Electric RTG Cranes

Finding

Electrifying RTGs is mostly a yard infrastructure job: the cranes are available, but every stacking block needs a busbar or cable-reel supply and the terminal needs substation capacity behind it

Kalmar, Konecranes, Liebherr, Mitsui E&S (with its US arm PACECO) and ZPMC all sell grid-powered RTGs, and diesel cranes can be retrofitted. The work is in the yard: conductor rails or cable-reel power points along each block, medium-voltage distribution across the terminal and enough substation capacity for many cranes hoisting at once.

China did this first and at scale. Ports including Shanghai, Ningbo-Zhoushan, Qingdao and Tianjin converted large RTG fleets from diesel to grid power from the late 2000s onward, and ZPMC supplies electric and automated RTGs worldwide. In the US, Port Houston's Barbours Cut and Bayport terminals run large RTG fleets; the Texas Gulf Coast port picture is on AustinIO's Gulf Coast nexus page.

Hoisting a loaded container draws hundreds of kilowatts for seconds; lowering it regenerates power back onto the crane's DC bus. Grid-fed cranes push that profile onto the yard network, so terminals add power conditioning, battery or supercapacitor buffers and microgrid controls. Automated RTGs (Konecranes ARTG, Kalmar AutoRTG, ZPMC) raise utilization and make the peaks more frequent.

Models

Electric RTG crane models

Grid-fed cranes (cable reel or conductor bar) first, then hybrids that keep a small diesel genset with a battery or supercapacitor buffer. Diesel-only RTGs are excluded. Cost bands are indicative ranges.

Pathways

How an RTG gets grid power

Envelope

Energy and power envelope

Class-level bands; exact values vary by crane size, spreader, lift height and throughput target.

Triggers

Infrastructure trigger points

Related

Related coverage

• Seaport Electrification
• Electric Terminal Tractors
• Autonomous Seaports
• Energy Autonomy Yard
• Microgrids
• Battery Energy Storage
• Grid Equipment Supply Chain