ESS TechGWHWW 35 Days Inventory is 1.67 as of Mar. 2026, which is 95% below its 10-year median of 36.06. GuruFocus rates GWHWW with a GF Score™ of 35/100. The stock has 5 warning signs investors should review. Among 2,967 Industrial Products companies, ESS Tech ranks better than 90.66% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). ESS Tech's Average Total Inventories for the
three
months ended in Mar. 2026 was $0.13 Mil. ESS Tech's Cost of Goods Sold for the
three
months ended in Mar. 2026 was $7.17 Mil.
Hence, ESS Tech's Days Inventory for the
three
months ended in Mar. 2026 was 1.67.
The historical rank and industry rank for ESS Tech's Days Inventory or its related term are showing as below:
GWHWW'
s Days Inventory Range Over the Past 10 Years
Min: 31.82 Med: 36.06 Max: 59.95
Current: 43.45
During the past 6 years, ESS Tech's highest Days Inventory was 59.95. The lowest was 31.82. And the median was 36.06.
GWHWW's Days Inventory is ranked better than 90.66% of 2967
companies
in the Industrial Products industry
Industry Median: 119.47
vs GWHWW: 43.45
ESS Tech's Days Inventory
declined
from Mar. 2025 (65.34) to Mar. 2026 (1.67).
Warning Sign:
If a company builds up inventory, it may mean it is having difficulties selling its goods.
Inventory Turnover measures how fast the company turns over its inventory within a year.
ESS Tech's Inventory Turnover for the
three
months ended in Mar. 2026 was 54.49.
Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
ESS Tech's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 1.03.
ESS Tech (OTCPK:GWHWW) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
ESS Tech's Inventory Turnover for the
three
months ended in Mar. 2026 is calculated as
2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
ESS Tech's Inventory to Revenue for the
three
months ended in Mar. 2026 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
ESS Tech Days Inventory Related Terms
ESS Tech Days Inventory Historical Data
* Premium members only.
The historical data trend for ESS Tech's Days Inventory can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
GWHWW vs DFLI, EPOW, SDST: Days Inventory Comparison
For the Electrical Equipment & Parts subindustry, ESS Tech's Days Inventory, along with its competitors' market caps and Days Inventory data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
ESS Tech Days Inventory vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, ESS Tech's Days Inventory distribution charts can be found below:
* The bar in red indicates where ESS Tech's Days Inventory falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
ESS Tech (GWHWW) has a Days Inventory of 1.67 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on ESS Tech and its competitors. This is 95% below median its historical median of 36.06. Over the past decade, ESS Tech's Days Inventory has ranged from 31.82 to 59.95. According to the industry distribution chart, ESS Tech ranks #277 out of 2967 companies in the Industrial Products industry, placing it in the top 9.3%.
Is ESS Tech's Days Inventory too high?
ESS Tech's current Days Inventory of 1.67 is 95% below median its 10-year median of 36.06. Over the past 10 years, this metric has ranged from a low of 31.82 to a high of 59.95. The Industrial Products industry median Days Inventory is 119.47. ESS Tech's value of 1.67 is 98.6% below this industry median. Based on the distribution chart, ESS Tech ranks #277 out of 2967 companies in the Industrial Products industry, which is in the top quartile — a strong position relative to peers. Overall, ESS Tech has a GF Score™ of 35/100, reflecting its overall financial health beyond just this single metric.
How does ESS Tech's Days Inventory compare to DFLI and EPOW?
According to the Industrial Products industry distribution chart, ESS Tech ranks #277 out of 2967 companies for Days Inventory. This places ESS Tech in the top 9% of its industry — outperforming the majority of peers. The industry median Days Inventory is 119.47. ESS Tech's value of 1.67 is 98.6% below this benchmark. Historically, ESS Tech's own Days Inventory has ranged from 31.82 to 59.95 over the past decade. While the company's 10-year median is 36.06 vs. the industry median of 119.47, ESS Tech has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Days Inventory for an Industrial Products company?
The median Days Inventory among Industrial Products companies is 119.47, based on 2,967 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. ESS Tech's current Days Inventory of 1.67 is 98.6% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on ESS Tech and its competitors. For the Industrial Products industry, the median Days Inventory is 119.47 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. ESS Tech's current Days Inventory is 1.67, which is 95% below median its own 10-year median of 36.06. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is ESS Tech stock overvalued right now?
ESS Tech (GWHWW) has a current Days Inventory of 1.67. The current Days Inventory is 1.67, which is 95% below median its 10-year median of 36.06 and 98.6% below the Industrial Products industry median of 119.47. ESS Tech's overall GF Score™ is 35/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For ESS Tech (GWHWW), the current Days Inventory is 1.67 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
ESS Tech Inc is a long-duration energy storage company specializing in iron flow battery technology. It develops and manufactures long-duration energy storage systems based on iron flow battery technology. The company's batteries use earth-abundant materials, including iron, salt, and water, and are designed for high cycle life and recyclability. It operates as a single business operating segment, which includes all activities related to the design, engineering, and manufacturing of the company's long duration energy storage products. The company's revenue is derived from the sale of its energy storage products and from service contracts.
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