Regenerative braking and motion recovery: What to track

Is braking energy reused, or burnt in resistors?

What this tab covers The attributes worth tracking regularly, with the latest value, the direction of travel and why each matters.

Track the share of braking energy actually reused, and duty cycles at the host. Grid receptivity decides whether energy is saved or burnt in resistors.

Category	Attribute	Latest	Trend	Why it matters
Operational	Capacity factor and operating hours	RTG: one move every 83 s; Hamburg Hesop 1,042 MWh/y³⁵	→ stable	Recovery scales with how often the machine brakes or lowers.
Operational	Recovery efficiency over time	EV net regen about 22% (EPA cycle); Hesop 99% of recoverable energy¹³	↗ improving	Shows whether energy is reused or still lost in resistors.
Counterparty	Host counterparty credit and utilisation rate	Mainly transit agencies, ports and fleet operators³	→ stable	Low closure risk; utilisation (trains per hour, lifts per day) drives savings.
Impact	t CO2e avoided per dollar invested	About 81 t CO2/y per RTG crane with storage⁵	→ stable	Ranks retrofit options against full electrification.
Operational	Wear and maintenance (in place of fouling)	Flywheels to 36,000 rpm need containment; friction brake wear falls⁶	→ stable	There are no heat exchangers here; mechanical and power-electronic reliability replace fouling as the main risk.
Policy	Local carbon pricing and penalties	EU ETS allowance about EUR 88.3/t CO2 (12 October 2026, highest since late January), after a seven-week low of EUR 82.40 on 5 October; EU CBAM definitive phase since 1 January 2026, priced at ETS auction levels. India CCTS: final intensity targets for about 490 units in seven sectors (aluminium, cement, chlor-alkali, pulp and paper, refining, petrochemicals, textiles) for 2025-26 and 2026-27 against a 2023-24 base; iron and steel targets for 255 entities issued as a second draft in June 2026, with compliance from 2026-27; fertiliser still pending; first credits expected around October 2026, with trading from November 2026 to January 2027; targets designed around a cost of about USD 10/t CO2.¹²⁹⁸¹⁰¹¹¹³	↕ volatile	Carbon prices set the extra value of each tonne avoided. Even at its 5 October low of EUR 82.40 (about USD 91.87), the EU price was roughly nine times India's design level (calculated). For this tile: transport is outside both CBAM and the seven CCTS sectors, so value comes mainly from fuel and power prices.
Technology-specific	Network receptivity (DC rail)	136 reversible substations sold worldwide (2025)³	↗ improving	Without reversible substations or storage, surplus braking energy is burnt.
Technology-specific	Power quality of regenerative drives	THD 5% or less for regenerative lift drives⁴	↗ improving	Poor harmonics can trigger utility penalties and stop regeneration being allowed.

Sources

FOTW #1360: A typical EV is 87%-91% efficient compared to 30% for a conventional gasoline vehicle US Department of Energy, Vehicle Technologies Office, 2024
Capturing wasted energy in our cities (Hesop reversible substations) (company press release) Alstom, 2025
ReGen drive (product brochure, UK) (vendor claims) Otis
Analysis of energy usage for RTG cranes (Papaioannou et al.), Energy 125, accepted manuscript Elsevier (repository copy, Manchester Metropolitan University), 2017
From fast lane to bus lane (GKN Gyrodrive order by Go-Ahead) Institution of Mechanical Engineers, 2014
CBAM definitive regime European Commission, DG Taxation and Customs Union, 2026
European carbon prices drop to 7-week low as market eyes upcoming policy agenda S&P Global Commodity Insights, 2026
Compliance obligations under India's Carbon Credit Trading Scheme enter into force for seven sectors International Carbon Action Partnership (ICAP), 2026
India kicks off carbon trading programme, but key polluters left out Business Standard, 2026
European carbon prices rose to EUR 88/t in October (citing ICE data) GMK Center, 2026
India's iron and steel sector moves closer to CCTS compliance: will larger decarbonisation follow? Down To Earth, 2026