---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-025903"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2025-05-15T23:59:59+00:00"
generated_at: "2026-05-21T05:32:26.576252+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "medium"
source: SEC EDGAR
---

# ESS Tech Q1 revenue $0.6M; awards 50 MWh Energy Base; proposals $400M; managing liquidity

## Summary
- Revenue of $0.6M for Q1 2025 from final Energy Center deliveries and Florida utility project.
- Awarded 50 MWh Energy Base project with Arizona utility; PPA structure with confirmed offtaker; contracting expected by September.
- Proposal submissions totaled ~1.2 GWh ($400M) over past two quarters; over 70% from Energy Base product.
- Interim CEO cites moderating H1 activity to manage liquidity; capital raising measures and turnaround pivot underway.
- Global fleet nearing 2.5 GWh transacted; two Portland General Electric systems cycling daily, transacting 158 MWh.

## SEC filing metadata
- accession: 0001628280-25-025903
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2025-05-15T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: medium
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000162828025025903/0001628280-25-025903-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000162828025025903/wk-20250515.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-025903
- JSON: https://secwatch.observer/filing/0001628280-25-025903.json
- Plain text: https://secwatch.observer/filing/0001628280-25-025903.txt

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