voltage, with an output voltage range of 48V to 72V.

铅酸电池：增程器需智能识别电压，输出电压范围48V-72V。

Lithium battery: Matched with a lithium battery controller, it supports a wider voltage range (such as 60-120V).

锂电池：匹配锂电控制器，支持更宽电压（如60-120V）。

Ii. Safety Certification and Quality Assurance

二、安全认证与质量保障

Avoid unbranded products. Inferior range extenders may cause risks such as electric leakage and fuel leakage.

避免无商标产品，劣质增程器可能导致漏电、燃油泄漏等风险。

Core component process

核心部件工艺

Generator: A permanent magnet generator is preferred as it features high efficiency and long service life.

发电机：优选永磁发电机，效率高、寿命长。

Heat dissipation design: The exhaust system needs to be independently isolated to prevent self-ignition caused by high temperatures.

散热设计：排气系统需独立隔离，避免高温引发自燃。

Brand and after-sales service

品牌与售后服务

Give priority to choosing the top brand with the highest sales volume, which has a large-scale production and quality assurance system.

优先选择销量第一的头部品牌，具备规模化生产与质保体系。

The recommended warranty period is ≥1 year (for core components), and it supports nationwide warranty and remote fault diagnosis.

质保期建议≥1年（核心部件），支持全国联保与远程故障诊断。

Iii. Usage Scenarios and Function Optimization

三、使用场景与功能优化

Urban transportation and rural cargo transportation for extended distances

城市代步、乡村拉货增程

We recommend the intelligent variable frequency range extender, which supports automatic start and stop (starts when the battery voltage is

lower than 20% and stops when it is higher than 80%), reducing fuel consumption by 30%.

推荐智能变频增程器，支持自动启停（电瓶电压低于20%启动，高于80%关闭），降低油耗30%。

Iv. Guide to Avoiding Pitfalls: Beware of Three Major Consumer Traps

四、避坑指南：警惕三大消费陷阱

False propaganda

虚假宣传

Avoid exaggerated descriptions such as "200% range extension" and "unlimited battery life". The actual measured range extension efficiency is

generally 50-100% of the original battery life.

避免“增程200%”“无限续航”等夸大描述，实测增程效率一般为原续航的50-100%。

Low-priced and inferior products

低价劣质品

Low-priced products mostly use aluminum wire windings (resistant to temperature differences but prone to short circuits). After disassembling

the machine, the purity of the copper wire should be ≥99.9%.

低价产品多采用铝线绕组（耐温差、易短路），拆机查验铜线纯度≥99.9%6。

Risk of illegal modification

非法改装风险

Self-installation of a range extender may cause the vehicle's circuit to overload. In some cities, it is regarded as an illegal modification

and must be operated by a certified technician.

自行加装增程器可能导致车辆电路过载，部分城市认定为非法改装，需由认证技师操作。

V. Maintenance and Care: The Key to Extending Lifespan

五、维护保养：延长寿命的关键

Engine oil replacement cycle

机油更换周期

For the first use, replace it after 20 hours; for the second use, after 50 hours; and thereafter, replace it every 100 hours (each time 0.45-0.5L).

首次使用20小时更换，第二次50小时，后续每100小时更换一次（每次0.45-0.5L）。

Daily inspection

日常检查

Check the oil circuit sealing every week and clean the heat dissipation grille every month to prevent dust accumulation from affecting efficiency.

每周检查油路密封性，每月清洁散热格栅，防止积尘影响效率。

Winter protection

冬季防护

Diesel models need to be replaced with -35# anti-freezing diesel, and gasoline models are recommended to add antifreeze 6.

柴油机型需换用-35#防凝柴油，汽油机型建议添加防冻剂6。

When choosing a high-quality range extender for electric vehicles, it is necessary to comprehensively consider vehicle model compatibility,

power requirements, safety certifications and usage scenarios.

选择一款优质的电动车增程器，需综合考量车型适配、功率需求、安全认证与使用场景。

As a leading brand in the industry, we promise:

作为行业领先品牌，我们承诺：

From raw material procurement to production processing, from quality inspection to finished product warehousing, every link is pursued

with the utmost precision.

从原料采购到生产加工，从质量检验到成品入库，每个环节精益求精。

The Quality Inspection Department strictly controls in accordance with the rules and regulations. Products that meet the standards are allowed to enter the market.

质检部严格按照规章制度严格把关，符合标准的产品准许进入市场。