Do you design Malaysian rooftop projects for Solar ATAP? Solar ATAP is the Solar Accelerated Transition Action Programme, a government rooftop solar scheme. SEDA calls it a continuation of the Net Energy Metering (NEM) scheme, which ended in June 2025. It started on 1 January 2026. Arka360 has a Malaysia page that names MYR proposals (proposals in ringgit, the Malaysian currency) and TNB (Tenaga Nasional Berhad) tariff structures. HelioScope documents a single line diagram (SLD), a simple drawing of how the system is wired, on every plan. OpenSolar’s core app is free and accepts a custom tariff you enter yourself. API Access and connectors are charged from 16 April 2026. PVsyst is the pick for a zero-export or capped-export yield study, which models how much power a system makes. SELCO is generation for your own use, with no export of the excess. PVsyst is a Windows desktop program and does not produce proposals. None of the vendor pages we read describe the Solar ATAP credit rules, so confirm that before you buy.
This is a desk comparison of what each vendor publishes, checked October 2026. We have not run side-by-side tests. Local rules below come from the Energy Commission (Suruhanjaya Tenaga), which regulates Solar ATAP, and SEDA Malaysia (the Sustainable Energy Development Authority), which implements it. Tool facts come from each vendor’s own site. For the wider rules, see our Malaysia solar compliance guide. This page covers design tools. For general software, see solar software in Malaysia. For quotation tools, see solar proposal software in Malaysia.
Criteria used: single line diagram output, tariff and export modelling, MYR and Malay-language proposals, weather data and tropical modelling, size range against Solar ATAP limits.
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Best-For Picks for Malaysia
- MYR proposals from a vendor with a Malaysia page: Arka360. Its Malaysia page says you control “language, logos, layout, currency (MYR), and even legal terms”. It also describes financial analysis “designed for TNB tariff structures”.
- Single line diagram on every plan, up to Solar ATAP’s 1 MW ceiling: HelioScope. Its pricing page lists single-line diagrams on all plans and designs up to 1.25 MW (DC) on Basic. Solar ATAP’s limit is on inverter output, so check your ratio.
- Entering your own Malaysian tariff in a free core app: OpenSolar. Its tariff article has a Country field, flat, time-of-use and tiered rates, and net metering, net billing and buy-all-sell-all options. The core app is free (API Access and connectors are charged from 16 April 2026).
- Zero-export or capped-export yield study: PVsyst. Its documentation describes a grid power limitation setting and imports weather data from many providers. It needs Windows and does not produce proposals.
- Roof model to bill of materials and proposal in one product, priced per user: SurgePV. It documents roof modeling, shading, yield, financial modeling, bill of materials (BOM, the parts list) and proposals, priced per user in US dollars. Ask in a demo for the Malaysian drawings and tariff set-up you need. Its pricing page and published scope do not state them.
Comparison Table
Listed alphabetically. This is not a ranking; pick by the situation above. Prices checked October 2026 on each vendor’s own page. No vendor publishes a ringgit price.
| Tool | Best for | Price | Free or paid | Decisive scope fact |
|---|---|---|---|---|
| Arka360 | MYR proposals, TNB tariff templates | Not published (INR and USD plans shown, no MYR) | Paid | Malaysia page: “From 3 kW homes to 500 kW industrial sheds” |
| HelioScope | Commercial rooftops with SLD on every plan | $159 USD per license per month, or $1,620 USD per license per year (Basic) | Paid; free trial (14 days per help center) | Basic designs up to 1.25 MW (DC); Pro 5 MW; Enterprise 30 MW |
| OpenSolar | Custom Malaysian tariff in a free core app | Core app free; API Access and connectors charged from 16 April 2026 | Free core app, paid API and connectors | Recommends 3D designs under 500 kW; users have modeled up to 5 MW |
| PVsyst | Zero-export and capped-export yield study | CHF 700 per year (PVsyst 8 Professional) | Paid | Runs only under Windows; no proposal output stated |
| SurgePV | Roof model to BOM and proposal, per seat | $1,899 per user per year (1 user); no MYR price published | Paid, guided demo | BOM and proposal generation in scope; no Malaysian drawing format stated |
Malaysia Criteria Matrix
Cells read Documented when the vendor’s own pages state it. They read Partial when the pages state only part of it or state it for other countries. They read Not stated when the pages we read in October 2026 do not mention it. There are no scores or weights.
