In the global race toward “Double Carbon” goals, the construction machinery sector is undergoing a profound green transformation. On March 31, 2026, Sunward Intelligent once again stunned the industry by launching a new series of heavy-duty equipment in Changsha. In the quest for carbon neutrality, Sunward has introduced its groundbreaking Electric Rotary Drilling Rig series, setting a new benchmark for green construction technology in sustainable foundation engineering.
The Star Model: SWDM620E
The undisputed centerpiece of the event was the SWDM620E, a colossal engineering marvel that currently holds the title of the world’s largest high-torque electric rotary drilling rig. With a massive 620 kN·m output torque and a 200-ton operating weight, this “Titan” is specifically designed to tackle ultra-deep bridge piles and hard-rock layers that were once the sole domain of traditional diesel giants.
As a flagship Electric Rotary Drilling Rig, it seamlessly integrates raw hydraulic power with the surgical precision of modern electrical control systems. This synergy allows for smoother operations and higher hole-forming accuracy, even in the most challenging geological conditions. Moreover, it effectively solves the industry’s most stubborn pain points—exorbitant fuel costs and disruptive noise pollution—by utilizing an advanced range-extended architecture. Whether operating in noise-sensitive urban centers or remote sites with limited power grids, the SWDM620E delivers zero-emission efficiency and a significantly reduced total cost of ownership, marking a true paradigm shift in sustainable foundation engineering.
Core Parameters
| Parameter | Specification/Value |
| Model | SWDM620E |
| Power Type | Range-Extended Electric |
| Max. Output Torque | 620 kN·m |
| Operating Weight | 200 t |
| Max. Drilling Diameter | 3500 mm |
| Max. Drilling Depth | 100 m+ |
| Energy Recovery Rate | > 70% |
Technical Breakthrough: The Power of Range-Extension
This innovative electric rotary drilling rig utilizes a sophisticated energy recovery system that captures gravitational potential energy during the winch lowering process. This energy is converted back into electricity, significantly reducing overall power consumption. With three operating modes—pure electric, plug-in, and range-extended—it offers unparalleled flexibility for diverse job sites, from urban centers with strict noise limits to remote areas with limited power grids.
Market Prospects and Future
The market’s response was immediate and enthusiastic. At the launch event, Sunward secured orders for 20 units, totaling 120 million RMB. As market demand for zero-emission foundation equipment, Sunward’s Electric Rotary Drilling Rig is set to lead the charge in the global transition toward high-efficiency, zero-emission foundation equipment.
FAQ
The SWDM620E Electric Rotary Drilling Rig features a flexible “3+N” power mode (Pure Electric, Plug-in, and Range-Extended). In remote areas without a power grid, the built-in high-efficiency engine acts as a generator to charge the battery, ensuring continuous 24-hour operation. This eliminates the downtime typically required for charging traditional pure electric machinery, making it as reliable as diesel models but with significantly lower energy costs.
Yes, the long-term ROI is superior. While the initial purchase price may be higher, the Electric Rotary Drilling Rig reduces comprehensive energy consumption by over 40% compared to diesel counterparts. Furthermore, its advanced energy recovery system captures up to 70% of gravitational potential energy during winch lowering. Combined with lower maintenance costs (fewer engine parts to service), most fleet owners can recover the price premium within 1.5 to 2 years of high-intensity operation.
