Solar Commissioning Process in India: Steps & DISCOM Checks

The panels are on the roof. The inverter is wired. The earthing is done. But you are not finished, you are at the start of the most bureaucratically complex phase of every solar project in India.

The solar commissioning process begins the moment your installation crew packs up and ends only when the bidirectional net meter is running, the system is officially energised, the commissioning certificate is in hand, and the customer understands how to read their generation data. Everything in between involves Electrical Inspectors, DISCOM Junior Engineers, application portals, government offices, and timelines that vary by state, subdivision, and sometimes by the individual officer handling your file.

This guide gives you a complete playbook for the solar commissioning process in India. It covers every stage in the correct sequence, the documents required at each step, the official clocks for Gujarat, Maharashtra, and Karnataka that we could open, the most common delays and how to prevent them, and how to track commissioning status across 20 or more simultaneous projects without losing your mind, or your margin.

Official sources used: MNRE's PM Surya Ghar guidelines{target="_blank" rel="noopener"}, the PM Surya Ghar national portal documentation{target="_blank" rel="noopener"}, the Ministry of Power's Electricity (Rights of Consumers) Rules as amended on 22 Feb 2024, the CEA Safety Regulations 2023, and the state regulators' rules cited in each section.

Why Commissioning Is Where EPC Businesses Win or Lose

Most EPC owners think of their project timeline as: lead → proposal → deal → installation → done. The reality is that "done", meaning energised, metered, and generating, comes only after several DISCOM steps. The central Rights of Consumers Rules (amended 22 Feb 2024) give the DISCOM 15 days after your installation certificate to sign the agreement, fit the meter and commission, but your state may add steps.

For a scaling EPC with a team of a dozen, that gap compounds in three painful ways.

Working capital lock-up. If your payment terms require 10–15% of the project value on commissioning, every day of delay is a day your receivable sits uncollected. On an illustrative ₹3 lakh residential system, that is ₹30,000–45,000 per project stuck in the commissioning pipeline. Multiply by 20 active projects and you are looking at ₹6–9 lakh in locked working capital, enough to affect your ability to fund new installations. Pegging that last instalment to commissioning proof, as set out in our guide to payment terms for solar customers, keeps the amount collectible.

Customer anxiety management. A customer whose system is installed but not generating pays attention to the timeline in a way that pre-installation customers do not. They check the roof. They ask neighbours. They message you every four days. Without a structured commissioning communication process, this leads to negative reviews and failed referrals.

Subsidy disbursement timing. Under PM Surya Ghar, the consumer updates the installation details and geo-tagged photographs on the national portal, the DISCOM inspects, and the CFA is processed only after that inspection, within 15 days of the DISCOM's approval (MNRE guidelines, clauses 6(j), 6(k), 6(t)). Every day the commissioning process slips is a day your customer's ₹78,000 subsidy slips, and they blame you, not the DISCOM.

Understanding the net metering application timeline by state is the foundation on which a good commissioning workflow is built. But the net metering application is only one of seven stages in the full commissioning process.

The 7 Stages of the Solar Commissioning Process in India

1. 1
   Electrical Inspector Certificate (EIC) Application

   Owner: EPC Installer | Duration: set by your state

   Whether an Electrical Inspector certificate is required depends on the capacity threshold your state notifies. The CEA (Measures relating to Safety and Electric Supply) Regulations, 2023 let owners self-certify installations at or below the notified voltage and leave the capacity above which generating units are inspected to the appropriate government (regulation 34). Examples: Telangana needs a CEIG certificate above 56 kWp, with CEIG acting within 15 working days (TGERC Regulation 1 of 2025); Gujarat's regulation has the Chief Electrical Inspector approve the SLD, earthing and wiring diagram within 10 days of a complete application (GERC Fourth Amendment, 2024); Maharashtra's MSEDCL SoP (2022) asks for self-certification with a licensed contractor's test report and Electrical Inspector permission only above 200 kW; Tamil Nadu's rooftop FAQ says CEIG approval is compulsory above 10 kW. Where it applies, apply for it immediately after installation is complete, do not wait for the DISCOM to ask for it.