| Tool | SLD output | Tariff and export modelling | MYR and Malay proposals | Weather data and tropical modelling | Size range |
|---|---|---|---|---|---|
| Arka360 | Documented (“Electric single line diagram”; SLD Export under Premium) | Partial (“designed for TNB tariff structures”; no Solar ATAP rule stated) | Partial (“currency (MYR)”; Malay language not stated) | Partial (“8760-hour annual irradiance reports”; weather source not stated) | Partial (“3 kW homes to 500 kW industrial sheds”) |
| HelioScope | Documented (all plans) | Partial (Utility Rate Editor on Pro; no Malaysian tariff stated) | Partial (help center: currency and locale can be changed; MYR and Malay not named) | Documented (“Global weather coverage”) | Documented (1.25 MW, 5 MW, 30 MW DC) |
| OpenSolar | Partial (templates for AU, NZ, US, CA, UK, FR, DE, IT, ES and IN per help article; Malaysia not listed) | Documented (custom tariffs with compensation mechanism) | Partial (proposal languages include Thai; Malay not listed; currency not stated) | Partial (PVWatts v6 hourly TMY; SAM with 3D; Malaysian source not stated) | Partial (3D under 500 kW recommended) |
| PVsyst | Partial (editor “still work in progress”; no storage) | Documented (grid power limitation; economic evaluation with tariffs) | Not stated | Documented (Meteonorm “for any location on earth”; many import formats) | Not stated |
| SurgePV | Partial (electrical workflow support; no diagram output named) | Partial (financial modeling; no TNB tariff or Solar ATAP rule stated) | Not stated (USD price only) | Partial (shading and energy-yield modeling; weather source not stated) | Not stated |
Two things stand out. No vendor page we read states the Solar ATAP credit rules. The tools differ most on SLD output, MYR proposals and where each one stops on project size. A tool that is Not stated on a row may still do it, so ask for it in a demo.
Tool Entries
Arka360
Best for: installers and EPCs (firms that engineer, buy for and build solar projects) that want proposals in ringgit. Arka360 has written a page for Malaysia, from small homes to industrial sheds.
Not the right choice if: you need a ringgit price list. The pricing page shows rupee and US dollar plans. It is also not right if you need SLD export on a lower plan. It is listed under the Premium and Enterprise plan cards. The same goes for design above 500 kW. The Malaysia page names 500 kW industrial sheds as the upper example.
What the vendor documents: on its Malaysia page, AI-assisted 3D roof modeling “optimized for Malaysia’s residential roofs and industrial sheds”. It lists 8760-hour irradiance reports with shading. These give sunlight data for every hour of the year. It also lists custom proposals and financial analysis “designed for TNB tariff structures, hybrid systems, and battery storage integration”. The pricing page feature list adds an electric single line diagram and CAD export (Premium and Enterprise cards only). It also lists a utility rate finder and a payback and ROI report. It lists cash, loan, lease and PPA (power purchase agreement) financing too (all three plans). The same Malaysia page also lists a built-in CRM.
Price (checked October 2026): Not published in MYR. The visible US-dollar cards are Basic at $199 per month (1 user) and Premium at $358 per month (2 users). Enterprise is “Talk to Sales”. The same page also holds Indian rupee tables (for example Lite at ₹46,000 per year plus 18% GST). It has a second rupee set on its /pricing-in page and hidden dollar tables. The page does not say which applies to Malaysia, so ask for a written ringgit quote.
Limitations: the pricing page still carries a webinar banner dated 9 January 2025, so confirm current plans. The pages we read state no Solar ATAP calculation and no Malay-language proposal.
Vendor link: arka360.com
HelioScope
Best for: commercial rooftop and carport designers who want a single line diagram and CAD export on every plan. They also want a design ceiling that covers Solar ATAP’s 1 MW limit.
Not the right choice if: you need a Malay-language proposal or a proposal in ringgit. Neither is stated on the pages we read. It is also not right if you want a free tool. HelioScope is an Aurora Inc. company, per its footer, but has its own pricing.
