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Energy · head to head

HOMER Energy vs Wattwatchers EMS

HOMER Energy logo

HOMER Energy

Energy

Microgrid and distributed energy optimization software

From
$187.5/month
Rated
-
Full reviewWebsite
Wattwatchers EMS logo

Wattwatchers EMS

Energy

Smart building energy management system

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: HOMER Energy now owned by UL Solutions rather than being independent; Wattwatchers EMS requires hardware installation at each monitoring point, increasing total cost of ownership
  • They diverge on capability: HOMER Energy covers Microgrid optimization, Wattwatchers EMS covers Real-time monitoring.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which HOMER Energy and Wattwatchers EMS actually diverge.

Attributes where HOMER Energy and Wattwatchers EMS differ
AttributeHOMER EnergyWattwatchers EMS
Starting price$187.5/monthOn request
Pricing modelsubscriptionUnknown
PlatformsWindows, WebWeb, iOS, Android, Cloud
Founded20092007

Identical on both: 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 HOMER Energy

  • Microgrid optimization
  • Techno-economic analysis
  • Component library
  • Sensitivity analysis
  • Energy storage sizing
  • Renewable integration
  • Load profile analysis
  • Financial modeling

Only in Wattwatchers EMS

  • Real-time monitoring
  • Energy analytics
  • Smart recommendations
  • Alert system
  • Mobile app
  • Home Assistant
  • Google Home
  • SSL encryption

Both cover

  • Cloud deployment
  • Web support
  • English language support

What people use each for

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

HOMER Energy

  • Sizing and optimising off-grid and microgrid systemsnot Wattwatchers EMS
  • Modelling the economics of solar, wind and battery combinationsnot Wattwatchers EMS
  • Electric bill optimisation for grid-connected sites and EV chargingnot Wattwatchers EMS
  • Utility-scale storage investment analysisnot Wattwatchers EMS
  • Comparing least-cost configurations against load and resource datanot Wattwatchers EMS

Wattwatchers EMS

  • Energy optimizationnot HOMER Energy
  • Cost reductionnot HOMER Energy

Where each one falls short

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

HOMER Energy

  • Now owned by UL Solutions rather than being independent
  • Split into three separate products, HOMER Pro for off-grid and microgrids, HOMER Grid for bill optimisation and HOMER Front for utility-scale, so the right one depends on project type
  • Pricing is not shown on the product pages

Wattwatchers EMS

  • Requires hardware installation at each monitoring point, increasing total cost of ownership
  • Built for small to medium portfolios; scaling to large portfolios may present usability challenges
  • Limited to energy monitoring; not a comprehensive building management system

Pricing, plan by plan

HOMER Energy

$187.5/month
  • Base$187.5/month
    • No modules included; add individually
    • Basic support
    • Software updates
  • Professional$373.5/month
    • Any 4 modules included (Biomass Generation, Run of River Hydro, Advanced Grid, Advanced Load, etc.)
    • Basic support
    • Software updates
  • Expert$568.5/month
    • All modules included: Biomass, Hydro, Hydrogen, Advanced Grid/Load/Storage, Combined Heat & Power, Multi-Year, MATLAB Link
    • Basic support
    • Software updates

Wattwatchers EMS

On request

No published plan breakdown. See the Wattwatchers EMS review.

Which should you pick?

Choose HOMER Energy if

  • You need microgrid optimization.
  • You work on Windows, Web.
  • You also want techno-economic analysis.
HOMER Energy review

Choose Wattwatchers EMS if

  • You need real-time monitoring.
  • You work on Web, iOS, Android, Cloud.
  • You also want energy analytics.
Wattwatchers EMS review

Questions people ask

Is HOMER Energy or Wattwatchers EMS better?
Neither clearly leads. HOMER Energy starts at $187.5/month and Wattwatchers EMS at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, HOMER Energy or Wattwatchers EMS?
HOMER Energy starts at $187.5/month and Wattwatchers EMS at On request.
Does HOMER Energy or Wattwatchers EMS run on more platforms?
HOMER Energy runs on Windows, Web. Wattwatchers EMS runs on Web, iOS, Android, Cloud.
What is HOMER Energy best used for?
HOMER Energy is most often used for sizing and optimising off-grid and microgrid systems, modelling the economics of solar, wind and battery combinations, electric bill optimisation for grid-connected sites and ev charging, utility-scale storage investment analysis. Of those, sizing and optimising off-grid and microgrid systems and modelling the economics of solar, wind and battery combinations are not what Wattwatchers EMS is typically brought in for.
What can HOMER Energy do that Wattwatchers EMS cannot?
HOMER Energy covers Microgrid optimization, Techno-economic analysis, Component library, Sensitivity analysis. Wattwatchers EMS covers Real-time monitoring, Energy analytics, Smart recommendations, Alert system. Both handle Cloud deployment, Web support, English language support.

Answered from the vendors’ own pages

HOMER Energy: What are the pricing options for HOMER Energy?

HOMER Energy pricing information is not publicly available on their website. Customers must contact the vendor directly to obtain pricing information, trial access, and licensing options.

Source
Wattwatchers EMS: What data does Wattwatchers monitor?

Wattwatchers measures consumption at the device or circuit level in real-time, identifies equipment inefficiencies, and streams data through cloud dashboards for detailed energy consumption pattern analysis.

Source
HOMER Energy: Does HOMER Energy offer a free trial or demo?

Trial or demo availability cannot be confirmed from publicly accessible pages. Visit the main website or contact HOMER Energy sales directly to inquire about evaluation options.

Source
Wattwatchers EMS: What web-based tools does Wattwatchers provide?

Wattwatchers provides Fleet Management for fleet overview and device health, an Onboarding tool for smartphone-based device configuration, and a Dashboard for customers to view sites and data.

Source
Wattwatchers EMS: What is the mydata.energy app?

mydata.energy is Wattwatchers' mobile application available on iPhone and Android that provides real-time energy management and monitoring for homes and small businesses.

Source
Wattwatchers EMS: How does ADEPT help with energy management?

ADEPT is Wattwatchers' agile development platform for distributed energy that enables fleet analytics, real-time performance analysis, and zero-code prototyping of custom analytics rules.

Source
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