The Complete Indian Solar Installer Software Stack

Most Indian solar installers run their business on a dangerous combination of WhatsApp, a shared Excel sheet, and memory. We've worked out the exact rupee cost of running on spreadsheets for a typical EPC, and the number surprises most owners. That works for your first 5–10 projects a month. Beyond that, things fall apart: proposals get re-quoted at wrong prices, leads go cold because nobody followed up, and DISCOM documentation sits half-filled in someone's Downloads folder.

The good news: a functional software stack for an Indian solar EPC doesn't require enterprise SaaS or a ₹5 lakh implementation. It requires 5 layers, each solving a specific job, and for most small-to-mid EPCs, 2–3 of those layers can be covered by a single India-built tool.

This guide covers each layer with specific tools, honest trade-offs, and ₹ costs. It's written for a 12-person EPC owner (an illustrative reader) who is moving off WhatsApp and Excel and wondering which tools fit an Indian solar business. It's also relevant to solar dealers managing multiple sub-installers who need their partners standardised on a single stack.

The 5-Layer Solar Tech Stack, overview

The framework organises every software need for an Indian solar installer into five distinct jobs:

1. 1

   Proposal Layer, Quote, generate, and deliver proposals

   The job: turn a lead's name, address, and system size into a professional PDF with PM Surya Ghar subsidy calculated, payback period shown, and your brand visible.

2. 2

   CRM Layer, Track leads from first contact to commissioning

   The job: know where every lead is in your pipeline, who is following up, and which deals need action today.

3. 3

   Site Survey Layer, Capture roof data accurately in the field

   The job: measure roof area, assess shading, photograph the meter and roof structure, and feed data directly into the proposal, no re-entry.

4. 4

   Finance Layer, Customer EMI, bank loan facilitation, GST billing

   The job: help customers finance solar with a bank loan or EMI; generate GST-compliant invoices; manage your own working capital.

5. 5

   Compliance Layer, DISCOM documentation, PM Surya Ghar portal, net metering

   The job: generate DISCOM-ready documents, track inspection status, and upload subsidy applications without document errors that cause rejection.

Layer 1, Proposal tools for Indian solar installers

The proposal is the first physical thing a prospect sees from your company. If yours looks handwritten, takes days to arrive, or has the wrong subsidy number, you give the customer a reason to look elsewhere.

What the best proposal tools for India must do:

• Apply the PM Surya Ghar subsidy correctly (₹30,000 for 1 kW, ₹60,000 for 2 kW, ₹78,000 for 3 kW and above, per the MNRE guidelines of July 2025, which also give the rate for special category states)
• Show payback period and generation forecast in Indian units (units/day, ₹ savings/month)
• Generate a branded PDF you can share on WhatsApp
• Work on an Android phone
• Support custom pricing and equipment selection

The honest verdict: Aurora Solar is strong for 3D roof modelling and shade analysis on complex commercial projects. For simple residential and small commercial work it may be more than you need, it is priced in USD, and it is not built around PM Surya Ghar. Quickest Solar CRM is built and supported in Surat for Indian installers: its Proposal Generator makes a branded PDF from your template with the PM Surya Ghar subsidy applied, and you share it on WhatsApp from the mobile app.

For more on what makes a strong solar proposal, see our guide on how to write a solar proposal in India and solar proposal best practices.

Layer 2, CRM tools for solar lead tracking

A CRM (Customer Relationship Management) system for solar does one job: make sure every lead gets followed up, every proposal gets a response, and every closed deal gets properly handed to the installation team without a phone call chain.

What Indian solar CRMs must handle:

• Lead source tracking (Facebook Ads, IndiaMART, referral, DISCOM camp)
• Pipeline stages that map to solar sales: Inquiry → Site Visit → Proposal Sent → Negotiation → Closed → Under Installation → Commissioned
• Mobile-first interface (your sales team is in the field, not at a desk)
• An easy way to share proposals and follow up on WhatsApp
• Multi-user with role-based access (owner sees all, sales rep sees their own leads)

The global CRM leaders (Salesforce, HubSpot, Zoho CRM) are built for generic B2B sales cycles. They can be configured for solar, but the solar-specific pipeline stages, PM Surya Ghar subsidy tracking, and WhatsApp-first communication model need custom setup. Generic CRMs need setup before they fit a solar pipeline, so ask any vendor what that involves.

In Quickest Solar CRM, Pipeline Management gives you customisable lead stages, labels and follow-up reminders, and you can filter leads and log activities. In Lead Capture you add leads and edit them, or bulk import from Excel. The margin impact of consistent follow-up is easy to work out. As illustrative arithmetic only: if a close rate rose from an assumed 15% to an assumed 25% on 50 monthly leads, that is 5 extra projects, and at an assumed ₹1.75 lakh revenue each, ₹8.75 lakh.

