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Table 3 A summary of the key events driving urban transition trajectories in Foshan, Wuxi, and Rizhao

From: Spatiotemporal perspectives on urban energy transitions: a comparative study of three cities in China

Cities

Phases

Key events

Outcome

Foshan

Breakthrough

• Sanshui Industrial Park was designated as a national demonstration zone for distributed solar PV in 2013

• Introduction of the national solar FIT and the Guangdong Solar PV Power Generational Development Plan in 2014

• The municipal government introduced a FIT of RMB 0.15/kWh and a direct subsidy (RMB 1/W) on installed capacity

• Village committees piloted solar projects in urban villages

• Market agents developed new business models for solar products and services

• Emergence of new business models

• Emergence of a niche market

• Cost gap narrowed due to subsidies

• Initial public interest

Acceleration

• The number of installed solar PV went from less than a dozen in 2015 to 763 by the end of 2016

• Payback periods were reduced from 15 to 8 years in the period from 2015 to 2016

• The proliferation of new business models

• Grid companies and their local subsidiaries in Foshan provided enhanced services to connect PV systems to the grid

• Market expanding, but remains a minor share

• Technologies approaching cost-competitiveness

• Diverse and rapid growth of business models

• Increasing acceptance by utilities and communities

Wuxi

Breakthrough

• In 2001, Sun-tech was founded with the support of local government.

• A solar power industry cluster started to form.

• Emergence of business models

• Initial public interest

Acceleration

• In 2007, the blue algae outbreak in Taihu Lake posed an environmental and public health crisis that reverberated throughout the city and triggered political support for the development of clean energy.

• In 2008, the municipal government required the mandatory installation of SWHs in all new housing buildings under 12 floors

• Wuxi Taihu New Town was designated as a ‘national demonstration zone of low-carbon eco-cities’ in 2009

• From 2010, Wuxi implemented a ‘4610’ plan (four policies to accelerate 6 technologies in 10 demonstration projects)

• Market expansion due to policy support, but remains a minor share

• Increasing public interest

Stabilization

• The total solar power generation reached 90 MW in 2015

• By the year 2016, over 100 core solar enterprises had clustered in Wuxi

• In 2016, the roof area with installed SWHs and distributive PV stations in Taihu was over 1.6 km2

• Mass market exists

• The supply chain is well established

• Consolidation of the industry structure

• Increasing interest in ‘greener’ lifestyles

Rizhao

Predevelopment

• The emergence of sporadic grassroots experiments in early 1980s due to social needs

• Costs remain high due to lack of economies of scale

• Initial expert interests

Take-off

• The technology to produce SWHs with evacuated glass tubes was developed in 1984

• Technology is feasible but high-cost gap remains

• Growing expert interest in technology

Breakthrough &

Acceleration

• In the early 1990s, subsidies were provided to local solar firms

• Leading enterprises started to produce complete machines of water-in-glass evacuated tube SWHs at a large scale in late 1990s

• Emergence of new business models and companies

• Technologies are progressively approaching cost-competitiveness

• Rapid pace of cost reduction due to market expansion and penetration

• Increasing acceptance by utilities and communities

Stabilization

• Till the early 2000s, more than 70% of the urban households using water-in-glass evacuated tube SWHs

• The introduction of the mandatory installation of SWHs in 2007

• The extension of the mandatory installation of SWHs to high-rise buildings in 2010

• Technology is mature

• Mass market exists

• Cost-effective due to economies of scale

• Widespread acceptance by communities

• Technology becomes a part of people’s daily lives