Philippine EPCs buy software in a market with two unusual features. Electricity is expensive by regional standards, so every kilowatt-hour the array loses costs real money. And the sky is dominated by diffuse light, so the shading models most tools ship with are calibrated for the wrong physics. Those two facts decide which layers of the stack are worth paying for.
Direct answer. Solar software in the Philippines splits into six layers: design and simulation, sales and proposal, compliance documentation, monitoring, CRM and operations, and procurement. The compliance layer runs on PEC 2017, the NSCP, a Professional Electrical Engineer signature, and a utility or electric cooperative that sets its own interconnection process. Most installers need three layers.
TL;DR
- Six layers, and most Philippine installers genuinely need three.
- The compliance layer is PEC 2017 electrical work, NSCP structural work, and a licensed Professional Electrical Engineer signing the design.
- Interconnection varies by service area, because distribution utilities and electric cooperatives each run their own process.
- High diffuse fraction means beam-only shading models understate the loss, the opposite of the error they make in northern Europe.
- Expensive power makes each lost kilowatt-hour worth more, so quote shading loss in pesos rather than percent.
What “Solar Software” Actually Means in the Philippines
The category covers six separate jobs, and the Philippine weighting between them differs from the US or Europe.
Design and simulation. Layout, string sizing, shading, and yield, on rooftops hemmed in by immediate neighbours.
Sales and proposal. Savings documents for a commercial buyer who is comparing quotes on payback, not on presentation.
Compliance documentation. Single-line diagrams, protection details, earthing, and structural drawings, signed by a licensed Professional Electrical Engineer. This is the Philippine-specific layer.
Monitoring. Post-commissioning production, usually from the inverter vendor’s portal.
CRM and operations. Lead tracking, site survey scheduling, and follow-up across a long commercial sales cycle.
Procurement. Module and inverter sourcing, run on distributor relationships rather than a platform.
The Philippine Solar Software Stack, Layer by Layer
| Layer | Representative tools | Who uses it | Typical cost per year |
|---|---|---|---|
| Design and simulation | PVsyst, SurgePV, HelioScope | Design engineers | PHP 45,000 to PHP 290,000 per seat |
| Sales and proposal | SurgePV, OpenSolar, QuickEstimate | Sales team | PHP 0 to PHP 180,000 per seat |
| Compliance documentation | AutoCAD, SurgePV, outsourced drafting | PEE and drafting | Per drawing or PHP 45,000 upward |
| Monitoring | Inverter vendor portals | O&M | Usually bundled with hardware |
| CRM and operations | Zoho, HubSpot, spreadsheets | Everyone | PHP 0 to PHP 90,000 per seat |
| Procurement | Distributor relationships | Purchasing | Not a software purchase |
Exchange rate used here is roughly 58 pesos to the dollar, and it is illustrative only. Seats quoted in dollars move against a peso project margin, so treat the peso figure as a moving target rather than a budget line.
Two of the six layers are not really purchases. Monitoring arrives with the inverter. Procurement runs on supplier relationships. That leaves four to decide about, and most installers outsource one of them.
The Layer That Is Specific to the Philippines
Compliance here is split across two codes and one signature.
Electrical installation follows the Philippine Electrical Code, PEC 2017. Structural work, including the mounting system and its attachment to the building, follows the National Structural Code of the Philippines. The design is signed by a licensed Professional Electrical Engineer, which means the deliverable is a sealed set of drawings rather than a software export.
Interconnection is the part that surprises people arriving from a single-utility market. Distribution utilities and electric cooperatives handle it, there are many of them, and each runs its own process. What Meralco expects in its service area is not what a provincial cooperative expects. The requirement varies by service area, not by national rule, so a template pack goes stale the moment you cross into a new franchise.
Net metering exists, but it is capped and it compensates exported energy below the retail rate. That has a direct design consequence. Oversizing to export is weak economics, so the array should be sized against the daytime load profile. Self-consumption is where the money is, and the yield model needs to be run hour by hour against actual consumption rather than compared to an annual kilowatt-hour total.
No subscription fixes any of this. It is a drafting and licensing capability, in house or outsourced.
Try the software behind this guide
Under a Philippine sky, the shadow is not the whole loss
SurgePV runs 8,760-hour shading against a full 3D scene of neighbouring structures, counts the blocked sky dome as well as the beam shadow, then exports the single-line diagram and DWG for your utility submission.
Book a free SurgePV demo →No credit card. 20-minute walkthrough on one of your own projects.
Why the Diffuse Sky Changes the Design Layer
This is the single most useful technical point on the page, and it is worth stating carefully.
The Philippines sits near the equator with high humidity and heavy cloud. A large share of annual irradiance therefore arrives as diffuse light from the whole sky dome, not as a direct beam from the sun’s position. That changes what an obstruction does.
A neighbouring building does not merely cast a shadow across the array for two hours in the morning. It permanently removes a slice of the sky the modules can see. That slice was delivering diffuse light in every hour of every day, including the hours when no shadow falls anywhere near the array.
A shading model that only tracks beam blocking counts the two hours and misses the rest. The result is a loss figure that is too low. In London the same tool errs the other way, because a much larger share of the resource is diffuse relative to a weak beam and the model’s simplifications land differently. Importing a temperate configuration into Manila gives you an optimistic answer, and optimism is the expensive direction.
The fix is not exotic. Use a tool that computes a sky view factor per module and runs an 8,760-hour simulation against a measured 3D scene.
Why the Loss Should Be Quoted in Pesos
Philippine electricity is expensive by regional standards. That does two things to the software decision.
First, it raises the value of accuracy. A 6 percent shading loss on an expensive tariff is worth more than the same 6 percent somewhere with cheap power, so a careful study is justified on projects that would be too small to bother with elsewhere. The threshold for a proper 3D shading model drops.
