---
schema_version: "secwatch.filing_event.v1"
accession: "0001537435-24-000020"
form_type: "8-K"
ticker: "TGEN"
cik: "0001537435"
company_name: "TECOGEN INC."
filed_at: "2024-03-14T23:59:59+00:00"
generated_at: "2026-06-04T19:25:47.323841+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Tecogen Q4 2023 revenue $5.9M (+30% YoY); net loss $1.8M on $1M bad debt and inventory charges

## Summary
- Revenue $5.9M in Q4 (+30.2% YoY); Products $1.8M (+76.6%), Services $3.6M (+19.1%), Energy $542K (+4.7%).
- Net loss $1.8M vs $1.4M in Q4 2022; EPS loss $0.07. FY 2023 net loss $4.5M vs $2.4M.
- Adjusted EBITDA loss narrowed to $527K in Q4 from $1.1M YoY; FY loss $2.6M vs $1.7M.
- Gross margin dropped to 39.8% from 52.5% due to $1M bad debt reserve and obsolete inventory provision.
- CEO cites shift to larger multi-unit projects; 12-unit cogeneration order; factory move planned.

## SEC filing metadata
- accession: 0001537435-24-000020
- form_type: 8-K
- ticker: TGEN
- cik: 0001537435
- company_name: TECOGEN INC.
- filed_at: 2024-03-14T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1537435/000153743524000020/0001537435-24-000020-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1537435/000153743524000020/tgen-20240314.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001537435-24-000020
- JSON: https://secwatch.observer/filing/0001537435-24-000020.json
- Plain text: https://secwatch.observer/filing/0001537435-24-000020.txt

## Key facts
- Earnings Releases
  TECOGEN INC. reported for the year ended December 31, 2023 results: revenue $25.1 million, net income net loss of $4.5 million.
  - Period: for the year ended December 31, 2023
  - Revenue: $25.1 million
  - Net income: net loss of $4.5 million
  - Result: reported results
  source text: For the year ended December 31, 2023 revenues were $25.1 million and the net loss was $4.5 million
  evidence_url: https://www.sec.gov/Archives/edgar/data/1537435/000153743524000020/0001537435-24-000020-index.htm
- Earnings Releases
  TECOGEN INC. reported for the quarter ended December 31, 2023 results: revenue $5.9 million, net income net loss of $1.8 million, EPS a net loss of $0.07/share.
  - Period: for the quarter ended December 31, 2023
  - Revenue: $5.9 million
  - Net income: net loss of $1.8 million
  - EPS: a net loss of $0.07/share
  - Result: reported results
  source text: Tecogen Inc. (OTCQX:TGEN), a leading manufacturer of clean energy products, reported revenues of $5.9 million and a net loss of $1.8 million for the quarter ended December 31, 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/1537435/000153743524000020/0001537435-24-000020-index.htm

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