---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-015647"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2025-03-31T23:59:59+00:00"
generated_at: "2026-05-24T02:10:28.149475+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# ESS Tech reports FY2024 revenue of $6.3M, misses guidance; reaches Energy Center cost target early

## Summary
- FY2024 revenue of $6.3M was below the low end of guidance due to partner funding delays.
- Achieved breakeven profitability on latest Energy Center design in Q4, nearly a year ahead of schedule.
- Delivered eight Energy Center systems to a major Florida utility; commissioning expected later in 2025.
- Announced Energy Base, a new modular gigawatt-hour-scale LDES solution for grid-scale applications.
- Global fleet surpassed 2 GWh of transacted energy; received UL 9540 certification and MESA compliance.

## SEC filing metadata
- accession: 0001628280-25-015647
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2025-03-31T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000162828025015647/0001628280-25-015647-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000162828025015647/wk-20250331.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-015647
- JSON: https://secwatch.observer/filing/0001628280-25-015647.json
- Plain text: https://secwatch.observer/filing/0001628280-25-015647.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.