China’s residential energy storage production base has taken shape as a structure centered on East China, with South China serving as an export hub and Central and Western China providing supplementary capacity, primarily concentrated in the Yangtze River Delta, the Pearl River Delta, and new energy industry hubs such as Hefei.

1. East China Region (Highest concentration of production capacity, accounting for over 60%)

1. Jiangsu — Primarily focused on inverters and system integration

Suzhou (Kunshan): Home to GoodWe’s headquarters and core manufacturing base, specializing in residential inverters and energy storage systems.

Yangzhou/Yizheng: Headquarters and largest production base of ZTE Power, the domestic leader in residential energy storage batteries.

Changzhou: Trina Energy Storage headquarters, CATL’s Liyang base (supplying energy storage cells), and production capacity from Zhongxin Innovation.

Nantong: Sige New Energy’s Gigafactory (scheduled to begin production in 2026), with an annual production capacity exceeding 300,000 residential energy storage and inverter units.

Nanjing: Home to several energy storage system integration companies.

2. Zhejiang — Complete Unit Manufacturing and Export Support

Ningbo: Deye Co., Ltd.’s headquarters and production base are located in Beilun District, specializing in residential inverter-storage integrated units; Additionally, there is a supporting PV-storage industrial chain.

Hangzhou: Headquarters of Hema Co., Ltd. (micro-inverters + energy storage integration).

Jiaxing: Headquarters of Yingli Technology, specializing in module-level power electronics and residential storage.

Yiwu: Surrounded by a dense cluster of supporting SMEs, primarily focused on the assembly of export-oriented residential storage systems.

3. Anhui — A Hub for Integrated PV-Storage Solutions

Hefei: Headquarters of Sungrow (located on Boyanwan Road in the High-Tech Zone, etc.), with a focus on residential storage system integration; supported by battery cell manufacturers such as Guoxuan High-Tech. Currently accelerating the construction of a 10-billion-yuan-scale PV-storage industrial base.

Ma‘anshan: New bases, including Ruiyun Technology, are under construction.

Chuzhou: A cluster of supply chain companies supporting CATL.

2. South China (Export-Oriented Manufacturing Hub)

1. Shenzhen, Dongguan, and Huizhou, Guangdong

Shenzhen: Home to the headquarters of BYD’s energy storage business, as well as companies such as Sunwoda, KSTAR, and Invac (temperature control solutions), serves as the primary export hub for residential energy storage products. It also houses R&D and manufacturing centers for brands like EP CUBE.

Dongguan: Battery cell and system manufacturers such as Chuangming Battery and Xinrui Energy, leveraging the local lithium-ion battery supply chain infrastructure.

Huizhou: A major production hub for energy storage battery cells, home to companies like EVE Energy and BYD.

2. Xiamen, Fujian

Headquarters of Kehua Data/Kehua Energy, with a focus on residential and commercial/industrial energy storage inverters and systems.

3. Southwest Region (Resource-Driven, Accelerated Expansion)

Chongqing: The Ruihe Energy Storage Base in the Western (Chongqing) Science City (scheduled to begin production by the end of 2023) focuses on “Made in Chongqing” residential and commercial energy storage systems.

Chengdu/Yibin, Sichuan: Leveraging upstream lithium battery resources (such as Tianqi Lithium), the CATL Yibin Base and Zhongchuan New Energy have established energy storage cell production lines. However, there is limited local assembly of residential systems; most operations follow a cross-regional collaboration model of “cells → systems.”

4. Central China and Other Regions (Industrial Relocation and Supporting Industries)

Zhengzhou, Henan: Several energy storage system integration projects have been implemented, supporting the relocation of industries from central China.

Baoding, Hebei: The Large-Scale Energy Storage Consortium (including Keliyuan) has established energy storage integration production lines, partially covering residential energy storage applications.

5. Wenzhou Region (Southern Zhejiang Residential Energy Storage Manufacturing Hub)

Wenzhou serves as a key hub for Zhejiang’s residential energy storage industry, but large-scale dedicated residential energy storage equipment manufacturing bases are relatively concentrated in the following areas:

1. Longwan District / Wenzhou High-Tech Zone

Maidian Energy Co., Ltd.: Home to the company’s manufacturing and R&D headquarters, this locally grown leader in Wenzhou’s residential energy storage sector specializes in residential energy storage batteries, inverters, and “home power station” products. With an annual production capacity of one million kilowatts, it is Wenzhou’s most representative manufacturing base for residential energy storage equipment.

2. Tian’aoyu, Ni’yu Subdistrict, Dongtou District

Yunda Co., Ltd. (Wenzhou) Smart Energy Storage Production Base (commencing operations in January 2024): Although primarily focused on grid-scale and commercial/industrial energy storage, it possesses battery integration capabilities, and some production lines can be adapted for residential systems.

3. Ouhai District

Companies such as Wenzhou Changsheng New Energy Co., Ltd. are engaged in the production of residential lithium-ion batteries and inverters, primarily through small- to medium-scale manufacturing or assembly operations.

Note: Most of the large-scale energy storage bases currently publicly disclosed in Wenzhou are grid-side or commercial and industrial projects (such as the Meiyu Energy Storage Project). The core large-scale base dedicated to the manufacturing of complete residential energy storage systems is Maitian Energy in Longwan; other companies mostly adopt a “R&D and sales + contract manufacturing” model or a segmented production model.

6. Key Characteristics of the Industry Landscape

“Battery Cell + System” Separate Layout: Battery cells for residential energy storage primarily come from leading manufacturers such as CATL (Ningde/Yibin/ Liyang), BYD (Shenzhen/Huizhou), EVE Energy (Huizhou/Jingmen), and Gotion High-Tech (Hefei/Qingdao); whereas residential energy storage system integration (including inverters, BMS, and cabinet assembly) is concentrated in the Yangtze River Delta (Jiangsu, Zhejiang, and Anhui), the Pearl River Delta, and the Hefei smart equipment cluster.

Few dedicated “residential energy storage” bases exist: Most bases are integrated solar-storage facilities or composite industrial parks producing both commercial/industrial and residential products on the same production lines.

Export-oriented focus is evident: Enterprises in East China (Ningbo, Suzhou, Hangzhou, Wenzhou) and South China (Shenzhen, Dongguan) account for the vast majority of global residential energy storage exports.

Summary: China’s residential energy storage hubs are led by a first-tier group comprising Suzhou/Yizheng/Changzhou in Jiangsu, Ningbo/Wenzhou/Jiaxing in Zhejiang, Hefei in Anhui, Shenzhen/Dongguan in Guangdong, and Xiamen in Fujian; Wenzhou, through companies such as Maitian Energy, has established the largest residential energy storage system manufacturing center in southern Zhejiang in Longwan.