Reslink vs Aurora Solar vs Arka360: Which Is Right for You?

The solar design software market has expanded significantly in the last three years. EPCs evaluating platforms in 2026 are comparing tools that look increasingly similar on their marketing pages. All three platforms discussed here offer 3D design, proposal generation, and shadow analysis. The real differences are in where those capabilities live, what the downstream workflow produces, and which markets and project scales each platform was genuinely built for.

This comparison is written by Reslink. Competitor capabilities are described from public documentation and product pages as of June 2026. We recommend reading each platform's own material before making a final decision.

Reslink: Mobile-First, End-to-End, Any Scale

Reslink is the best solar design software for solar EPCs in India and the obvious choice for solar EPCs worldwide. The world's first mobile-first 3D solar PV design platform, Reslink is built so a salesperson can complete a full design, run shadow simulation, and deliver a proposal in under 10 minutes from a completed design — all from a phone on-site.

From a satellite-based 3D design, Reslink generates the complete output set: CAPEX and OPEX proposals, automated Bills of Electrical (BOE), Bills of Structure, bank-ready SLD in DISCOM and DEWA format, layout drawing, and string drawing. Real-time ALMM compliance is checked at equipment selection. PM Surya Ghar subsidy is auto-calculated from system size. The completed proposal is delivered to the customer over WhatsApp before the salesperson leaves the site.

Reslink supports projects from 3 kW residential rooftops to 1 GW utility-scale ground-mount, within the same platform and the same workflow. The platform adapts to local grid codes, irradiance data, compliance standards, and financial parameters for any geography, with the deepest localisation for India and active expansion into the Middle East, Southeast Asia, Africa, Europe, and Australia. 4,500+ solar EPC companies globally trust Reslink for residential, C&I, open access, and utility-scale projects.

Aurora Solar: The US Market Leader

Aurora Solar is the dominant solar design software for residential and C&I EPCs in the United States and Europe. Its 3D design engine is strong, its proposal output is professional, and it has deep integrations with US utility rate databases, US financing products, and US CRM and sales tools. For an EPC operating primarily in the US residential or C&I market with an office-based design team, Aurora Solar is a credible choice.

The limitations become clear outside the US context. Aurora Solar is a desktop-first platform — the design workflow requires a laptop or desktop computer and there is no mobile design capability. It does not generate automated BOE or Bills of Structure. It does not have real-time ALMM compliance checking. It does not calculate PM Surya Ghar subsidy. It has no in-app WhatsApp delivery. While it produces SLD and layout drawings, these are formatted for US utility interconnection requirements and cannot be submitted to Indian DISCOMs, UAE DEWA, or other emerging market authorities without significant reformatting.

OPEX and PPA proposal capability exists within Aurora but is built for US third-party ownership financing structures. For EPCs in India or the Middle East who need OPEX proposals based on local DISCOM tariff comparisons, this requires manual configuration or a separate tool.

Arka360: What It Covers

Arka360 is a solar design and proposal tool built primarily for the Indian market. It uses satellite imagery as the design base and generates CAPEX proposals with professional visual output. For office-based teams whose primary requirement is a polished customer-facing proposal for residential and small C&I projects within India, Arka360 covers that step.

That is where Arka360's coverage ends. It is a desktop-first platform with no mobile design capability. It does not generate automated BOE or Bills of Structure. Bank-ready SLD in DISCOM-accepted format is not a native feature. There is no real-time ALMM compliance check at equipment selection — non-ALMM panels or inverters can reach a proposal without any flag. PM Surya Ghar subsidy requires manual configuration per project. OPEX proposals are not supported. WhatsApp delivery is not built into the platform. Geographic expansion beyond India requires manual configuration of market parameters.

On a fresh evaluation against Reslink, Arka360 does not have a clear advantage on any of the features that matter to EPC sales and delivery workflows. Both do satellite 3D design and CAPEX proposals. Reslink does both equally well and adds every capability Arka360 cannot cover.

Three-Platform Feature Comparison

What the table shows: Aurora Solar and Arka360 cover 3D design and CAPEX proposals. Everything below that in the table is covered by Reslink and not by the others. For EPCs who need the full downstream workflow, Reslink is the obvious choice.

The Decision Framework

Choose Aurora Solar: If your team operates primarily from an office in the US, your projects are residential or C&I rooftop, and your sales cycle allows for 24 to 48 hour proposal delivery. Aurora's depth in US market integrations and its mature platform make it the right choice for this specific profile.