What the vendor documents: on its pricing page, all plans list rooftop, carport, ground-mount and battery layout. They also list CAD export, single-line diagrams and an 8760 production report. Shade reports and “Global weather coverage” are listed on every plan too. Pro adds a Utility Rate Editor, financial analysis tools, customizable reports and sales proposals, and P90, P95 and P99 values. Enterprise adds single-axis trackers and export to PVsyst.
Price (checked October 2026): Basic $159 USD per license per month, or $1,620 USD per license per year on annual billing. Pro $259 USD per month, or $2,640 USD per year. Enterprise is custom per project. A license includes 1 user on Basic and Pro. The help center documents a 14-day free trial, one per customer, with Pro-level features.
Limitations: Basic designs up to 1.25 MW (DC), Pro 5 MW and Enterprise 30 MW. Solar ATAP caps non-domestic installations at 1,000 kW of inverter output, so compare DC and AC sizes. Financial tools and proposals start at Pro. HelioScope’s help center says you can set a default currency for financial data (“USD, EUR, etc.”). It also says a report’s currency and locale can be changed. We found no Malaysian tariff or MYR mention there.
Vendor link: helioscope.aurorasolar.com
OpenSolar
Best for: small teams that want to enter a Malaysian tariff themselves in a core app the vendor describes as free.
Not the right choice if: your approving engineer expects an SLD from a template for Malaysia. It is also not right if you need a Malay-language proposal. OpenSolar’s help article lists SLD templates for AU, NZ, US, CA, UK, FR, DE, IT, ES and IN. Its SLD page lists AU, US, UK, DE, IT and ES. Malaysia is on neither list.
What the vendor documents: a custom tariff with a Country field and flat, time-of-use, tiered and demand rates. The tariff also has a compensation mechanism. It can be net billing, net billing with credit carryover, buy all sell all, or net energy metering. OpenSolar recommends sending the customer’s bill to its support team to build the tariff. Its proposal language article lists 13 languages including Thai but not Malay. Output uses PVWatts version 6 at hourly resolution or the System Advisor Model with 3D shading, per its help article.
Price (checked October 2026): the core app is free of charge for solar professionals, per the vendor (free page). From 16 April 2026 the vendor charges for API Access, a per-project fee. The per-project API fee is on OpenSolar’s API page. It also charges for supported connectors, a monthly fee per organization. The 16 February 2026 post says accounting connectors are billed as a monthly fee per organization. We did not compare those fees. Optional paid Enterprise Services: Support US$500 per month, Customize US$1,350 per month, Enterprise custom. Premium imagery is pay per image (price shown in the app).
Limitations: its commercial design article recommends keeping 3D designs under 500 kW. It also says users have modeled systems up to 5 MW by simplifying settings. We did not find a Malaysia page or a Solar ATAP template on the pages we read.
Vendor link: opensolar.com
PVsyst
Best for: yield studies where you must model a limit on injected power, such as a SELCO design. It also suits you if you want weather data from a choice of providers.
Not the right choice if: you need proposals, bills of materials or a roof model from the same tool. It is also not right if you work on a Mac or in a browser. The requirements page says it runs only under Windows.
What the vendor documents: a grid power limitation applied at inverter level. It also lists Meteonorm data, which its help page describes as monthly data “for any location on earth”. It also lists import of PVGIS and other weather sources. It has an economic evaluation with tariffs, ROI, payback and NPV (net present value), including a feed-in tariff and self-consumption page). It also has a single line diagram editor.
Price (checked October 2026): CHF 700 per year for PVsyst 8 Professional. Discounts are 5% off for 2 to 4 licences, 15% for 5 to 9 and 20% for 10 or more. No ringgit price is published (CHF).
Limitations: the single line diagram feature is described as “still work in progress”. It covers strings, inverters and transformers, and does not include storage. The vendor pages we read do not say which Malaysian lenders or authorities accept its reports.
Vendor link: pvsyst.com
SurgePV
SurgePV is our product.
Best for: teams that want roof modeling, array layout, shading analysis and energy-yield modeling. They also want financial modeling, electrical workflow support, bill-of-materials output and proposal generation in one product, priced per user. They should confirm the Malaysian outputs in a demo. See solar design software for the product page.
