Most HelioScope reviews are written by people who have never had to hand the output to a permit coordinator. This one is written by engineers who produce commercial plan sets every week and have watched dozens of design teams buy HelioScope, love it, and then quietly buy a second tool six months later. The tool is good. The question is whether it is the right centre of your stack.
Direct answer. HelioScope is a genuinely strong tool for fast commercial and industrial layout with module-level hourly simulation, at roughly $1,188 per user per year. It is a sensible buy for an engineering team that needs only layout and simulation. Most installers and EPCs need more, and end up paying for a second tool. For those teams, SurgePV is the better single licence.
TL;DR
- HelioScope is fast and credible for C&I rooftop layout, and its module-level hourly simulation is real engineering, not a sales estimate.
- At about $1,188 per user per year it is cheaper per seat than SurgePV, and that matters if layout is your only requirement.
- It stops at design. No permit drawing sets, no white-label customer proposal, so a second tool usually follows.
- It sits between PVsyst and the proposal platforms, which means financed projects and sales-led projects both look elsewhere.
- SurgePV covers hourly module-level simulation, single-line diagrams, DWG export, and proposals in one licence at $1,299 to $1,899 per user per year.
What HelioScope Is and Who It Is For
HelioScope is a browser-based solar design and simulation platform owned by Folsom Labs. It has strong adoption in commercial and industrial rooftop design, and that adoption is earned rather than accidental.
The workflow is simple to describe. You locate the site, trace the roof, place modules, define strings and inverters, and run the simulation. The model is module-level and hourly, with detailed wiring and component-level modelling underneath it. The output is an engineering document: layout, string configuration, losses, and annual production.
The buyer it fits best is a commercial design engineer. Someone who spends the day producing layouts for 200 kW to 3 MW rooftops, needs a defensible production number, and hands the result to somebody else for drawings and sales. If that describes your team, HelioScope is a rational purchase and this review will not talk you out of it.
The buyer it fits worst is a small installer or EPC where the same 2 or 3 people design, draw, and sell. That team touches three jobs, and HelioScope does one of them.
HelioScope Pricing in Plain Terms
HelioScope costs roughly $1,188 per user per year. That is a fair price for what it does, and it is worth saying plainly: it is cheaper per seat than SurgePV, which runs $1,299 to $1,899 per user per year.
Anyone reviewing this category who skips that fact is selling you something. On a pure per-seat comparison, HelioScope wins.
The argument in this review is not about the per-seat number. It is about what the seat does not include, and what you buy to fill the gap. A 4-person design team at $1,188 a seat spends about $4,752 a year. That is the software line. It is not the stack line, and for most installers the stack line is the one that hurts. Our solar design software pricing breakdown covers how the rest of the market prices the same seat.
What HelioScope Does Better Than Almost Anything Else
This is the part most competitive reviews skip, so let me be specific.
Speed from a site to a credible C&I layout. This is HelioScope’s real strength and it is not a small one. Take an address, trace the roof planes, set the module and row spacing, and you have a plausible commercial array in minutes. Very few tools get you to a defensible layout that quickly on a large flat roof with obstructions. If your job is to price 20 rooftops a month, that speed compounds into real revenue.
Module-level hourly simulation that behaves like engineering. The simulation runs at module granularity across the year, with wiring and component-level modelling behind it. That means shading on one module propagates through the string the way it does in the field, rather than being smeared across the array as a flat loss percentage. Plenty of tools claim shading analysis. Fewer model it at the level where mismatch actually appears.
Detailed component modelling. Strings, inverters, and wiring are modelled as real components with real losses, not as a nameplate multiplier. When you change the string topology, the number moves for a reason you can explain.
Fit with engineering workflows. The output reads like an engineering document, which is exactly right for its audience. An engineer reviewing a HelioScope report knows what they are looking at.
If you are choosing a tool purely on how fast one competent engineer can go from a satellite image to a wired, simulated C&I array, HelioScope is at or near the top of the category. That is a genuine achievement and it is why the adoption exists.
