Solar Commissioning Process in India

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, field-tested playbook for the solar commissioning process in India. It covers every stage in the correct sequence, the documents required at each step, state-specific timelines for Gujarat, Maharashtra, and Karnataka, 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.

Data draws on MNRE's grid-connectivity framework{target="_blank" rel="noopener"}, the PM Surya Ghar national portal documentation{target="_blank" rel="noopener"}, CEEW's solar deployment research{target="_blank" rel="noopener"}, the Ministry of Power's net metering framework{target="_blank" rel="noopener"}, and field reports from EPCs across our QuickEstimate network.

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, can be 30 to 90 days after "installation complete" depending on how well the commissioning process is managed.

For a scaling EPC like Rohit running a 12-person team, 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 a ₹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.

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 subsidy is released only after the commissioning certificate is uploaded to the national portal. A disorganised commissioning process that extends to 75 days instead of 35 delays your customer's ₹78,000 subsidy by 40 days, 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 | Typical duration: 5–15 days

   In most states, an Electrical Inspector certificate is required before the DISCOM will proceed with net metering inspection. The Electrical Inspectorate (part of the state's Labour & Employment or Energy department) sends a government-certified electrical inspector to verify the installation meets safety and wiring standards under the Indian Electricity Act 2003 and the Central Electricity Authority (Installation and Operation of Meters) Regulations. In Gujarat, this is integrated into the DISCOM's own inspection and is not a separate step. In Maharashtra and Karnataka, this is a mandatory prerequisite. Apply for the EIC 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 | Typical duration: 7–20 days after application

   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, anti-islanding relay or inverter 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 by 15–20 additional days.

3. 3
   Net Metering Application Submission

   Owner: EPC Installer | Typical duration: 1–2 days (submission itself)

   For PM Surya Ghar projects, the net metering application is submitted through the national portal (pmsuryaghar.gov.in), where the empanelled vendor uploads commissioning documents post-installation. 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 reset the clock by 7–15 days in most DISCOMs. The document checklist below covers exactly what you need. Understanding common [net metering rejection reasons](/blog/net-metering-rejection-reasons) before you submit is the best insurance against a restart.

4. 4
   DISCOM Net Meter Installation

   Owner: DISCOM metering department | Typical duration: 7–30 days after inspection clearance

   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. This is consistently the most delay-prone stage across all states. Gujarat DISCOMs maintain better meter inventory; Tamil Nadu and some MSEDCL subdivisions face 20–30 day meter backlogs in peak solar months (October–February). There is limited you can do to speed this stage up, but you can protect yourself by following up with the DISCOM metering department by phone every 5 days after inspection clearance and documenting each follow-up with a timestamp.

5. 5
   System Energisation and Grid Synchronisation

   Owner: DISCOM + EPC | Typical duration: 1–3 days after meter installation

   Once the bidirectional net meter is installed, the system is energised by closing the grid connection. 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 frequency within tolerance (49.5–50.5 Hz), 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](/blog/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). 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. Here is a direct comparison of the three largest EPC markets.

Gujarat, 28–40 Days Total Commissioning Time

Gujarat is India's benchmark for commissioning speed. All four state DISCOMs (DGVCL, MGVCL, PGVCL, UGVCL) are fully integrated with the PM Surya Ghar national portal, the EIC process is absorbed into the DISCOM's own inspection, and meter inventory is the best-managed in the country.

Maharashtra, 45–65 Days Total Commissioning Time

Maharashtra adds two significant complications: the mandatory separate EIC from the Maharashtra Electrical Inspectorate, and MSEDCL's distributed processing model where each subdivision office handles its geographic zone independently. Quality and speed vary considerably between urban (Pune, Nashik) and rural (Vidarbha, Marathwada) offices.

Karnataka, 45–65 Days Total Commissioning Time

Karnataka's BESCOM is India's most digitally advanced major DISCOM for solar, the SUVARNA SOLAR portal provides centralised application tracking and the BESCOM helpline is more responsive than most peers. However, the mandatory Karnataka-specific EIC format (different from Maharashtra) and BESCOM's strict ALMM cross-checking create two unique delay triggers.