Not the right choice if: you want a self-serve trial (SurgePV offers a guided demo). It is also not for you if you need a ringgit price in writing before talking to sales. The pricing page lists USD per user per year for visitors outside India. It is also not for you if you want a vendor Malaysia page with MYR proposals and TNB tariff structures. Arka360 publishes one. Outputs support design and documentation but do not replace approval by the responsible engineer, authority, lender or utility. SurgePV’s published product scope does not list a CRM. It is not a monitoring or ERP (business planning) product.
What the vendor documents: 3D roof modeling, array layout, shading analysis, energy-yield modeling, financial modeling, electrical workflow support, bill-of-materials output and proposal generation.
Price (checked October 2026): $1,899 per user per year for 1 user, $1,499 per user for 3 seats, $1,299 per user for 5 seats, in US dollars. Confirm any ringgit amount and taxes in a written quote.
Limitations: results depend on source data, assumptions and equipment models. The pricing page and published scope do not state a TNB or Solar ATAP drawing format, a Solar ATAP credit calculation, or a design size limit.
Vendor link: surgepv.com.
Malaysia Rules That Shape the Choice
Which scheme applies. SEDA’s NEM page says the NEM 3.0 quota offer ran until 30 June 2025 or until all quotas were allocated. SEDA’s Solar ATAP page calls Solar ATAP “a continuation of the Net Energy Metering (NEM) Programme, which concluded at the end of June 2025”. It also says the scheme starts on 1 January 2026 in Peninsular Malaysia. A press report reposted on SEDA’s site (The Star, 2 July 2025) says more than 96,000 existing users keep their credits. A page or tool that offers “NEM 3.0 modelling” for a new project is describing a closed scheme.
Size limits. Under the Energy Commission’s Solar ATAP guidelines (GP/ST/No. 60/2025), domestic consumers can install up to 5 kW on single phase and 15 kW on three phase. Larger systems need a Connection Confirmation Check (CCC). Non-domestic consumers can install up to 100% of Maximum Demand, subject to network studies, with a limit of 1,000 kW. Maximum Demand is twice the most kilowatt-hours used in any consecutive thirty minutes in a month. SEDA lists study fees. The fee is RM 1,000 for more than 72 kW to 180 kW. It is RM 5,000 for more than 180 kW to 425 kW. It is RM 8,000 for more than 425 kW to 1 MW. On SEDA’s page, TNB or its appointed consultant runs these studies. They set the technical and safety requirements and decide if the connection is feasible. The page also lists a Connection Assessment Study (CAS) and a Power System Study (PSS).
How exports are credited. The guidelines credit domestic exports at the applicable Energy Charge. They credit non-domestic exports at the monthly Average SMP. The guidelines define the Energy Charge as the part of the TNB tariff that covers the cost of generating electricity. They define SMP as the System Marginal Price. This is the price of the most expensive generator running to meet demand in a half-hour period. Credits offset imports in the same Billing Period. They are not carried forward. The credit cannot offset the Automatic Fuel Adjustment. Exports are credited only up to the lower of two figures. One is the Maximum Allowable Quantity (MAQ). The other is the electricity consumed from the utility. The excess is forfeited. The guidelines define MAQ as capacity in kWac × 5 sun hours × the Billing Period. So a 100 kWac system in a 30-day Billing Period has an MAQ of 100 × 5 × 30 = 15,000 kWh. Enter these rules into whichever tool you pick, because we found none that states them.
Documents for the application. The ST (Energy Commission) guidelines list a single line diagram endorsed by a Competent Person and a Qualified Person. They also list an endorsed C&S drawing and the latest electricity bill. For larger systems, they list the CAS or PSS approval. SEDA’s Solar ATAP page adds Form G and Form H, with the single line diagram and test results attached. Applications go through SEDA’s eATAP system, and the applicant appoints a Registered PV Service Provider. Our TNB connection guide describes the TNB side in more detail.
Self-consumption instead of export. SEDA describes SELCO as generation for own use where any excess is not allowed to be exported. Our SELCO guide covers the process.
Incentives. SEDA’s Solar ATAP FAQ says eligible companies can claim the Green Technology Incentive from MIDA. The vendor pages we read do not mention it.
Regulator pointer. The Energy Commission (st.gov.my) regulates Solar ATAP, and SEDA Malaysia implements it. Sabah and Sarawak are outside the Peninsular Malaysia guidelines above.
How We Ordered These Tools
We did not rank these tools. They are listed alphabetically, and the best-for picks come from the matrix above.