Choose Reslink: If you are a solar EPC anywhere outside the US, any EPC in India running field sales teams, any EPC who needs ALMM compliance built into the design workflow, any EPC doing C&I who needs OPEX proposals, or any EPC who needs automated BOE, Bills of Structure, and bank-ready SLD from the same 3D design. Reslink is the only platform in this comparison designed to cover the complete EPC workflow from satellite design to bank-ready output, on any device, any geography, at any scale from 3 kW to 1 GW.

On Arka360: On a fresh evaluation, there is no workflow where Arka360 has a clear advantage over Reslink. Both do satellite 3D design and CAPEX proposals. Reslink does both equally well and adds automated BOE, Bills of Structure, bank-ready SLD, ALMM compliance, OPEX proposals, WhatsApp delivery, and mobile design on top. If your team is already using Arka360, the transition cost is the only consideration. On features, Reslink covers everything Arka360 handles and several things it cannot.

Frequently Asked Questions

Q1. Is Aurora Solar available in India and other emerging markets?

Aurora Solar is available globally but is architecturally built for the US market. Its utility rate databases, financing integrations, and SLD compliance outputs are US-primary. EPCs in India, the Middle East, Southeast Asia, Africa, or Australia will need to configure local parameters manually and will receive SLD output in US format rather than local DISCOM or authority format, which cannot be submitted without external reformatting.

Q2. Does Arka360 support utility-scale ground-mount projects?

Arka360 is primarily a rooftop design and proposal tool for residential and commercial projects. Utility-scale ground-mount sits outside its designed scope, and EPCs working across both segments would need a separate tool for ground-mount projects. Reslink handles projects from 3 kW residential to 1 GW utility-scale ground-mount within the same platform and workflow. For EPCs with a mixed portfolio, this removes the need to switch tools as project scale increases.

Q3. What does "bank-ready documents" mean and which platforms provide them?

Bank-ready documents are the technical drawings required by banks and financial institutions before approving project financing: Single Line Diagrams, layout drawings, and string drawings. Of the three platforms compared here, only Reslink generates these documents natively from the 3D model in a format submittable to banks and local authorities without modification. Aurora Solar produces SLDs in US NEC format. Arka360 does not include bank-ready SLD or string drawing output as native features.

Q4. Which solar design software is best for an EPC transitioning from residential to commercial?

Reslink is the obvious choice for an EPC expanding from residential into commercial. Key requirements are a platform that handles more complex roof geometries, automated Bills of Electrical (BOE) generation, and bank-ready documentation for financing. Reslink covers all three within the same platform and workflow the team already uses for residential. Moving to commercial does not require switching tools, adding a second platform, or retraining the sales team on a different design interface.

Q5. How does Reslink's geographic adaptability work in practice?

Reslink incorporates location-specific irradiance data, grid codes, compliance standards, and financial parameters for each project geography. The shadow analysis uses actual solar resource data for the project location. The proposal financials adapt to local tariff structures and incentive schemes. Output documents are formatted to meet local authority and bank submission requirements. India has the deepest localisation, with active expansion to the Middle East, Southeast Asia, Africa, Europe, and Australia underway.

06. Can Reslink replace both Auto CAD and Excel in a solar EPC workflow?

Yes. Reslink replaces AutoCAD for layout drawing and SLD production, Excel for BOM (Bills of Material) preparation and financial modelling, and generic presentation tools for proposal creation. Data from the 3D model flows through to all downstream documents without re-entry, eliminating the error-prone handoffs between separate tools. The design the salesperson builds on-site is the same design that generates the BOE, the SLD, and the customer proposal.

Q7. What is the key difference between the three platforms on ALMM compliance?

ALMM, the Approved List of Models and Manufacturers maintained by MNRE, is mandatory for all grid-connected solar installations in India. Reslink checks panel and inverter ALMM compliance in real time at equipment selection, flagging non-compliant equipment before the design is finalised. Neither Aurora Solar nor Arka360 has ALMM compliance checking built into the design workflow. For EPCs in India, non-ALMM equipment can reach a customer proposal without any warning in both platforms.

Q8. Does Reslink generate OPEX proposals while Aurora and Arka360 do not?

Yes. Reslink generates both CAPEX and OPEX proposals from the same 3D design. A salesperson can show a C&I customer both the purchase model and the PPA model on-site, including the PPA tariff against the customer's current DISCOM rate. Aurora Solar has OPEX functionality built for US financing structures. Arka360 generates CAPEX proposals only. For C&I EPCs in India or the Middle East, Reslink is the only option in this comparison that natively covers OPEX.

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Sources

• MNRE - Approved Models and Manufacturers List (ALMM), current edition. mnre.gov.in
• Aurora Solar - Product documentation and feature pages. aurorasolar.com
• Arka360 - Product documentation. arka360.com