aid: flexgen-power-systems
name: FlexGen Power Systems
description: 'FlexGen Power Systems is a Durham, North Carolina energy storage technology company founded
  in 2009 that designs, integrates and operates grid-scale battery energy storage systems (BESS) and the
  software that runs them. Its flagship product is HybridOS, a hardware-agnostic energy management system
  (EMS) for multi-source, multi-site battery and solar portfolios, alongside HybridOS Control BMS (a
  US-built battery management system), a solar power plant controller (PPC), EMS retrofit, activation and
  lifecycle services, and data-center power solutions. FlexGen has been named a BloombergNEF Tier 1 energy
  storage company, acquired Clean Energy Services (CES) and the assets of Powin, and states that HybridOS
  exposes automated APIs and historian data API access to customers. No public developer portal, API
  reference or machine-readable specification is published; the HybridOS API surface is reached only
  through customer deployments and the login-gated FlexGen customer portal.'
url: https://raw.githubusercontent.com/api-evangelist/flexgen-power-systems/refs/heads/main/apis.yml
image: https://www.flexgen.com/themes/custom/flexgen/logo.svg
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.23'
created: '2026-08-16'
modified: '2026-08-16'
tags:
- Company
- Energy
- Energy Storage
- Battery Energy Storage
- Energy Management
- Grid
- Utilities
- Renewable Energy
- Industrial IoT
- SCADA
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.flexgen.com/
- type: Blog
  url: https://www.flexgen.com/resources/blog
- type: Support
  url: https://www.flexgen.com/contact-us
- type: GitHubOrganization
  url: https://github.com/flexgen-power
- type: PrivacyPolicy
  url: https://www.flexgen.com/privacy
- type: TrustCenter
  url: security/flexgen-power-systems-trust-center.yml
- type: Compliance
  url: conformance/flexgen-power-systems-conformance.yml
- type: Conformance
  url: conformance/flexgen-power-systems-conformance.yml
- type: DomainSecurity
  url: security/flexgen-power-systems-domain-security.yml
- type: Packages
  url: packages/flexgen-power-systems-packages.yml
- type: Plans
  url: plans/flexgen-power-systems-plans-pricing.yml
- type: RateLimits
  url: rate-limits/flexgen-power-systems-rate-limits.yml
- type: LLMsTxt
  url: llms/flexgen-power-systems-llms.txt
- type: SecondaryMarketListing
  url: https://forgeglobal.com/flexgen-power-systems_stock/
x-enrichment:
  date: '2026-08-16'
  status: minimal
  artifacts_added: 8
  pass: local-v1
x-coverage:
  state: gated
  reason: customer-only-docs
  detail: >-
    FlexGen markets "automated APIs" and "historian data API access" as HybridOS features but
    publishes no developer portal or reference anywhere on flexgen.com — api./docs./developer.
    subdomains do not resolve in DNS, and the only route to HybridOS documentation is the
    login-gated Noloco customer portal at portal.flexgen.com, which requires an active tenant.
  evidence:
  - url: https://www.flexgen.com/software/hybridos-energy-management-system
    status: 200
  - url: https://portal.flexgen.com/
    status: 200
  - url: https://www.flexgen.com/openapi.json
    status: 404
  - url: https://www.flexgen.com/llms.txt
    status: 404
  - url: https://www.flexgen.com/.well-known/api-catalog
    status: 404
  checked: '2026-08-16'