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Axion subscriptions
Subscribe to engineering automation software for power project delivery.
Choose PowerTwin, SolarTwin, BessTwin, or WindTwin for AI-assisted engineering automation across PV, BESS, wind, substation, gen-tie, transmission, QA/QC, and deliverable workflows.
Transparent public pricing. Secure Stripe Checkout. Manual invoicing available for procurement workflows. Final engineering responsibility remains with qualified professionals.
Manual invoice option
PO, ACH, wire, vendor onboarding, and procurement workflows.
Automated license setup
Guided setup email from your inbox for assigning users after checkout.
Engineering Savings
Customers on average save 40% on engineering costs, including an enterprise subscription cost.
Savings are average target outcomes for suitable repeatable workflows and depend on scope, data quality, discipline mix, review process, adoption, and project delivery model.
Transparent pricing
Public pricing for long-term engineering partnerships.
Axion publishes subscription pricing so engineering teams, procurement groups, and decision-makers can evaluate cost clearly before checkout.
We are transparent about pricing because we are transparent about the workflows we support: repeated engineering administration, QA/QC, design-basis control, deliverable readiness, and human-in-the-loop review.
Every public subscription can be started through Stripe Checkout. If your company prefers procurement review, ACH, wire, purchase order, or invoice processing, use the manual invoice option and Axion will complete the subscription through a procurement-friendly workflow.
Billing
Choose annual or monthly billing.
Annual subscriptions are recommended for teams planning recurring engineering workflow use. Monthly subscriptions are available when flexibility is more important than annual subscription savings.
Recommended
PowerTwin
Full multi-asset engineering automation platform for hybrid power projects.
$24,000
per seat / year
$2,000 monthly equivalent. Annual Subscription Savings: $3,600/year.
$2,300
per seat / month
Flexible month-to-month subscription.
- PV, BESS, wind, and hybrid workflow support
- Substation, gen-tie, and transmission coordination
- Design-basis and assumption tracking
- QA/QC issue logs and deliverable readiness
- Human review checkpoints
PV automation
SolarTwin
Dedicated PV and solar engineering automation suite.
$12,000
per seat / year
$1,000 monthly equivalent. Annual Subscription Savings: $1,800/year.
$1,150
per seat / month
Flexible month-to-month subscription.
- PV-specific workflow automation
- Layout generation and shading analysis
- Design-basis and assumption tracking
- QA/QC issue logs and deliverable readiness
BESS automation
BessTwin
Dedicated battery storage engineering automation suite.
$12,000
per seat / year
$1,000 monthly equivalent. Annual Subscription Savings: $1,800/year.
$1,150
per seat / month
Flexible month-to-month subscription.
- BESS-specific workflow automation
- Layout generation and spacing analysis
- Design-basis and assumption tracking
- QA/QC issue logs and deliverable readiness
Wind automation
WindTwin
Dedicated wind engineering automation suite.
$12,000
per seat / year
$1,000 monthly equivalent. Annual Subscription Savings: $1,800/year.
$1,150
per seat / month
Flexible month-to-month subscription.
- Wind-specific workflow automation
- Turbine siting and spacing analysis
- Design-basis and assumption tracking
- QA/QC issue logs and deliverable readiness
Comparison
Compare Axion subscription plans.
Compare public single-seat pricing for Axion engineering automation suites. Annual subscriptions provide the best value, while monthly subscriptions offer flexibility.
| Suite | Best for | Annual subscription | Monthly subscription | Annual Subscription Savings | Checkout |
|---|---|---|---|---|---|
| PowerTwin Recommended | Hybrid / full platform | $24,000/ yr | $2,300/ mo | $3,600/ yr |
|
| SolarTwin PV automation | PV / solar workflows | $12,000/ yr | $1,150/ mo | $1,800/ yr |
|
| BessTwin BESS automation | Battery storage workflows | $12,000/ yr | $1,150/ mo | $1,800/ yr |
|
| WindTwin Wind automation | Wind workflows | $12,000/ yr | $1,150/ mo | $1,800/ yr |
|
Team packs
Annual team packs for small engineering teams.
Annual team packs provide discounted multi-seat access for small teams. All team packs can be purchased online through Stripe when configured, and manual invoicing is available for companies that prefer purchase orders, ACH, wire, or procurement review.
Recommended
PowerTwin
team packs
2 seats
$45,600 / yr
3 seats
$68,400 / yr
4+ seats requires PowerTwin Enterprise.
PV Automation
SolarTwin
team packs
2 seats
$22,800 / yr
3 seats
$34,200 / yr
5 seats
$54,000 / yr
BESS Automation
BessTwin
team packs
2 seats
$22,800 / yr
3 seats
$34,200 / yr
5 seats
$54,000 / yr
Wind Automation
WindTwin
team packs
2 seats
$22,800 / yr
3 seats
$34,200 / yr
5 seats
$54,000 / yr
Enterprise
Enterprise subscriptions with public pricing.
Enterprise pricing is published publicly. Enterprise subscriptions can be started through Stripe Checkout when configured, and the same subscriptions can be completed through manual invoice workflows for organizations that require procurement review.
Unlimited Users
PowerTwin
Enterprise
Unlimited users for full platform and hybrid engineering projects.
$74,500 / year
Unlimited Users
SolarTwin
Enterprise
Unlimited PV and solar engineering users.
$60,000 / year
Unlimited Users
BessTwin
Enterprise
Unlimited BESS and battery engineering users.
$60,000 / year
Unlimited Users
WindTwin
Enterprise
Unlimited wind and turbine engineering users.
$60,000 / year
Procurement
Prefer a manual invoice, purchase order, ACH, or wire transfer?
