Excavator Electrification: Battery or Tethered Power? Decision Made After This A
July 08,2026

After the surge in popularity of converting diesel to electric in recent years, many excavator owners have an additional choice to make: when it comes to electrification, is it better to go for battery-powered or cable-powered?

Some say battery-powered is convenient, allowing work anywhere; others say cable-powered saves money, making it a pure profit after conversion. There are many opinions, but few people truly understand the differences.

We've gone through both approaches from start to finish, discussing the costs, performance, and applicable scenarios in detail, so after reading, you'll likely have a clearer idea of which path to choose.

What's the core difference between the two methods?

Let's start with the fundamental difference: the power supply method is different.

Battery-powered, as the name suggests, involves installing a set of batteries on the vehicle to supply power to the electric motor. The advantage is that the vehicle itself is a complete independent unit, without the need for any external connections, just like the original diesel vehicle, it can go wherever it wants.

What about cable-powered? There are no batteries on the vehicle; it directly connects to a power supply line, using the construction site's electrical grid for power. It's like replacing the "fuel tank" with an "electric wire," the vehicle itself doesn't carry energy and relies entirely on external supply.

This one difference determines all subsequent variations.

Battery-powered: Free to move, go anywhere

The biggest advantage of battery-powered is summed up in two words: freedom.

After the conversion, this vehicle has no difference from the original diesel excavator in terms of range — no matter how large the construction site or how scattered the positions, it can drive over without considering whether the cable is long enough or whether to move the power source. Any job a diesel machine can do, a battery-powered version can do just as well, without any scene restrictions.

Construction machinery in action

Taking the Komatsu PC240 excavator modified by Shijiazhuang Tianyuan Technology as an example, the modification plan matches Contemporary Amperex Technology Co., Limited's (CATL) latest fourth-generation 365-degree integrated battery, with Inovance controllers and Langao 105 kW motors, making the entire setup a high-end configuration in the industry.

How does this vehicle perform after modification? Let's talk about endurance first — it can work an average of 6 to 10 hours per day, with the specific duration depending on the working conditions and operating habits, heavier work consumes more power, and lighter work saves power, just like with fuel vehicles.

Heavy equipment at work

Now, let's discuss economic viability, which is everyone's biggest concern. The hourly fuel cost for the diesel version was about 120 to 130 yuan, but after converting to a battery-powered version, the hourly electricity cost is only about 40 yuan, reducing the consumption cost by 65%. This number sounds exaggerated, but a simple calculation makes it clear: working 8 hours a day saves six to seven hundred yuan, which amounts to ten to twenty thousand yuan a month, and one to two hundred thousand yuan a year.

Of course, the high degree of freedom comes at a higher cost. The battery modification cost for a 20-ton excavator is about 400,000 yuan, which is more expensive than the cable-powered version.

Cable-powered: Fixed-point operation, the king of cost-effectiveness

If battery-powered sells freedom, then cable-powered sells practicality.

The advantage of cable-powered is very straightforward: it's cheap. Not only is the modification cost much lower than the same model's battery-powered version, but the usage cost is also lower — directly connecting to the construction site's power line, with stable electricity prices, without considering subsequent costs such as battery degradation and replacement. For equipment that operates fixedly for long periods, the economic benefits of cable-powered are tangible.

Many people worry whether cable-powered will compromise performance? This concern is actually unnecessary. We understand that reliable cable-powered modifications make very few changes to the original vehicle — the wiring remains unchanged, the hydraulic lines remain unchanged, and even the plugs for oil temperature and water temperature sensors are directly plugged in without cutting wires. In short, it's just replacing the diesel engine with an electric motor,

Excavator on construction site