The EV Battery Demand Index – September 2021

Nov 2021

Our EV Battery Demand Index (below) draws on work from our EV Battery Chemistry Monthly Assessment. Each month this report analyses the latest in EV and battery market developments and provides our regular assessment of EV battery demand by battery chemistry and vehicle class.

Highlights from this month’s assessment include:

  • Farasis Energy announced the successful testing of Group14 Technologies SCC55 silicon carbon composite anode material. Based on SCC55 announcements, silicon content for this next generation of EV-grade battery cells is estimated at 10-20%.
  • Stellantis announced two new JVs, one with LG Energy Solution and one with Samsung SDI. Stellantis set out its plans at its EV Day in July to achieve a minimum of 260GWh of capacity globally by 2030, to include three plants in Europe and two plants in North America.
  • BEV & PHEV sales increased by 25% m-o-m in September. YTD battery deployment is now 119% above 2020 levels, compared to the increased y-o-y EV sales of 133%.

If you haven’t already subscribed to the EV Battery Chemistry Monthly Assessment, and would like to find out more, just get in touch with one of the team or request a demo.


ev battery demand index february 2021


Global ev battery demand for all vehicle classes increased 32% m-o-m in September 2021, to 31.6GWh, the highest month for EV battery demand to date. Average pack size increased this month to 48kWh, a result of strong sales in EU & EFTA & UK as well as a higher share of BEV sales against PHEV sales. BEV sales represented 74% of EV PC & LDV sales in September 2021, growing from around 65% earlier in the year.


Why do we track EV battery demand?

As EV and battery market analysts, we track EV sales across all vehicle classes, cathode and anode chemistry, and battery demand on a monthly basis. Our tracker is used for analysis on the implications for raw material demand, and for the deployment of battery packs so that our members and followers can better understand what is driving global EV battery demand.

Who benefits from understanding EV battery demand?

In order to form robust strategies and informed policies, battery manufacturers, OEMs, EV battery technology companies and policy makers need a solid grasp of what EV battery demand looks like from region to region, and from one time period to the next. Anyone operating within the EV supply chain, will benefit from understanding EV battery demand, what is driving it and how it affects the EV market as a whole.

As part of the work involved to produce our EV Battery Chemistry Monthly Assessment, we publish a monthly EV Battery demand Index, (the full archive can be seen on our membership platform), to offer our members and followers regular insights into EV battery demand. The EV Battery Demand Index is an assessment of aggregated monthly kWh battery demand for all vehicle classes, based on monthly vehicle sales and our model-by-model analysis of EV pack sizes and chemistry.

How do we track the EV and battery markets?

Our EV Battery Chemistry Monthly Assessment, and our EV & Battery Quarterly Outlook both contain in-depth analysis into EV battery demand, EV sales and all other key variables that shape the EV and battery markets.

The EV Battery Chemistry Assessment is a weighted average of vehicle battery chemistry across passenger car and light duty vehicle, bus and coach, and medium and heavy duty vehicle sectors. Electric vehicle sales data is collected on a model-by-model basis from automotive associations at country level for both BEV and PHEV vehicles for major markets. This analysis covers a minimum of 90% of total global market sales, and provides a balanced representation of markets with different vehicle characteristics, suppliers and seasonality. Our EV battery demand index is derived from this data. 

Our forecasts are based on robust and informed methodologies looking at the interactions between different functions in the supply chain. We track the following variables that impact the forecast: Legislation and incentives, OEM strategy, battery manufacturers’ capital investment and battery chemistry strategy, battery raw material pricing and costs, charging infrastructure investment, electric vehicle cost of ownership and consumer behaviour. For each vehicle model we collect data relating to battery pack size, battery chemistry, cell format, number of cells, and pack supplier in addition to a number of other vehicle metrics

How could our data help you?

Our insight and analysis on the EV market and battery technology advances, allow our clients to be fully up to date on latest developments, and will help inform the ways in which they react and respond to changing market dynamics. Businesses with an interest in the EV supply chain, from battery raw materials suppliers, battery manufacturers, OEMs, to charging infrastructure providers, will find it easier to form considered and forward-thinking strategies when equipped with Rho Motion data and analysis.

Rho Motion’s EV & Battery Market Reports 

To find out more about our EV & battery market reports, click on the links below or contact us on +44 (0) 203 960 9986. Alternatively complete the form below and we will be in touch.

EV & Battery Chemistry Monthly Assessment >>

EV & Battery Quarterly Outlook >>

EV & Battery Monthly Database >>

EV Motors Monthly Assessment >>

Hybrid EV & Battery Quarterly Outlook >>

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