Layer 3, Site survey tools for field data collection

The site survey is where most EPC errors originate. An installer visits a roof, takes rough measurements, photographs the meter with a personal WhatsApp message, and then... someone at the office tries to reconstruct the system design from incomplete notes. Errors in roof area, shading, or meter capacity then cause proposal re-work and installation surprises. Teams that pair ground measurements with drone-based aerial roof surveys tend to catch these errors before they ever reach the proposal stage.

What a good site survey tool does:

• Structured form with required fields (roof dimensions, roof type, shading assessment, meter capacity, existing load)
• Photo capture with automatic naming and project linkage
• GPS tagging of the installation site
• Direct data flow into the proposal tool (no re-entry)
• Works offline with sync when connected

For Indian EPCs, the most practical Layer 3 option is a Google Form with photo upload linked to a Drive folder, free, works on any Android phone, and keeps surveyor data in one place. The limitation is no direct integration with proposal tools. Dedicated site survey apps exist, but we have not reviewed them for Indian use. If you'd rather standardise your own form, a structured 24-point field checklist covers the fields most Indian EPCs forget to capture.

Layer 4, Finance tools for customer loans and GST billing

Solar is a large purchase for a household, so many customers ask about a loan. Be ready to explain the options, and keep your own records of how finance offers change your close rate.

What the Finance Layer covers:

Customer loan facilitation: for PM Surya Ghar households, a collateral-free loan is available at repo + 50 basis points, "5.75% per annum for the present" with a 10-year tenure (PIB, 28 July 2026). SBI's PM Surya Ghar loan page (updated 19 October 2026) says disbursement goes directly to the vendor after feasibility reports. Ask each lender for its current terms; other banks and state schemes have their own.

GST billing: Solar system installation attracts GST. As per the CBIC notifications effective 22 September 2025, renewable energy devices and complete solar systems are taxed at 5% (down from 12%), and a complete EPC contract follows the 70:30 rule: 70% deemed goods at 5%, and 30% deemed service under entry 38 of notification 11/2017-CT(Rate), at 9% CGST or 18% IGST (8.9% blended is arithmetic for an inter-State supply). Ask your CA about the rate on separately billed items. Generating correct GST invoices requires an accounting tool or GST-compliant billing software. For a full breakdown of the SAC code and ITC rules for solar GST, see our dedicated guide.

Tools to consider:

• Zoho Books / Tally Prime: GST invoicing and accounts payable/receivable. Check each vendor's pricing page and ask whether it supports e-invoice reporting.
• GST portal: for filing returns. Ask your CA which invoicing tool fits your volume.
• Excel with GST formulas: functional at low volume, breaks down at scale. See our guide on managing tax with Excel for solar businesses for specific templates.

Layer 5, Compliance tools for DISCOM and PM Surya Ghar

The compliance layer is uniquely painful for Indian solar EPCs. Every state has a different DISCOM, each DISCOM has different net-metering forms, and PM Surya Ghar adds a separate portal with its own documentation requirements. Getting familiar with the net-metering application steps DISCOMs expect before you file cuts down on back-and-forth with the utility considerably. Getting this wrong delays commissioning, and delays mean your customer calls you every week. Knowing the six-phase DISCOM approval timeline in advance is the single best way to set correct expectations with customers upfront.

What the Compliance Layer covers:

• DISCOM net-metering application forms (state-specific)
• PM Surya Ghar vendor portal upload of commissioning documents
• Inspection tracking (DISCOM inspection → BESCOM / MSEDCL / DGVCL sign-off)
• Subsidy disbursement status tracking for customer communication

Available tools:

Most Indian EPCs don't have purpose-built compliance software. The current best practice is a combination of:

1. State DISCOM portals: Each DISCOM has an online portal for net-metering applications. Examples: MSEDCL (Maharashtra), BESCOM (Bengaluru), DGVCL (Gujarat). Status updates and document upload happen here.
2. PM Surya Ghar National Portal: pmsuryaghar.gov.in for vendor registration, application tracking, and commissioning document upload.
3. Google Sheets compliance tracker: A shared sheet where each project has a row tracking DISCOM application date, inspection date, net-metering meter installation, and subsidy status. Crude, but functional for sub-30-project teams.

In Quickest Solar CRM, lead stages are customisable, so you can add stages for installation and commissioning and use a stage to mark DISCOM status. You still do the DISCOM and portal work yourself. The full guide to PM Surya Ghar vendor registration covers the portal steps in detail.

The full Indian solar installer stack, costs and coverage

Let's assemble the stack for an illustrative 15-person Indian EPC. Only the Quickest Solar CRM price below is ours; check every other vendor's current pricing.

Cost for the layers we can price: Quickest Solar CRM Pro for 3 users is about ₹1,750 a month averaged over the year, and Google Forms is free. Add your accounting software's price from its vendor page to get your own total.

What to think about before adding each layer

New tooling creates adoption overhead. Teams that try to implement 5 layers at once rarely stick to any of them. A better sequence:

Month 1–3: Layer 1 (proposal) + Layer 2 (CRM). These two are the highest-use changes for any EPC under 30 projects/month. Standardised proposals reduce rework. Pipeline visibility prevents lead leakage. Quickest Solar CRM covers both natively, start with the free plan to confirm team adoption before upgrading.