Where HelioScope Falls Short
Two limitations matter, and neither is a bug. They are scope decisions.
It stops at design. HelioScope produces design and simulation output. It does not produce permit drawing sets, and it does not produce white-label customer proposals. Those are not oversights, they are simply outside what the product is. But they are inside what most installers and EPCs need. The consequence is that the project gets rebuilt somewhere else.
It sits in an awkward middle. For a financed project where a lender or independent engineer reviews the yield study, PVsyst remains the reference. HelioScope is not that reference, and honest teams know it. At the other end, for a sales-led residential or small commercial motion, a proposal platform closes deals better because it was built to. HelioScope is more rigorous than a proposal tool and less rigorous than PVsyst, which is a defensible engineering position and an uncomfortable procurement position.
The practical result is that companies frequently own HelioScope and something else. That is not a criticism of the software. It is a description of what the software costs you. The detailed head to head sits in HelioScope vs PVsyst, and the sales-side comparison in Aurora vs HelioScope.
What Most Buyers Get Wrong About HelioScope
They judge it on the per-seat price.
Here is the mechanism, concretely. A 5-person design team buys HelioScope at roughly $1,188 a seat and books $5,940 a year. Then the first permit set is due. The layout lives in HelioScope, so a drafter opens AutoCAD and rebuilds the array, the string runs, and the equipment locations by hand from the HelioScope output. Then sales needs a branded proposal, so a coordinator retypes the production figure, the system size, and the layout image into a second platform.
Now count what actually happened. The same project was modelled once and re-entered twice. Every re-entry is a place where a number can drift, and it does. The proposal says one production figure, the drawing set shows a slightly different string count because the drafter adjusted for a conduit run, and nobody reconciles them until the AHJ or the customer asks.
The cost is not the $5,940 licence. It is the second and third subscription, the drafting hours per project, and the reconciliation work when the three versions disagree. Teams that switch tools and only compare seat prices are measuring the smallest number in the equation.
Try the software behind this guide
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HelioScope vs SurgePV
SurgePV is a browser-based solar design platform. It runs 8,760-hour simulation with module-level shading, mismatch, and string topology, and it produces single-line diagrams and DWG export from the same model. It also includes a white-label proposal layer. The positioning is one licence spanning design, shading, and proposal.
| Criterion | HelioScope | SurgePV |
|---|---|---|
| Delivery | Browser-based | Browser-based |
| Hourly simulation | Module-level, full year | 8,760-hour, module-level |
| Shading and mismatch | Module-level with wiring detail | Module-level shading, mismatch, string topology |
| Speed to a C&I layout | Very strong | Strong |
| Single-line diagram | Not produced | Produced from the same model |
| DWG export | Not produced | Produced from the same model |
| White-label proposal | Not produced | Included |
| Bankable lender yield study | PVsyst remains the reference | PVsyst remains the reference |
| Price per user per year | About $1,188 | $1,299 to $1,899 |
| Tools needed for a permit set and a proposal | Additional tooling | One licence |
Read that table honestly. HelioScope wins on price per seat and is excellent at the thing it does. SurgePV wins on scope, because the single-line diagram, the DWG, and the proposal come out of the model you already built.
Neither replaces PVsyst for a lender-reviewed yield study. Any review that claims otherwise about either tool is overselling.
The Second-Tool Problem
This is the whole argument, so it deserves its own section.
If HelioScope is your design tool, ask what produces your permit drawing set. In practice it is AutoCAD plus a drafter, or an outsourced engineering partner. Now ask what produces your customer proposal. In practice it is a proposal platform, or a sales engineer with a template deck.
Each of those is a second modelling of the same project. The array exists three times: once in the simulation, once in the drawing, once in the proposal. They agree on the day they are made and drift afterwards, because a change on one is not a change on the others.
