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Energy · head to head

Stem Athena vs Sunrun EnergyBase

Stem Athena logo

Stem Athena

Energy

AI-driven clean energy optimization

From
On request
Rated
-
Full reviewWebsite
Sunrun EnergyBase logo

Sunrun EnergyBase

Energy

Residential solar and energy management platform

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Stem Athena stem's site names the product PowerTrack Optimizer, formerly Athena, so the Athena name is retired; Sunrun EnergyBase no specific pricing published on website; mentions locked-in rates but does not disclose dollar amounts
  • They diverge on capability: Stem Athena covers AI optimization, Sunrun EnergyBase covers Solar design and simulation.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Stem Athena and Sunrun EnergyBase actually diverge.

Attributes where Stem Athena and Sunrun EnergyBase differ
AttributeStem AthenaSunrun EnergyBase
Pricing modelsubscriptionquote
PlatformsWeb, Mobile, ApiWeb, Mobile
Founded20092007

Identical on both: starting price (On request), free tier (No), user rating (Not yet rated), category (Energy).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Stem Athena

  • AI optimization
  • Energy storage management
  • Demand charge reduction
  • Grid services
  • Solar integration
  • Weather forecasting
  • Performance analytics
  • Remote monitoring

Only in Sunrun EnergyBase

  • Solar design and simulation
  • Project management
  • Real-time monitoring
  • Customer portal
  • Financial analysis
  • Salesforce
  • Google Maps
  • SSL encryption

Both cover

  • Data encryption
  • Cloud deployment

What people use each for

The jobs each tool is most often brought in to do.

Stem Athena

  • Energy asset optimization and managementnot Sunrun EnergyBase
  • Renewable energy integrationnot Sunrun EnergyBase
  • Energy storage managementnot Sunrun EnergyBase
  • Grid operations optimizationnot Sunrun EnergyBase

Sunrun EnergyBase

  • Residential solar salesnot Stem Athena
  • Energy managementnot Stem Athena

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Stem Athena

  • Stem's site names the product PowerTrack Optimizer, formerly Athena, so the Athena name is retired
  • No price, subscription fee or contract term is published anywhere on the site
  • The optimizer is one component of the wider PowerTrack suite alongside separate EMS, SCADA, Power Plant Controller and Logger products rather than a standalone licence
  • Design, procurement, commissioning and operation are sold as managed services separate from the software

Sunrun EnergyBase

  • No specific pricing published on website; mentions locked-in rates but does not disclose dollar amounts

Pricing, plan by plan

Stem Athena

On request
  • Commercial$undefined/custom
    • Energy storage optimization
    • Demand charge management
    • Rate optimization
  • Utility$undefined/custom
    • Grid services
    • VPP management
    • Frequency regulation
  • Enterprise$undefined/custom
    • Fleet management
    • Portfolio optimization
    • Custom integrations

Sunrun EnergyBase

On request

No published plan breakdown. See the Sunrun EnergyBase review.

Which should you pick?

Choose Stem Athena if

  • You need ai optimization.
  • You work on Web, Mobile, Api.
  • You also want energy storage management.
Stem Athena review

Choose Sunrun EnergyBase if

  • You need solar design and simulation.
  • You work on Web, Mobile.
  • You also want project management.
Sunrun EnergyBase review

Questions people ask

Is Stem Athena or Sunrun EnergyBase better?
Neither clearly leads. Stem Athena starts at On request and Sunrun EnergyBase at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Stem Athena or Sunrun EnergyBase?
Stem Athena starts at On request and Sunrun EnergyBase at On request.
Does Stem Athena or Sunrun EnergyBase run on more platforms?
Stem Athena runs on Web, Mobile, Api. Sunrun EnergyBase runs on Web, Mobile.
What is Stem Athena best used for?
Stem Athena is most often used for energy asset optimization and management, renewable energy integration, energy storage management, grid operations optimization. Of those, energy asset optimization and management and renewable energy integration are not what Sunrun EnergyBase is typically brought in for.
What can Stem Athena do that Sunrun EnergyBase cannot?
Stem Athena covers AI optimization, Energy storage management, Demand charge reduction, Grid services. Sunrun EnergyBase covers Solar design and simulation, Project management, Real-time monitoring, Customer portal. Both handle Data encryption, Cloud deployment.

Answered from the vendors’ own pages

Stem Athena: How much does Stem Athena cost?

Stem does not publish pricing for Athena on its website. The company appears to use a custom enterprise pricing model. Interested customers must contact Stem directly through their website to inquire about pricing and availability.

Source
Sunrun EnergyBase: How much does Sunrun EnergyBase cost?

Sunrun does not publish specific pricing for EnergyBase on its website. The company mentions predictable monthly payments with locked-in rates and add-on battery options available for as little as $0 down, but exact costs are not disclosed.

Source
Stem Athena: Does Stem offer a free trial?

The Stem website does not mention a free trial or demo option for Athena. Customers are directed to contact Stem's sales team for information about trial access or pricing.

Source
Sunrun EnergyBase: How can I get a Sunrun EnergyBase price quote?

To obtain pricing details, interested customers must use the quote request form or contact a Sunrun solar advisor directly through the website.

Source
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