2. 2
   DISCOM Pre-Commissioning Inspection

   Owner: DISCOM Junior Engineer | Duration: see the DISCOM clocks below

   Once you submit the net metering application with all required documents (including the EIC in states that require it), the DISCOM's technical team schedules a Junior Engineer (JE) visit to inspect the installation. The JE checks earthing compliance, an inverter's compliance with anti-islanding protection standards or its certification, cable routing and labelling, panel mounting safety, disconnect switch placement, and meter board condition. Being present at this inspection with your commissioning engineer and all original documents is the single most impactful thing you can do to avoid a re-inspection, which delays the entire process.

3. 3
   Net Metering Application Submission

   Owner: EPC Installer or consumer | Submission itself is quick

   For PM Surya Ghar projects, the net metering application is submitted through the national portal (pmsuryaghar.gov.in), where the consumer uploads the installation details and geo-tagged photographs post-installation (the vendor may assist, MNRE guidelines clause 6(j)). For non-PM Surya Ghar projects, applications go directly to the DISCOM portal. A complete application package at this stage is non-negotiable, missing documents can send you back to the start of the clock. The document checklist below covers exactly what you need. Understanding common net metering rejection reasons before you submit is the best insurance against a restart.

4. 4
   DISCOM Net Meter Installation

   Owner: DISCOM metering department | Clock: 15 days from your installation certificate (rule 11(9))

   After the DISCOM JE clears your installation, the metering department must procure a bidirectional net meter (if not in stock) and schedule a metering crew to install it. In our field experience this is a delay-prone stage, though no official data ranks states on it. The central Rules require the agreement, meter and commissioning within 15 days of your installation certificate and set compensation of not less than ₹500 per day for DISCOM delay without just cause (rules 11(9) and 11(12)). Protect yourself by following up with the DISCOM metering department in writing after inspection clearance and documenting each follow-up with a timestamp.

5. 5
   System Energisation and Grid Synchronisation

   Owner: DISCOM + EPC | Usually soon after meter installation

   Once the bidirectional net meter is installed, the system is energised by closing the grid connection, following the same sequence laid out in this inverter commissioning checklist. Your inverter should auto-synchronise with the grid, verifiable by checking that the inverter is in "Grid Feed" or "On-Grid" mode rather than "Standby." At this stage, run a complete pre-energisation check: verify all DC and AC isolators are closed in the correct sequence, confirm the inverter display shows grid voltage and frequency within the inverter's grid-code window (check the datasheet), and check that generation is being measured on both the inverter app and the new bidirectional meter. This is the moment your customer's system becomes live, be present, document it, and photograph the meter reading at zero.

6. 6
   Generation Monitoring Setup

   Owner: EPC Installer | Typical duration: 1–2 hours on-site

   Set up inverter monitoring on the same day as energisation. Most modern string inverters (Solis, SolarEdge, Growatt, Fronius) have companion apps, install the app on the customer's phone, set up their account, verify that today's generation is already showing, and configure email or push alerts for fault conditions. Also add the system to your own monitoring account so your team can see generation data for all active systems. This enables proactive after-sales service, you identify an underperforming system before the customer notices, which is a powerful trust-builder. This monitoring capability directly supports your solar after-sales service programme.

7. 7
   Customer Handover and Commissioning Certificate

   Owner: EPC Installer | Typical duration: 1–2 hours on-site

   The final stage is a formal handover meeting with the customer. Deliver the physical commissioning certificate (issued by the DISCOM), the system as-built drawing, warranty cards for all equipment, a one-page operating guide, and any AMC contract documents. Walk the customer through the monitoring app, explain how to read the bidirectional meter, and cover basic troubleshooting (what to do if the inverter shows a fault code, who to call). Our solar handover checklist has the full pack and a 20-minute script. For PM Surya Ghar projects, explain when they should expect their subsidy credit. Collect the final payment milestone and ask for a Google review while the emotion is high. This handover is also the prime moment to pitch your AMC, the complete checklist is in the section below.

Documents Required at Each Stage

State-by-State Commissioning Timeline: Gujarat vs Maharashtra vs Karnataka

The commissioning timeline gap between states is not a minor inconvenience, it is a major operational variable that affects your working capital, customer satisfaction, and revenue recognition timing, as the state-by-state DISCOM approval benchmarks make clear. Here is a direct comparison of the three largest EPC markets.