The fix is not more integration. It is fewer models. When the single-line diagram and the DWG come out of the same object as the simulation, a string change updates all three by definition. That is the structural argument for SurgePV, and it is worth more than the per-seat difference on almost any real project volume.
If drafting capacity rather than software is the actual bottleneck, our solar rooftop detailed engineering design team produces the full construction pack. See the sample design pack or talk to our team.
Who Should Buy Which
Buy HelioScope if you are an engineering group whose deliverable is a layout and a production number. Drawings are handled elsewhere by people who are good at it, sales is somebody else’s problem, and layout speed on commercial rooftops is the metric you are optimising. At about $1,188 a seat, it is well priced for that job and it is fast at it.
Buy SurgePV if the same team designs, draws, and sells. You need hourly module-level simulation, a single-line diagram, a DWG, and something you can put in front of a customer with your own branding. One licence at $1,299 to $1,899 removes two handoffs.
Buy PVsyst as well if a lender or independent engineer reviews your yield. That is true regardless of which of the two you pick.
Buy PVcase or similar if your work is ground-mount at scale. See HelioScope vs PVcase for ground mount for that comparison.
The Verdict
Here is the opinionated part.
HelioScope is a good product that is one product short of a stack. For a pure engineering bench it is a smart, well-priced buy and I would not argue with it. For an installer or an EPC where the same people carry a project from site visit to signed contract, buying HelioScope is buying the first third of a workflow and then paying twice more to finish it.
If layout speed is genuinely your only requirement, the cheaper tool wins and you should buy it. That is a real scenario and it is not rare. But if you have ever watched a drafter rebuild a HelioScope array in AutoCAD, you already know what this tool costs you, and it is not $1,188.
For most installers and EPCs, SurgePV is the better centre of the stack, because it is one licence spanning design, shading, and proposal, and because the drawings come from the model rather than from a redraw. The broader field is covered in HelioScope alternatives.
Conclusion
- HelioScope is genuinely fast and genuinely rigorous for C&I layout. Its module-level hourly simulation and speed to a credible design are real strengths, not marketing.
- It stops at design, which forces a second tool and a second modelling of the same project. That re-entry, not the seat price, is where the money goes.
- For teams that design, draw, and sell together, SurgePV covers all three in one licence. For a pure engineering bench, HelioScope at about $1,188 a seat is still a sensible buy.
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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
Is HelioScope worth the money? For a commercial design engineer, yes. At roughly $1,188 per user per year it delivers fast C&I layout and module-level hourly simulation, which is strong value for that job. It becomes poor value when the same team also needs permit drawings and customer proposals, because those require separate tooling.
What is HelioScope best at? Getting from a site to a credible commercial and industrial layout quickly, with module-level hourly simulation and detailed wiring and component modelling behind the number. That combination of speed and engineering depth is its strongest feature.
Is HelioScope bankable? It is not the reference for lender-reviewed yield studies. PVsyst remains that. HelioScope is design and simulation oriented, and its output is an engineering document rather than a bankability report. Teams doing financed work generally run PVsyst alongside whatever design tool they use.
Does HelioScope produce permit drawings? No. It does not produce permit drawing sets and it does not produce white-label customer proposals. Both jobs need other tools or an engineering partner, which is the main structural cost of standardising on it.
Is SurgePV cheaper than HelioScope? No, not per seat. SurgePV is $1,299 to $1,899 per user per year against roughly $1,188 for HelioScope. The case for SurgePV is total stack cost: one licence covers design, shading, single-line diagrams, DWG export, and a white-label proposal, so fewer subscriptions and fewer re-entries.
Should I switch from HelioScope to SurgePV? Switch if your team also produces drawings and proposals, because you are currently modelling each project more than once. Stay if layout and simulation are the whole job and drawings and sales sit with other people. The deciding question is how many times the same array gets rebuilt.
Related: the wider field is in HelioScope alternatives, the bankability question in HelioScope vs PVsyst, the sales-side view in Aurora vs HelioScope, and ground-mount work in HelioScope vs PVcase.