Every Axion subscription can be completed through Stripe Checkout or through a procurement-friendly manual invoice workflow. If your organization requires vendor onboarding, purchase order approval, ACH, wire transfer, tax documentation, or internal procurement review, submit a manual invoice request and Axion will coordinate the subscription with your billing contact.
Stripe
Secure Stripe billing for subscriptions and invoices.
Online payment methods
Stripe Checkout can present eligible online methods such as cards, US bank account / ACH Direct Debit, Link, Apple Pay, and Google Pay depending on customer eligibility, currency, and Stripe Dashboard configuration.
Procurement-friendly invoices
Manual invoices are available for teams that need purchase orders, ACH, wire, tax documentation, vendor onboarding, or procurement review.
Receipts, retries, and billing portal
Stripe supports receipts, invoices, failed-payment recovery, saved payment methods, and subscription management through the Customer Portal.
Manage an existing subscription
Use the Stripe Customer Portal to update payment methods, view invoices, and manage billing details.
After checkout
License setup is completed through a guided email workflow.
After checkout, Axion sends the purchaser a guided setup email with a secure link to assign license users, provide onboarding details, and complete setup for the selected Axion suite. Single-seat subscriptions can assign one license user. Multi-seat subscriptions can assign one user email per purchased seat. Enterprise subscriptions can provide the administrator contact and company domain for onboarding.
This keeps checkout simple while giving each customer a clear, auditable path to configure licenses and begin using the appropriate Axion suite.
1. Receive setup email
The purchaser receives a secure setup link for the selected subscription.
2. Assign users
Single-seat and multi-seat customers assign the user email for each purchased license.
3. Complete onboarding
Axion supports license activation, customer portal access, and enterprise-domain coordination.
Subscription FAQ
Subscription FAQ.
What is included in a PowerTwin subscription?
PowerTwin includes full multi-asset workflow automation for PV, BESS, wind, and hybrid projects, with support for substation coordination, gen-tie and transmission context, engineering QA/QC and deliverable automation logs, design-basis tracking, and deliverable readiness.
Which Axion subscription should I choose?
Choose PowerTwin for hybrid or multi-asset projects. Choose SolarTwin, BessTwin, or WindTwin if your team is focused on a single asset class. Enterprise plans are best for organizations that need unlimited users and broader procurement or onboarding support.
Can I subscribe to Enterprise through Stripe?
Yes. Enterprise subscription pricing is public and Enterprise subscriptions can be purchased through Stripe Checkout when the corresponding Stripe plan is configured. Manual invoicing is also available for organizations that prefer procurement review, purchase orders, ACH, or wire transfer.
Can I request a manual invoice instead of paying by card?
Yes. Every Axion subscription can be completed through manual invoicing if your organization requires purchase order approval, procurement review, ACH, wire transfer, or vendor onboarding.
Why does Axion publish pricing online?
Axion publishes pricing because transparency builds better long-term partnerships. Engineering teams and procurement groups should be able to evaluate cost before committing to a workflow conversation or subscription.
What does Annual Subscription Savings mean?
Annual Subscription Savings compares the annual subscription cost against twelve months of the monthly no-commitment plan. Annual subscriptions avoid the monthly flexibility premium and provide the best value for teams planning recurring use.
Can I pay monthly instead of annually?
Yes. Monthly no-commitment plans are available for single-seat subscriptions. Annual subscriptions provide the best value for teams that expect ongoing use.
Can I use a Stripe promotion code or coupon?
Yes. Eligible promotion codes can be entered securely during Stripe Checkout when promotion codes are enabled for the plan.
How do annual team packs work?
Annual team packs provide multiple seats at reduced annual pricing for smaller teams. If a team pack is not yet configured for Stripe Checkout, the subscription can be completed through manual invoicing.
How does license setup work after checkout?
After checkout, Axion sends the purchaser a setup email with a secure link to assign license users and complete onboarding information. Single-seat subscriptions can assign one license user. Multi-seat subscriptions can assign one user email per purchased seat. Enterprise subscriptions can provide the administrator contact and company domain for onboarding.
Can I manage my subscription after checkout?
Yes. Customers can use the Stripe Customer Portal to update payment methods, view invoices, and manage billing details when the portal is enabled for their subscription.
Does a subscription replace licensed engineering review?
No. Axion provides human-in-the-loop engineering automation software. Final engineering responsibility, approvals, permitting, code interpretation, and sealed deliverables remain with qualified professionals and applicable project authorities.
Axion subscription pricing summary.
PowerTwin annual single-seat pricing is $24,000 per year or $2,300 month-to-month. Annual Subscription Savings are $3,600 per year compared with twelve monthly payments.
SolarTwin annual single-seat pricing is $12,000 per year or $1,150 month-to-month. Annual Subscription Savings are $1,800 per year compared with twelve monthly payments.
BessTwin annual single-seat pricing is $12,000 per year or $1,150 month-to-month. Annual Subscription Savings are $1,800 per year compared with twelve monthly payments.
WindTwin annual single-seat pricing is $12,000 per year or $1,150 month-to-month. Annual Subscription Savings are $1,800 per year compared with twelve monthly payments.
PowerTwin Enterprise is $74,500 per year. SolarTwin Enterprise, BessTwin Enterprise, and WindTwin Enterprise are each $60,000 per year.
Axion publishes transparent subscription pricing. Public subscriptions can be started through Stripe Checkout, and manual invoicing is available for organizations that prefer procurement review, purchase orders, ACH, or wire transfer.
Axion subscription payment options.
Axion subscriptions can be started online through Stripe Checkout using eligible payment methods such as card payments, US bank account / ACH Direct Debit, and eligible wallet options.
Manual invoice subscriptions are available for purchase orders, ACH, wire transfer, vendor onboarding, tax documentation, and procurement review.
License onboarding is completed through a guided setup email after checkout when the subscription is ready for onboarding.