Gujarat, Official Clocks

Gujarat is India's benchmark for commissioning speed, and how Gujarat EPCs handle commissioning on the ground reflects that maturity. All four state DISCOMs (DGVCL, MGVCL, PGVCL, UGVCL) work to GERC's Net Metering Rooftop Solar PV (Fourth Amendment) Regulations, 2024, which set a timetable in Regulation 7. We could not open the DISCOMs' own sites, so these are the regulator's clocks, not measured turnaround.

Maharashtra, Official Clocks

Maharashtra's file runs through MSEDCL's subdivision-level processing. MERC's Second Amendment (29 Aug 2024) sets a 15-day feasibility clock, deems applications up to 10 kW accepted, and requires a 15-day notice to rectify before rejection at a transformer. MSEDCL's SoP (April 2022, so it pre-dates those changes) lists self-certification with a licensed contractor's test report and Electrical Inspector permission only above 200 kW, and a sanction valid for six months. We found no official figure comparing urban and rural offices.

Karnataka, Official Clocks

Karnataka's BESCOM runs an online SRTPV portal (srtpv.bescom.org). Its Common SOP for distributed solar (file dated Oct 2025) treats applications up to 150 kW as deemed feasible and gives feasibility for larger ones within 10 working days, and the 80% distribution transformer limit still applies. For subsidy cases, keep your modules on the ALMM list.

Common Delays and How to Prevent Them

Key Rules: Solar Commissioning in India 2026

Customer Handover Checklist

Tracking 20+ Projects in Parallel, Without Losing Any

For a scaling EPC managing 20 or more active commissioning pipelines simultaneously, tracking via WhatsApp groups or Excel sheets is where projects fall through the cracks. A project stuck at Stage 3 will not announce itself, it will just quietly age until the customer calls.

The solution is treating post-installation commissioning as a true sales pipeline stage, not a generic "closed" or "completed" bucket. Your solar sales funnel should extend all the way through to energisation.

• EIC Application Submitted, with date and reference number
• EIC Certificate Received, with date
• Net Metering Application Submitted, with DISCOM reference number
• Technical Sanction Received, with date and sanctioned capacity
• JE Inspection Scheduled, with inspection date and assigned JE name
• JE Inspection Cleared, with date and clearance letter reference
• Net Meter Installation Scheduled, with DISCOM metering crew date
• System Energised, with commissioning date and meter reading
• Commissioning Certificate Uploaded (PM Surya Ghar), with upload date
• Customer Handover Complete, with handover date and payment received

Quickest Solar CRM lets you set customisable lead stages like these, log activities on each lead, and set follow-up reminders. At a glance, you can see which of your active projects is at which stage, and set a reminder for the DISCOM clock date so a follow-up call to the metering department happens that week.

How Being an Empanelled Vendor Accelerates Commissioning

If you are a PM Surya Ghar empanelled vendor, your commissioning process has two additional advantages. First, vendor registration on the national portal means your credentials are already on the portal when the consumer applies. Second, PM Surya Ghar applications can be escalated through the national portal's grievance mechanism, which the MNRE guidelines say is resolved within 30 days.

For EPCs who are not yet empanelled, the commissioning process is identical except that PM Surya Ghar subsidy upload is not available, meaning your customers must pursue the subsidy through a different channel (or the project does not qualify). Because many residential buyers ask about the PM Surya Ghar subsidy, vendor registration is close to table stakes for residential-focused EPCs.

After Commissioning: Service, AMC, and Referrals

Commissioning is not the end of the customer relationship, it is the moment the relationship enters its most valuable phase. A freshly commissioned customer, thrilled by their first electricity bill reduction, is your most powerful referral asset.

Use the handover visit to introduce your AMC offering. The structure of a well-priced AMC, what to include, and how to turn service visits into referral triggers is covered in depth in the solar after-sales service guide. The key point here: do not leave the handover visit without either a signed AMC or a scheduled follow-up specifically to discuss AMC. Asking on the day, while the system's first generation is fresh, is easier than chasing later. The solar sales follow-up rules apply to post-commissioning upsell exactly as they do to new lead conversion.

The commissioning moment also connects directly to your solar sales funnel for India, it is the trigger for referral requests, Google review solicitation, and the beginning of your 12-month customer lifecycle communication plan.

Frequently Asked Questions