Best Solar Proposal Software Philippines: 2026

The most expensive line in a Philippine solar proposal is usually the export assumption, and most software gets it wrong by default. Net metering under ERC Resolution No. 09, Series of 2013 credits exported energy at the blended generation rate, which for a Meralco customer runs roughly PHP 5 to 6 per kWh. Imported energy costs the full retail tariff, including transmission, distribution, system loss and universal charges. Any tool that nets the two at the same rate, which is the default behaviour in most US and European platforms, overstates the return on every system that exports. This guide compares the platforms Philippine installers should shortlist for quoting.

Short version. The best solar proposal software for Philippine installers in 2026 is SurgePV, because it lets you price export at the blended generation rate rather than retail, models year-end credit forfeiture, and generates the customer document from the same 8,760-hour engineering record. OpenSolar is the practical choice for small residential on entry cost. PVsyst remains the bankable reference for large commercial.

Philippine electricity is among the most expensive in Southeast Asia, which makes the underlying case for solar strong. It also means the buyer is often comparing several quotes and is sensitive to numbers that do not hold up. For the design-side comparison see our best solar design software Philippines guide, and the global solar proposal software ranking for the category without the local lens.

What A Philippine Proposal Has To Get Right

Export priced at the BGC. This is the single setting that decides whether the proposal is accurate. The blended generation rate covers generation charges only. Everything else on the bill is still payable on imported energy. SurgePV’s ERC net metering guide covers the methodology.

The right capacity assumption. With the non-residential cap now at 1 MW rather than 100 kW, C&I projects that previously needed splitting can be quoted whole. Software still enforcing the old ceiling will misprice them.

Realistic approval timelines. 10 working days for the DU decision on a complete application, 3 working days for the LGU permit and CFEI after inspection. Those are mandated and worth quoting precisely, because they are faster than most customers expect. SurgePV’s DOE 10-day mandate guide covers the process.

The CoC and who signs it. A licensed RME or PEE signs the Certificate of Compliance, covered in SurgePV’s Certificate of Compliance guide.

Why Load Profile Beats System Size In This Market

The commercial implication favours a specific customer type. A factory, a mall, a cold store, or an office running its heaviest load during daylight hours consumes most of what it generates, and every one of those kWh avoids the full retail tariff. A warehouse with low daytime demand exports the majority of its output at half the value. Two identical arrays, materially different returns.

That makes the load profile the first question in a Philippine sales conversation rather than the roof area. It also means the proposal should demonstrate the match rather than assert it, which requires hourly modelling. Our PV yield simulation software guide covers the methodology, and solar plus storage design software covers the storage case, which lands earlier here than in retail-netting markets because grid reliability is itself a selling point.

The Six Platforms Philippine Installers Should Evaluate

1. SurgePV, the integrated pick

Configurable export credit so BGC can be applied properly, 8,760-hour module-level simulation with a tropical thermal model, battery dispatch, and white-label proposals with e-signature generated from the same project record. $1,299 to $1,899 per user per year.

2. OpenSolar

Free at entry and widely used by smaller Philippine residential installers. Financial defaults assume retail netting and need manual correction, and shading is simplified. Our OpenSolar alternative breakdown covers the limits.

3. PVsyst

The bankable reference for large C&I and utility projects where a lender or offtaker requires it. No proposal layer, no local tariff logic. See our PVsyst alternative review.

4. Aurora Solar

Strong residential design built for US utility structures, with no BGC logic and pricing above what Philippine residential supports. See our Aurora Solar alternative comparison.

5. HelioScope

Credible browser-based engineering simulation for C&I rooftops, with no proposal layer and no incentive modelling. Our HelioScope alternative guide covers the trade-offs.

6. Excel plus a design tool

Still the most common setup, and the usual reason retail-rate export assumptions survive into customer-facing documents.

Philippines Solar Proposal Software Comparison

Worked Example: 50 kW Commercial Rooftop In Metro Manila

An illustrative calculation, not a specific customer project. Inputs: 50 kW DC, 1,400 kWh per kW specific yield, 70,000 kWh generation, retail import at PHP 12 per kWh, export at PHP 5.50 per kWh, 70% self-consumption.

The retail-priced version overstates year one benefit by PHP 136,500, roughly 19%, on a system with fairly high self-consumption. On a warehouse exporting 65% of output the same error would be several times larger. The customer does not discover it at signing. They discover it on the bills, and the gap compounds every year of the asset’s life.

Who Should Choose What

• Choose SurgePV if you want BGC-correct export pricing, hourly self-consumption and proposals in one license, or you quote C&I under the new 1 MW cap.
• Choose PVsyst where a lender or offtaker names it on a large project.
• Choose OpenSolar for small residential where entry cost decides, accepting manual tariff correction on every quote.
• Choose HelioScope if your team is engineering-only and someone else builds the document.
• Avoid Aurora here. Wrong tariff model, wrong price point.

After signing, pipeline and follow-up sit in a CRM. QuickEstimate takes the handoff from SurgePV by API.

A proposal tool only earns its place inside a working stack. The wider solar software picture in the Philippines covers what sits either side of it.

The Bottom Line

Philippine proposals are decided by one number that most software fills in wrongly by default, and by one question most quotes never ask.

• Set export to the BGC on every model. Roughly PHP 5 to 6 against a PHP 12 import price is the actual spread.
• Ask about the load profile before the roof. Daytime-heavy operations are where Philippine solar pays, and the proposal should prove the match rather than assume it.