Chile has the best solar resource on earth and the most awkward geography to put it in. The Atacama gets irradiance levels nothing else matches, and the country is a narrow strip with the Andes down one side, which means terrain shading is a live issue on a great many sites. A study that models the array beautifully and assumes a flat horizon is answering the wrong question here.
Direct answer. The best solar shading analysis software in Chile is PVsyst for anything financed, because it handles far-horizon terrain profiles and tracker backtracking properly and lenders expect its output. PVcase suits large ground-mount layout on real terrain, and SurgePV covers rooftop and distributed generation work alongside the layout and single-line diagram.
TL;DR
- Andean and coastal-range terrain makes far-horizon shading a real loss on many Chilean sites.
- At utility scale, tracker backtracking and terrain-aware row pitch are the shading problem.
- Atacama skies are exceptionally clear, so shadows cost close to their full geometric value.
- Soiling in the desert is severe and gets confused with shading in performance disputes.
- Distributed generation runs under the PMGD framework with SEC oversight, and self-consumption under Ley 21.118.
What Chile Actually Changes About Shading Analysis
Terrain is everywhere. Chile is a narrow country between the Andes and the Pacific, with a coastal range in between. A great many sites, including plenty in the north, have significant elevation in view to the east or west. That removes the first or last hours of the day, and the loss is invisible to any model that only covers the array and its immediate surroundings. A far-horizon profile is a required input on Chilean sites, not an optional refinement, and it has to be surveyed or taken from an elevation dataset rather than assumed.
Utility scale is a geometry problem. The large northern projects are ground-mount, frequently on single-axis trackers, and there the shading question is about pitch, terrain slope, and backtracking strategy. Trackers rotate back from the optimal angle at the start and end of the day to avoid shading the row behind, and modelling them as simply sun-following overstates yield by a material margin that no technical advisor will accept.
Slope changes effective pitch. Across a large plot, undulation makes the spacing between rows behave as wider on falling ground and tighter on rising ground. A uniform pitch applied to real terrain both wastes land in some places and produces localised morning shading in others, and neither shows up in a clear-day commissioning test.
Clear skies make shadows expensive. Atacama irradiance is overwhelmingly direct beam. There is essentially no diffuse cushion, so an obstruction removes close to the full geometric amount. Shading errors here cost more than the same errors in a cloudy market.
Soiling confounds it. Desert dust deposition is severe, and the resulting loss is large enough to be confused with shading when production falls short. Both assumptions belong in the original study, stated separately, or the eventual dispute is unresolvable.
The frameworks are defined. Distributed generation runs under the PMGD arrangement with oversight from the Superintendencia de Electricidad y Combustibles, and residential and commercial self-consumption under Ley 21.118. Neither prescribes a shading method.
The 7 Platforms Ranked for Chile
| Platform | Best for | Far-horizon terrain profile | Backtracking and tracker modelling | Price per seat per year |
|---|---|---|---|---|
| PVsyst | Financed yield studies | Yes, explicit | Best in class | ~$500 |
| PVcase | Large ground-mount on terrain | Yes, native | Yes | Enterprise quote |
| SurgePV | Rooftop and DG plus design and SLD | Yes | Fixed-tilt focus | $1,299 to $1,899 |
| SAM (NREL) | Sensitivity and technology studies | Yes | Yes | Free |
| HelioScope | C&I rooftop and small ground-mount | Limited | Limited | ~$1,188 |
| Aurora Solar | Complex rooftop geometry | Limited | No | $1,908 to $3,108 |
| SketchUp plus Skelion | Bespoke terrain and geometry | Manual | Manual | ~$700 plus plugin |
PVsyst is the engine of record for financed work, and its separation of horizon profile from near-shading is exactly what Chilean terrain requires. See PVsyst price and our PVsyst loss diagram guide.
PVcase is the right tool for laying out a large plot where pitch has to follow the ground.
SurgePV covers rooftop and distributed generation, running 8,760-hour shading and carrying the model into string design, the single-line diagram, and DWG export.
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Put the cordillera in the model before you price the site
SurgePV runs 8,760-hour shading against terrain and near-field obstructions on a southern hemisphere sun path, then carries the same model into string design and DWG export.
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What a Chilean Shading Deliverable Has to Contain
- Far-horizon terrain profile, surveyed or taken from an elevation dataset, on every site.
- Terrain-aware row layout on ground-mount, with pitch varied on slopes rather than applied uniformly.
- Backtracking strategy modelled explicitly where trackers are used.
- Hourly shading loss with monthly breakdown.
- Terrain and near-field losses reported separately, because only one of them is remediable.
