FlexGen Power Systems

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.

FlexGen Power Systems is profiled on the APIs.io network. Tagged areas include Company, Energy, Energy Storage, Battery Energy Storage, and Energy Management.

FlexGen Power Systems’ developer surface includes engineering blog, support, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub
16.4/100 emerging Agent 3/100 human only Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
0 APIs
CompanyEnergyEnergy StorageBattery Energy StorageEnergy ManagementGridUtilitiesRenewable EnergyIndustrial IoTSCADA

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 16.4/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 1.1 / 17
Commercial Clarity 4.5 / 17
Operational Transparency 0.6 / 11
Governance 1.3 / 10
Discoverability 4.9 / 9
Regulatory Posture 4.1 / 15
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Regulatory Posture applies to this provider. Its tags matched the Energy & Utilities regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/flexgen-power-systems: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Pricing Plans 1

Published pricing tiers and plan structures.

Flexgen Power Systems Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Flexgen Power Systems Rate Limits

0 limits

RATE LIMITS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Flexgen Power Systems Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Flexgen Power Systems Trust Center

ISO 9001:2015

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages

Access & Security 3

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 Compliance
Compliance
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy
 Plans
Plans

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

SecondaryMarketListing
SecondaryMarketListing

Source (apis.yml)

apis.yml Raw ↑ 
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: '0.20'
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'