What is the difference between 24V and 36V?

[StTucker]

The differences between 24V and 36V are as follows: 1. 24V DC power supply: A DC power supply has two electrodes, positive and negative, with the positive electrode having a higher potential and the negative electrode having a lower potential. When the two electrodes are connected to a circuit, the DC power supply can maintain a constant potential difference between the two electrodes, thereby forming a constant current from the positive to the negative electrode in the external circuit. 2. 36V voltage: Safety voltage refers to a voltage that does not cause direct death or disability. Under general environmental conditions, the allowed continuous contact 'safety extra-low voltage' is 36V. Industry regulations stipulate that the safety voltage should not exceed 36V, the continuous contact safety voltage is 24V, and the safety current is 10mA. The degree of harm caused by electric shock to the human body mainly depends on the magnitude of the current passing through the body and the duration of the current flow.

[SanLuna]

I've been driving heavy trucks for over a decade, all equipped with 24V systems. The advantages of 24V are truly practical – parts are readily available everywhere, and replacing a relay costs just over ten yuan. 36V is more commonly used in electric bicycles, where the higher voltage allows for thinner wires and reduced power loss. However, with higher voltage comes the need for extra caution during repairs, as sparks are more likely. The 24V system is exceptionally reliable in heavy trucks, delivering strong starts even in winter, and it has never let me down hauling tens of tons of cargo. While 36V systems do offer longer range in light vehicles, allowing e-bikes to travel an extra dozen kilometers, replacing a controller can cost around a hundred yuan. We long-haul drivers prefer 24V for its reliability and cost-effectiveness.

[LaRemington]

In repair shops, 24v and 36v systems are often handled simultaneously. 24v is commonly found in trucks and buses, while 36v is mainly used in electric motorcycles and tricycles. 24v circuits carry higher currents and are prone to blowing fuses, but the advantage is that parts are readily available everywhere. 36v systems have lower current and reduced line losses, but each inspection requires checking the insulation layer first, especially at the controller connections where issues frequently arise. With higher voltage, wires can be thinner for the same power output, but the controller module price doubles. I've repaired both systems hundreds of times, and the stability of 24v is indeed outstanding.

[MacAlyssa]

Last time I bought an electric bike, I encountered the issue of voltage selection. The seller said the mainstream now is 36v, which can run farther than 24v bikes, covering about 7-8 kilometers more on a single charge. The 36v bike indeed has stronger power, making uphill rides much easier, though the battery costs over 300 yuan more. 24v bikes are becoming increasingly rare, and it's hard to find matching accessories. I finally chose a 36v bike, but after riding it for half a year, I found it prone to leakage in rainy weather, so I later installed a waterproof cover. Voltage selection depends on your needs; for daily commuting, 36v is more worry-free.

[NadiaMarie]

From the perspective of circuit design, the efficiency improvement of 36V over 24V is quite significant. At the same power level, the current in a 36V system is reduced by one-third, and line losses are nearly halved. However, higher voltage demands more stringent insulation material requirements, and the cost of controllers doubles. In terms of battery packs, a 36V system requires 10-12 cells in series, making it more complex than the 8-cell structure of 24V systems, with a greater impact from single-cell failures. For light electric vehicles, 36V indeed offers better range and more flexible wiring layouts. Heavy-duty vehicles stick to 24V primarily for stability considerations.

[KendraAnn]

Safety is a crucial consideration when selecting voltage. A 24V system is absolutely safe, even allowing contact with wet hands without issues. A 36V system remains relatively safe in dry environments, but you may feel a slight tingling sensation when performing maintenance on rainy days. Higher voltage increases the likelihood of electrical sparks in wiring, especially in older vehicles with potential short-circuit risks. The battery compartment of a 36V system must be completely sealed, and the charging port requires professional design. In contrast, a 24V system is much simpler to repair, as even standard electricians can handle it. For rainy southern regions, opting for a 24V system offers greater peace of mind.