- Soiling assumption stated separately from the shading figure.
- Per-string or per-block loss table for rooftop and distributed generation work.
Item 1 is the input most often skipped and the one that most often changes the investment decision. A site whose eastern horizon is a mountain range loses its mornings permanently, and that is something a buyer should learn before signing rather than after.
Pricing in Chilean Pesos
| Stack | USD per year | Approx. CLP at 950 | Covers |
|---|---|---|---|
| PVsyst | ~$500 | ~$475,000 | Financed yield and terrain shading |
| HelioScope | ~$1,188 | ~$1,128,600 | C&I layout and shading |
| SurgePV | $1,299 to $1,899 | ~$1,234,050 to $1,804,050 | Shading plus full design |
| Aurora | $1,908 to $3,108 | ~$1,812,600 to $2,952,600 | Sales-grade shading plus proposal |
Exchange rate is illustrative. PVcase is quoted per project.
What Most Chilean Developers Get Wrong
They assume the horizon is flat because the ground is.
The Atacama looks flat, and much of the plot may be. That says nothing about what is on the horizon twenty kilometres east. A mountain range in that direction removes the first hours of every day, and because those hours are the coolest and the modules are at their most efficient, the loss is worth more per kilowatt-hour than a midday loss would be. Surveying the horizon profile takes an instrument or a terrain dataset and very little time, and on a site being valued for a twenty-year power purchase agreement it is not optional.
The second mistake is a uniform row pitch across undulating ground, and modelling trackers without backtracking. Both produce yield figures that fail technical review, and correcting them late in a financing process is considerably worse than getting them right at the start.
When Software Is Not the Answer
Foundation design on a ground-mount site, and structural assessment on a commercial rooftop, are engineering deliverables rather than modelling outputs. Seismic loading is a real constraint in Chile and it is not something a shading tool speaks to.
Our solar civil and structural engineering team produces those with calculations delivered as STAAD Pro report calculations, and solar ground mount design covers layout, pitch, and foundation for larger sites. See the sample design pack or talk to our team.
Conclusion
- Survey the horizon even on flat ground. The cordillera is the loss that no array layout can recover.
- Vary pitch with terrain and model backtracking. Uniform pitch and sun-following trackers both fail technical review.
- State soiling separately from shading. Desert dust is large enough to swamp the shading figure it gets blamed for.
In this country series: solar software in Chile, best solar design software in Chile, best solar proposal software in Chile, Pvcase review. Tool deep dives: Pvsyst review, Helioscope review.
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Disclosure and accuracy note
Commercial relationship. Heaven Designs and SurgePV are part of the same group. Treat our recommendation of SurgePV as a vendor making its own case, not an independent verdict. We have tried to describe every other product fairly, and to say plainly where a competitor is the better choice.
Pricing. All prices are indicative, compiled from public sources when this page was written. They vary by tier, region, contract term and exchange rate, and change without notice. Several vendors quote rather than publish, and some price in currencies other than the US dollar, so a converted figure moves with the exchange rate. Confirm current pricing with the vendor before you decide anything.
Trademarks and corrections. All product names and trademarks belong to their respective owners, and are used here for identification and comparison only. Their use does not imply affiliation with or endorsement by those companies. If anything here is out of date or wrong, tell us and we will correct it.
FAQ
What is the best solar shading analysis software in Chile? PVsyst for anything financed, because it handles far-horizon terrain and tracker backtracking properly. PVcase for large ground-mount layout on real terrain, SurgePV for rooftop and distributed generation work that also needs drawings.
Why does terrain shading matter in the Atacama? Because a flat plot says nothing about the horizon. Andean and coastal-range elevation removes the first or last hours of every day, and that loss is invisible to any model covering only the array.
Does backtracking need to be modelled? Yes. Single-axis trackers rotate back from the optimal angle at the start and end of the day to avoid shading the row behind. Modelling them as sun-following overstates yield and will not survive technical review.
Do shadows cost more in Chile? Close to their full geometric value. Atacama irradiance is overwhelmingly direct beam, so there is no diffuse resource to soften an obstruction.
How does soiling relate to shading here? Desert dust deposition is severe enough that the resulting loss can exceed the shading loss. State both assumptions separately in the original study so a later shortfall can be diagnosed rather than argued.
How much does solar shading analysis software cost in Chile? From roughly $475,000 CLP per year for PVsyst alone to $2.95 million CLP for Aurora’s higher tiers, with PVcase quoted per project. Full math is in our solar design software pricing breakdown.
Related: the wider tool decision is in best solar design software in Chile, and the method in how to do shadow analysis for solar rooftop projects.
