FlexGen Power Systems

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - rate-limits
  - security
  generated: '2026-09-02'
  method: derived
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'