OpenSolar alternatives
A homeowner looking for an OpenSolar alternative often needs a simpler way to understand a proposal. An installer looking for an alternative needs production design and sales capabilities. The homeowner tools below should not be mistaken for professional substitutes.
| Tool | Best fit in this guide | Access and tradeoffs |
|---|---|---|
| PVWatts | Use PVWatts for a focused production cross-check. It does not replace the proposal and business workflow. | Public web calculator; API use has separate key and usage requirements. |
| CleanFuture (ours) | Use CleanFuture to discuss a homeowner’s goals and organize assumptions. It is an alternative to learning a professional interface, not to professional design work. | Account required to save; saved AI estimates currently require an active subscription. |
| EnergySage | Use EnergySage to obtain installer offers as a homeowner. The installer, rather than the homeowner, remains responsible for designing the proposed system. | Free for shoppers; participating providers support the marketplace. |
What you are replacing
OpenSolar provides professional design and proposal workflows, including 2D, 3D and manual design options described in its documentation.
Imagery and design modes vary by location. A software layout is not a substitute for site verification or professional responsibility.
PVWatts
- Category
- Public photovoltaic production model
- Best for
- Use PVWatts for a focused production cross-check. It does not replace the proposal and business workflow.
- Access
- Public web calculator; API use has separate key and usage requirements.
PVWatts models grid-connected photovoltaic output using inputs such as capacity, tilt, azimuth and losses. Its V8 API documents monthly and hourly output options.
What to weigh before choosing
A modeled production result does not verify usable roof area, structural condition, electrical design or a household’s bill savings.
CleanFuture (ours)
- Category
- Conversational household planning
- Best for
- Use CleanFuture to discuss a homeowner’s goals and organize assumptions. It is an alternative to learning a professional interface, not to professional design work.
- Access
- Account required to save; saved AI estimates currently require an active subscription.
Discuss your energy plan in Chat, explore supporting Map and Data pages, and keep preliminary estimate versions inside My system. You can explicitly publish a limited read-only snapshot.
What to weigh before choosing
Not installer bidding, professional roof design or a guaranteed savings calculation. A regional solar estimate excludes battery costs and detailed tariff modeling.
EnergySage
- Category
- Homeowner quote marketplace
- Best for
- Use EnergySage to obtain installer offers as a homeowner. The installer, rather than the homeowner, remains responsible for designing the proposed system.
- Access
- Free for shoppers; participating providers support the marketplace.
EnergySage organizes installer quotes and lets shoppers compare equipment, warranties and financing with advisor support.
What to weigh before choosing
A marketplace shortlist is not every installer in your area. Confirm local availability and the scope of each proposal.
Before changing tools
- Identify whether you need a different design platform or only a clearer homeowner explanation.
- Retain designs, assumptions and proposal records in supported export formats. Check access and export terms before relying on an integration.
- Revalidate any re-created model. This comparison does not establish file compatibility or a migration path between products.
Moving your questions between tools is a manual handoff. This guide does not promise file compatibility, automatic imports or account cancellation.
Questions worth asking
Is CleanFuture a complete replacement for OpenSolar?
A homeowner does not need to become a solar designer to ask good questions. CleanFuture can keep needs and assumptions understandable while a professional handles the design. OpenSolar also advertises AI features, so AI alone is not a meaningful reason to prefer CleanFuture. Not installer bidding, professional roof design or a guaranteed savings calculation. A regional solar estimate excludes battery costs and detailed tariff modeling.
When should I keep using OpenSolar?
Stay with OpenSolar if you need to design and sell systems. None of the homeowner planning or shopping tools listed here replaces the complete professional workflow. If changing design platforms, evaluate other professional platforms separately.
Turn the reading into a plan
Bring your questions to Chat and keep the assumptions tied to your system.
Discuss my plan in ChatYour question and this article’s context will be prefilled for you to review and send. Account required to save a system; saved AI estimates currently require an active subscription. Preliminary guidance, not an installation quote.
Sources and review method
We make CleanFuture. These are our editorial recommendations based on first-party documentation and our own product’s scope, not hands-on performance tests. We recommend other products when they fit the job better. US-focused; local availability and terms need checking.
We selected five overlapping solar workflows: quote comparison, installer research, advisor-led buying, production modeling and professional design. PVWatts and OpenSolar are adjacent tools, not equivalent homeowner services. This is a focused shortlist, not an exhaustive market survey or an objective top-five company ranking.
Recommendations weigh the task, required inputs, output, access terms and limitations. We did not test purchases, installation quality, model accuracy or response times. Product descriptions come from the linked official documentation; workflow advice and rankings by fit are our editorial judgment. We do not use numeric ratings or vendor savings claims to choose winners.
For broader whole-home electrification, also consider QuitCarbon’s planning and coaching. Solar.com is another shopping service outside this five-tool selection. Exclusion is not a negative evaluation.
Sources: OpenSolar: professional platform; OpenSolar: first project design guide; OpenSolar: free platform and paid external access; CleanFuture: solar estimate workflow; PVWatts: public calculator; PVWatts V8: official model inputs and outputs; EnergySage: marketplace process; EnergySage: getting and managing quotes; EnergySage: company and marketplace model.
Capabilities and terms can change. Check the provider’s current documentation and your actual proposal before committing.