- SLD output: the Solar ATAP application requires a single line diagram endorsed by an engineer. We did not assess whether any tool’s diagram passes endorsement or TNB review.
- Tariff and export modelling: the credit basis changes the savings a customer sees. We did not assess whether any calculation is correct.
- MYR and Malay proposals: a ringgit proposal is what a Malaysian customer reads. We did not assess translation quality or tax lines.
- Weather data and tropical modelling: yield depends on the weather file and temperature treatment. We did not assess accuracy against measured generation.
- Size range: Solar ATAP stops at 1,000 kW for non-domestic consumers, so a tool’s ceiling matters. We did not assess speed on large designs.
Not Compared Here
Aurora Solar, PVcase and PV*SOL premium are compared on the global solar design software list but not on this page. Web Solar Cloud appeared in our search for Malaysian tools. It is not compared, because its home page, read October 2026, does not mention Malaysia. Regional design lists are available for Thailand and Indonesia.
Sources and Dates
Vendor pages were read in October 2026. Arka360 (Malaysia, pricing). HelioScope (pricing). OpenSolar (pricing post, 16 February 2026, SLD page, three help center articles linked above). PVsyst (shop and the help pages linked above). SurgePV (pricing). Local rules come from the Energy Commission guidelines (in force 1 January 2026). They also come from SEDA’s NEM, Solar ATAP and SELCO pages, all linked above. TNB’s myTNB site returned 403 to our automated requests. So TNB-side steps here come from SEDA and the Energy Commission, not from TNB’s own pages.
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Frequently Asked Questions
What is the best solar design software in Malaysia?
It depends on the job. Here is what the vendors publish. Arka360 has a Malaysia page that names MYR proposals and TNB tariff structures. HelioScope documents a single line diagram (SLD, a simple drawing of how the system is wired) on every plan. It designs up to 1.25 MW DC on its entry plan. OpenSolar’s core app is free and lets you enter a custom tariff. The vendor charges for API Access and supported connectors from 16 April 2026. PVsyst documents grid power limitation and an economic evaluation. SurgePV documents roof modeling, shading, yield, financial modeling, bill of materials and proposals in one product, priced per user.
Does solar design software support NEM 3.0 or Solar ATAP in Malaysia?
NEM 3.0 is the earlier Net Energy Metering scheme. It is closed to new applicants. SEDA says its quota offer ran until 30 June 2025. Solar ATAP, which SEDA calls a continuation of NEM, started on 1 January 2026 in Peninsular Malaysia. None of the vendor pages we read describe a Solar ATAP calculation. So check that the tool lets you enter the credit basis. It is the Energy Charge for domestic consumers and the monthly Average SMP for non-domestic consumers.
Do SEDA or TNB require specific design software?
The Energy Commission guidelines for Solar ATAP name documents, not software. An application needs a single line diagram endorsed by a Competent Person and a Qualified Person. It also needs an endorsed C&S drawing and the latest electricity bill. It needs any required CCC (Connection Confirmation Check) or CAS (Connection Assessment Study) approval too. Any tool is acceptable if it produces drawings that your engineer can check and endorse.
Can solar design software produce the single line diagram for a Solar ATAP application?
Some tools document a single line diagram. HelioScope lists single-line diagrams on every plan. Arka360 lists an electric single line diagram. PVsyst has a single line diagram editor that it calls work in progress. OpenSolar’s help article lists templates for AU, NZ, US, CA, UK, FR, DE, IT, ES and IN, not Malaysia. The diagram still needs endorsement before submission.
How much does solar design software cost in Malaysia?
No vendor on this list publishes a ringgit price. HelioScope Basic is $159 USD per license per month or $1,620 USD per license per year. PVsyst 8 Professional is CHF 700 per year. OpenSolar’s core app is free, but the vendor charges for API Access and supported connectors from 16 April 2026. SurgePV Individual is $1,899 per user per year. Arka360 shows rupee and US dollar plans and says nothing about MYR. So ask each vendor for a written quote in ringgit.
Which tool can model a zero-export SELCO system?
SEDA describes SELCO as generation for own use where any excess is not allowed to be exported. PVsyst documents a grid power limitation setting applied at inverter level. The other vendor pages we read do not describe an export limit. So ask for a demonstration with your own load profile.
