CleanFuture vs PVWatts
PVWatts models grid-connected photovoltaic output using inputs such as capacity, tilt, azimuth and losses. Its V8 API documents monthly and hourly output options.
| Decision | PVWatts | CleanFuture (ours) |
|---|---|---|
| Core output | Modeled PV energy production. | A planning record and regional estimate with financial assumptions. |
| Inputs to inspect | Capacity, array geometry and losses, among other model parameters. | Location, bill, roof and shade assumptions collected in Chat. |
| Best decision | How production changes with specified system assumptions. | What to ask next and how the pieces of a household plan fit together. |
| Installation assurance | Not a site or engineering approval. | Not a site or engineering approval. |
When PVWatts is better
Checking grid-connected solar production assumptions. Stay with PVWatts if you need transparent control over a focused production scenario. A Chat interface or a marketplace does not make the physical model more reliable simply by making its output easier to read.
A modeled production result does not verify usable roof area, structural condition, electrical design or a household’s bill savings.
When CleanFuture fits
CleanFuture brings planning questions, evidence and saved estimates together. That is useful context around a model, but this comparison does not claim its regional estimate runs on PVWatts or has equivalent accuracy. Compare model inputs before interpreting different outputs.
Account required to save; saved AI estimates currently require an active subscription. Not installer bidding, professional roof design or a guaranteed savings calculation. A regional solar estimate excludes battery costs and detailed tariff modeling.
See how the CleanFuture estimate workflow worksA practical way to use the tools
- Get a proposed DC system size and roof orientation. Record units; a panel nameplate rating and an annual energy total describe different things.
- Run a baseline with explicit tilt, azimuth and losses. Save the assumptions alongside the output.
- Change one uncertain input at a time. Use the spread to frame a question for the designer instead of picking the most favorable answer.
- Keep the production check separate from financial analysis. To estimate bill impact, obtain the applicable tariff, consumption timing and export treatment.
Questions worth asking
Is PVWatts a better choice for technical production checks?
Yes, for an explicit grid-connected PV production modeling task it is the more focused choice. CleanFuture offers a broader planning workflow, not a claim to superior validated production modeling.
Can I turn annual production straight into savings?
Do not assume every generated kilowatt-hour offsets the same retail price. Your tariff, exports and consumption timing matter. CleanFuture’s regional avoided-bill illustration does not resolve those details either.
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: PVWatts: public calculator; PVWatts V8: official model inputs and outputs; CleanFuture: solar estimate workflow.
Capabilities and terms can change. Check the provider’s current documentation and your actual proposal before committing.