Solar Installation Timeline in India: How Long Does It Really Take?

A complete solar installation takes 3–8 weeks from first enquiry to power generation. The physical rooftop work is done in 1–3 days. The longest phase is DISCOM approval for net metering, which takes 2–6 weeks depending on your state. Here is the full phase-by-phase breakdown.

The installer visits your home to assess the roof and design the system. This typically happens within 1–2 days of your enquiry. The survey itself takes 30–60 minutes.

What the installer evaluates:

• Usable roof area (after excluding tanks, lift rooms, setbacks)
• Shadow patterns from nearby structures and trees
• Roof type, age, and structural condition
• Electrical infrastructure: meter location, switchboard, earthing
• Your electricity consumption pattern from recent bills

After the survey, expect a detailed quotation within 1–3 days. A good practice is to get 2–3 quotes for comparison. How to compare installer quotes →

Once you approve a quote and pay the advance (typically 30–50%), the installer procures components. Standard timeline:

• Solar panels — 2–5 days from distributor. Popular brands like Tata, Waaree, and Adani are usually available ex-stock.
• Inverter — 2–4 days. Growatt, Havells, and ABB models are widely stocked.
• Mounting structure — 3–7 days. Often fabricated to order for your specific roof type and panel count.
• Electrical components — 1–2 days. Standard items available at electrical distributors.

Delays can occur with premium or less common brands — confirm lead times before placing your order. Tier 1 panel brands generally have better supply chain reliability.

This is the most visible phase — when panels actually go up on your roof. For a typical 3kW residential system:

Day 1: Mounting structure erected. Base plates drilled and fixed, tilt rails assembled, levelling completed. Cable conduit path prepared from roof to inverter location.

Day 2: Panels mounted on rails. DC wiring completed (panel strings to junction box to inverter). Inverter mounted and connected. AC wiring from inverter to distribution board.

Day 3 (if needed): Earthing installed. Surge protection devices fitted. Cable management tidied. System tested in standalone mode. Site cleanup.

Larger systems (5kW–10kW) may take an extra day. The installation crew is typically 3–5 people. You should be present on Day 1 (for access coordination) and the final day (for verification).

Learn the detailed installation process step by step →

Once the bi-directional meter is installed by DISCOM, commissioning happens immediately or within 1–2 days:

1. System energisation — Installer switches on the system and verifies grid synchronisation. The inverter display should show active power generation.
2. Output verification — Check real-time output against expected values. A 3kW system should show 2–2.5kW around noon on a clear day.
3. Monitoring setup — Configure the inverter's WiFi monitoring app on your phone. This lets you track daily generation, consumption, and grid export.
4. Documentation — Receive warranty cards, commissioning certificate, DISCOM approval letter, and maintenance guide.
5. Subsidy application — Your installer helps you apply for PM Surya Ghar subsidy through the national portal. Subsidy is credited within 30–60 days.

From this day forward, your panels generate power and your meter tracks the savings.

Several factors are within your control:

• Have documents ready — Electricity bill, ID proof, roof ownership proof, society NOC (if apartment). Missing documents delay DISCOM application. See our pre-installation checklist →
• Choose an experienced local installer — Installers with strong DISCOM relationships and a track record in your area navigate approvals faster.
• Decide quickly on quotes — The comparison phase is in your hands. Two weeks of indecision adds two weeks to your timeline.
• Fix roof issues in advance — Waterproofing, structural repairs, or removing obstacles should happen before the installation date, not during it.
• Be available for the DISCOM inspection — Missed inspection dates can push your timeline by another 1–2 weeks.

The sooner you start, the sooner you save. Every month of delay is a month of electricity bills you could have offset with solar.

Solar Vipani connects you with 2–3 verified local installers who manage the entire timeline — from survey to commissioning — so you can focus on your savings.

Get your free solar quotes →