Common Delays and How to Prevent Them

Key Statistics: 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 for 25 days 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

QuickEstimate's CRM pipeline supports exactly these custom stages. At a glance, you can see which of your 30 active projects is stuck at which stage, which ones have exceeded the expected duration for that stage, and which ones need a follow-up call to the DISCOM metering department this week. This level of visibility is what separates a 10-project operation from a 30-project one, with the same team size.

How Being an Empanelled Vendor Accelerates Commissioning

If you are a PM Surya Ghar empanelled vendor, your commissioning process has two additional advantages. First, the national portal's pre-verification of your credentials removes one round of DISCOM document validation. Second, DISCOM portals for PM Surya Ghar applications receive more monitoring from MNRE than non-scheme applications, meaning chronic delays are more likely to generate regulatory attention and faster resolution.

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). Given that over 60% of residential solar inquiries in 2026 reference PM Surya Ghar subsidy as a key purchase driver, empanelment is now 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. An unsigned customer at handover has a 40% lower AMC conversion rate than one who signs on the day. 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

What is the solar commissioning process in India?

The solar commissioning process in India consists of seven sequential stages: applying for an Electrical Inspector Certificate (where required by the state), completing the DISCOM pre-commissioning inspection, submitting the net metering application, waiting for the DISCOM to install the bidirectional net meter, energising the system and synchronising with the grid, setting up generation monitoring, and conducting a formal customer handover. Total timeline varies from 28 days in Gujarat to 65+ days in states like Tamil Nadu.

Do I need an Electrical Inspector Certificate for solar commissioning?

It depends on the state. Maharashtra (MSEDCL) and Karnataka (BESCOM) require a separate Electrical Inspector Certificate before proceeding to DISCOM metering. Gujarat's DISCOMs have integrated the electrical inspection check into their own site visit and do not require a separate EIC. Always check the state-specific checklist before starting the commissioning process.

How long does the solar commissioning process take in India?

The total solar commissioning process takes 28–40 days in Gujarat (India's fastest), 45–65 days in Maharashtra and Karnataka, and 60–90 days in Tamil Nadu. The biggest variable is the net meter installation stage, which depends on the DISCOM's meter inventory and metering crew availability. EPCs who submit complete application packages and attend the JE inspection consistently complete the process 15–20 days faster.

What documents are needed for solar commissioning in India?

The key documents are: as-built single-line diagram, earthing test report, MNRE ALMM certificates for panels and inverter, Electrical Inspector Certificate (Maharashtra and Karnataka), consumer electricity bill copy, site photographs (minimum 8), net metering application form, and system capacity letter. For PM Surya Ghar projects, add the empanelled vendor certificate and national portal application reference.

What happens if the DISCOM delays the net meter installation?

If the DISCOM's net meter installation exceeds the mandated timeline (30 days under Ministry of Power rules for systems up to 10 kW), file a complaint with the state's Consumer Grievance Redressal Forum (CGRF). If unresolved, escalate to the State Electricity Regulatory Commission (SERC). For PM Surya Ghar applications, escalate through the national portal's grievance mechanism, which carries MNRE-level weight.

How do I track commissioning status for multiple projects at once?

Use a CRM with custom pipeline stages that map to each commissioning step, EIC submitted, DISCOM sanction received, JE inspection cleared, net meter scheduled, system energised. Each stage should have a date field and an expected duration. Any project past its expected stage duration is flagged for follow-up. QuickEstimate supports exactly this configuration, making it easy to see at a glance which of your 20+ projects needs attention today.

What is the customer handover checklist for solar commissioning?

At handover, deliver: DISCOM commissioning certificate (original), as-built single-line diagram, all equipment warranty cards, a one-page operating guide, and AMC contract documents. On-site, verify the bidirectional meter is reading correctly, install the monitoring app on the customer's phone, explain fault response procedures, collect the final payment milestone, ask for a Google review in person, and pitch the AMC.

How does PM Surya Ghar affect the commissioning process?

For PM Surya Ghar projects, the commissioning certificate must be uploaded by the empanelled vendor to the national portal (pmsuryaghar.gov.in) immediately after energisation. This triggers the subsidy disbursement process, the customer receives their ₹78,000 subsidy credit within approximately 30 days of upload. Any delay in commissioning is a direct delay in subsidy receipt, which affects customer satisfaction and the EPC's credibility with the customer.