Month 4–6: Layer 3 (site survey). Once Layer 1 and 2 are running, you'll start seeing where the next bottleneck is. For most EPCs, it's survey data quality.

Month 6+: Layer 4 (GST billing, loan integration). Only matters once your transaction volume makes manual invoicing painful.

Layer 5 (compliance) should be built as you grow, start with a shared Google Sheet, graduate to structured tracking inside your CRM pipeline stages as project volume increases.

How Quickest Solar CRM fits your solar software stack

Quickest Solar CRM was built specifically for the Indian solar market. It wasn't adapted from a generic CRM or a Western solar tool. Proposals apply the PM Surya Ghar subsidy, and proposal PDFs are shared on WhatsApp, so you spend less time on setup.

• Proposal Generator, PM Surya Ghar subsidy applied in the proposal; branded PDF from your template; share it on WhatsApp.
• Pipeline Management, customisable lead stages (for example Inquiry → Site Visit → Proposal Sent → Closed → Commissioning); team members with permissions.
• Lead Capture, add and edit leads, bulk import from Excel, and filter leads.
• Sales Reports, dashboard and team report.

If you work with dealers or sub-installers, see the solar dealer empanelment guide; in the CRM you add team members with permissions. For wider context, the India solar business trends report covers industry trends.

What to do this week

1. Audit your current stack against the 5 layers. Draw a simple table: which layer, which tool (if any), and whether it's actually being used by your team. Be honest about Layer 2, if your CRM hasn't had a log entry in the last 7 days, it's effectively unused.

2. Fix the proposal layer first. Install Quickest Solar CRM, create a 3 kW sample proposal for your city, and time how long it takes. If it's over 5 minutes, you have your baseline. Now send it to a prospect and track what happens. Start free at quickestimate.co.

3. Set up a basic site survey form for Layer 3. Even a Google Form with 8 fields (customer name, address, roof type, roof area, shading, meter capacity, existing monthly bill, photos) cuts proposal re-work. Build it in about half an hour and send the link to your field team today. See more on optimising your full workflow in the India Solar Sales Report.

Frequently asked questions

What software does a solar installer in India actually need?

At minimum, you need two things: a proposal tool and a lead tracking system. The proposal tool should apply the PM Surya Ghar subsidy and give you a shareable PDF from a phone. The lead tracker should show you every lead's stage and follow-up status in a single dashboard. Quickest Solar CRM covers both. As you scale past 20 projects/month, add a site survey form (Layer 3) and GST billing software (Layer 4).

Is Zoho CRM good for Indian solar installers?

Zoho CRM is a capable tool but it's built for generic B2B sales teams. We did not review its solar setup, so ask Zoho what configuration your pipeline needs, and compare it with a solar-specific tool such as Quickest Solar CRM, which has customisable lead stages and proposals with the PM Surya Ghar subsidy applied.

What does solar proposal software cost in India?

Quickest Solar CRM's Free plan includes 1 user and 10 proposals a month with no card, and Pro is ₹6,999 per user per year with a 3-user minimum (₹20,997 for 3 users), billed yearly with a GST invoice. For overseas tools such as Aurora Solar or Solargraf, check the vendor's pricing page, which is in US dollars.

Do I need a separate tool for PM Surya Ghar subsidy calculation?

Not in Quickest Solar CRM: the PM Surya Ghar subsidy is applied in the proposal. For manual calculation, the central assistance is ₹30,000 for 1 kW, ₹60,000 for 2 kW, and ₹78,000 for 3 kW and above (MNRE guidelines, July 2025; special category states have higher rates). See the PM Surya Ghar subsidy slabs guide for the full schedule.

What is the best CRM for small solar companies in India?

For small installers, a good fit is a CRM with solar proposals, simple lead stages and a mobile app. Quickest Solar CRM offers customisable lead stages, proposals with the PM Surya Ghar subsidy applied, WhatsApp sharing of the proposal PDF, and Android, iOS and web apps. Larger EPCs needing more complex reporting may evaluate a generic CRM with solar configuration; ask each vendor what setup involves.

How do I track DISCOM approvals and commissioning status?

Most Indian EPCs use a Google Sheet or the DISCOM portal itself for commissioning tracking. Each state DISCOM (MSEDCL in Maharashtra, BESCOM in Karnataka, DGVCL in Gujarat) has an online portal where application status is updated. Quickest Solar CRM's pipeline stages can be customised to include post-sale stages like DISCOM Application Submitted, Inspection Scheduled, and Commissioned.

What is the cheapest way to build a solar software stack in India?

The lowest-cost functional stack uses: Quickest Solar CRM Free plan (1 user, 10 proposals a month, ₹0), Google Forms for site survey (₹0), and a spreadsheet invoice template your CA has reviewed (₹0). Total monthly cost: ₹0. As you grow, move to Quickest Solar CRM Pro (₹6,999/user/year, 3-user minimum) and add accounting software for GST billing.