AC block
| Other names | AC block container Alternating current block |
|---|---|
| Type | Energy storage device |
| Industry | Energy storage |
| Inception | 2022[1] |
| Definition | Integration of battery racks and string PCS into one container[2] |
An AC block, whose full name is alternating current block,[3] also known as AC block container,[4] is a container that integrates power conversion systems (PCSs) with batteries.[5] First introduced in 2022,[6] these devices are mainly used in the energy storage industry. AC block products are mainly composed of PCSs, thermal management and other components, as well as cabling.[7] It is seen as an alternative to the DC block container.[8]
Currently, the number of companies that manufacture AC blocks is limited.[6] The main manufacturers of such products include Sungrow,[9] NV Energy,[10] Fluence,[11] and Wärtsilä.[12] Although this product type was not introduced until 2022, this emerging product design is gaining increasing popularity in the battery energy storage industry.[13]
Compared to DC block containers
[edit | edit source]Compared to DC block containers, AC block containers reduce space requirements,[14] providing better reliability,[15] and easier installation.[16] However, in the short term, AC ones will come at a cost premium. In the long run, the advantages of AC block products may drive down the overall system costs.[6]
History
[edit | edit source]The first AC block product was launched in 2022.[17] In October 2023, another product in the same category was made available by Sungrow. In 2024, Wärtsilä released an AC block BESS called Quantum 3.[18]
In early 2025, Sungrow introduced the "AC block based on triple-E integration" concept,[19] where "triple-E" refers to power electronics, electrochemistry, and electrical grids. In June, the company rolled out the PowerTitan 3.0,[20] which was built upon this specific concept.[19]
Manufacturers
[edit | edit source]According to a research report published by S&P Global Commodity Insights, as of November 2023, the manufacturers that produce AC blocks were very limited.[6] Sungrow Power Supply and Rimac Energy were included in this report.[6]
References
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