Second, it changes how you present the finding. A commercial customer hears “6 percent” and files it under rounding error. The same customer hears an annual peso figure and asks what it would cost to move the array. Convert the loss to pesos per year and then to pesos across the system life. That number is what gets a mounting change approved.
What Outranks the Software Entirely
Typhoon wind loading. It frequently decides where and how an array can be mounted, and it overrides the shading optimum.
The position that produces the best annual yield is often not a position the structure can carry through a design wind event. Uplift on a rooftop array is a structural engineering question answered against the NSCP, not a question any design platform decides. If the wind case rules out the eastern edge of the roof, the shading study reruns on what is left.
Sequence it correctly. Establish the structurally viable mounting zones first, then optimise inside them. Teams that run the yield model first spend the difference redoing it.
Our solar civil and structural engineering team produces wind and structural assessments delivered as STAAD Pro report calculations, with solar rooftop detailed engineering design for the construction pack.
Why Philippine Cities Need a Real 3D Scene
Urban fabric here is dense and low rise. Buildings sit close together, party walls are common, and adjacent structures are often only 1 or 2 storeys taller than the roof you are working on.
That makes obstruction near field, immediate, and permanent. It is not a distant skyline that clips an hour at sunset. It is a wall 4 metres away that removes a quarter of the visible sky for the modules behind it, all year.
Near-field obstruction cannot be approximated with a horizon profile or a shading percentage. It needs a 3D scene with measured heights and measured setback distances. Get the heights wrong by a storey and the answer is wrong by a large margin, because the geometry is close enough that small errors dominate.
What Stack You Need at Your Size
Small installer, residential and light commercial. Two layers. A design tool and spreadsheets. Outsource the sealed drawings per project.
Growing commercial EPC. Three layers. Design, a CRM, and a standing relationship with a Professional Electrical Engineer for the compliance pack. This is where a dedicated design seat clearly pays for itself.
Established EPC across several service areas. Four layers, with drafting brought in house and a CRM that tracks which utility or cooperative each project sits under, because the requirements differ.
Developer scale. All layers, plus bankable yield studies as a repeated deliverable.
Pricing the Whole Stack in Pesos
| Company stage | Layers | Realistic annual software spend |
|---|---|---|
| Small installer | 2 | PHP 45,000 to PHP 150,000 |
| Growing commercial EPC | 3 | PHP 150,000 to PHP 600,000 |
| Established multi-area EPC | 4 | PHP 600,000 to PHP 2,000,000 |
| Developer scale | 5 plus | PHP 2,000,000 upward |
Rate assumed is about 58 pesos to the dollar and it is illustrative. Per-platform detail is in our solar design software pricing breakdown.
What Most Philippine Installers Get Wrong
They import a temperate shading model and trust the shadow.
Here is the mechanism, step by step. The team buys or downloads a tool configured for a European or North American market. They build the site model, place the neighbouring building, and watch the shadow sweep across the array through the day. The tool reports the hours of beam shading and produces a loss figure. It looks rigorous, because a picture of a moving shadow is convincing.
What is not on screen is the sky the building blocks. Under a high-diffuse Philippine sky that blocked dome is delivering irradiance in every daylight hour, and none of it is counted. The reported loss is understated, sometimes materially. The proposal goes out with a yield the array cannot reach, and the shortfall shows up in the first year of monitoring data with no obvious cause.
Note that this is backwards from the error the same tool makes in London, which is why nobody catches it by asking a vendor. The tool is not broken. It is answering a different climate’s question.
Two habits fix it. Check that your shading engine computes a diffuse sky view factor and not only beam obstruction. And validate one commissioned project against its model before you trust the tool on the next 20.
When Software Is Not the Answer
If the wind case or the roof capacity is the gating item, no subscription resolves it. Neither does a licence solve a sealed drawing that a Professional Electrical Engineer has to sign.
See the sample design pack or talk to our team.
Conclusion
- Buy the design layer first, and check its diffuse handling. A beam-only model understates loss in this climate.
- Quote the loss in pesos, not percent. Expensive power makes the peso figure the argument that lands.
- Settle the wind case before optimising yield. Structure decides the mounting zone, software optimises inside it.
In this country series: best solar design software in the Philippines, best solar proposal software in the Philippines, shading analysis software in the Philippines, 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 solar software? An umbrella term for six categories: design and simulation, sales and proposal, compliance documentation, monitoring, CRM and operations, and procurement. In the Philippines, monitoring and procurement are usually not software purchases at all.
What solar software do Philippine EPCs actually use? Commonly PVsyst or SurgePV for design and yield, AutoCAD for the sealed drawings, the inverter vendor’s monitoring portal, and a light CRM or spreadsheets.
How much does solar software cost in the Philippines? Roughly PHP 45,000 to PHP 150,000 a year for a small installer running 2 layers, PHP 150,000 to PHP 600,000 for a growing commercial EPC, and above PHP 2,000,000 at developer scale. Rate assumed is about 58 pesos to the dollar, illustrative only.
Does software handle the interconnection application? No. Distribution utilities and electric cooperatives each run their own process, so the requirement varies by service area. Software produces the drawings; the submission is a local process question.
Who signs a solar design in the Philippines? A licensed Professional Electrical Engineer. Electrical work follows PEC 2017 and structural work follows the NSCP, so a structural engineer is involved on the mounting side too.
Why do imported shading tools understate loss here? Because a large share of irradiance is diffuse. A neighbouring building removes a slice of the sky dome permanently, not just for the hours it casts a shadow. Beam-only models count the shadow and miss the rest.
Related: the design layer in depth is in best solar design software in the Philippines, the sales layer in best solar proposal software in the Philippines, and shading specifically in best solar shading analysis software in the Philippines.
