Installation8 min read
The Solar Panel Installation Process, Step by Step
Seven stages from enquiry to a working net meter, what each one is for, and where the delays genuinely come from.
Published · Updated
Key takeaways
- Physical installation of a residential system takes two to four days; the full timeline from order to a working net meter is usually six to ten weeks.
- Almost all of that timeline is DISCOM process — feasibility approval, net-meter sanction and inspection scheduling — not construction.
- The site survey is the stage that determines whether the system performs; a design produced without one is a guess.
- Installation must follow feasibility approval, not precede it, or the subsidy claim fails.
- Commissioning should produce measured test results and a documented handover pack, not just a functional check.
Most people buying rooftop solar have never bought anything like it before, and the process is opaque from outside. The array goes up in a couple of days, which makes the six to ten week overall timeline confusing until you understand what is happening in the gaps.
Here is the whole sequence, what each stage is for, and where the time actually goes.
Stage 1 — Site survey and consumption analysis
The survey is where the system is really designed. An engineer measures the usable roof, assesses the structure, runs a shadow analysis across the seasonal sun path — the winter path, not the summer one, because that is what governs — and checks the existing electrical infrastructure and sanctioned load.
In parallel we look at twelve months of your electricity bills. Consumption, not roof area, should decide the capacity. A proposal produced from a satellite image and a phone call has skipped the only stage that determines whether the system meets its numbers.
Stage 2 — Design and proposal
Design converts the survey into a specification: capacity, module and inverter selection, string configuration, mounting design for the actual roof and local wind loading, cable sizing, protection scheme, earthing and lightning protection, and array layout with genuine cleaning access.
The proposal should state the modelled generation with its assumptions, the scope boundary, and the price. If it states a per-watt rate and a module brand, there is no design behind it yet.
Stage 3 — DISCOM feasibility application
The application goes to your distribution company against your existing connection. They verify that your sanctioned load supports the proposed capacity and issue a feasibility approval.
This is the first place time disappears, and it is also the stage people are tempted to skip. Installing before approval breaks the PM Surya Ghar sequence and can cost you the subsidy entirely.
Stage 4 — Installation
Mounting structure first, then modules, then DC cabling and combiner boxes, then the inverter, AC cabling, protection and earthing. For a residential system this is two to four days of work; a commercial installation runs four to seven days or longer depending on scale.
The only genuine disruption to the building is the electrical tie-in, which needs a short planned outage — usually a few hours, scheduled once.
Stages 5 to 7 — Net meter, inspection, commissioning
The net-meter application goes to the DISCOM, the installation is inspected, and the meter is installed and configured for bidirectional measurement. Only then does the plant legally start exporting and offsetting.
Commissioning should be a measurement exercise, not a switch-on. String open-circuit voltages and operating currents, insulation resistance, earth continuity, inverter configuration records, and a performance baseline you can hold the system to in year five. That documentation, plus as-built drawings and an O&M pack, is what separates an asset from an installation.
- String voltage and current measurements recorded at commissioning
- Insulation resistance and earth continuity test results
- Inverter configuration and monitoring set up and demonstrated
- As-built drawings, O&M manual and warranty documentation issued as a set
- A measured performance baseline for future comparison
Frequently asked questions
How long does solar panel installation take?
The physical installation of a residential rooftop system takes two to four days. The complete timeline from order to a working net meter is generally six to ten weeks, and the great majority of that is distribution company process time — feasibility approval, net-meter sanction and inspection scheduling — rather than work on your roof.
Do I need to be at home during the installation?
Not for the roof work, though someone should provide access. You will need to be available for the electrical tie-in, which involves a short planned power interruption, and for the DISCOM inspection, which requires the site to be accessible. We schedule both with you in advance.
What should be handed over at the end of a solar installation?
As-built drawings, the single line diagram, string test results, insulation resistance and earth continuity records, inverter configuration details, monitoring access, the O&M manual, warranty documentation and a measured performance baseline. If you are handed only a warranty card, you have no way to prove underperformance later.
Can I do a DIY solar installation myself?
Technically a small off-grid kit can be self-installed, but for a grid-connected rooftop system DIY closes the doors that matter: the PM Surya Ghar subsidy and net metering both require installation by a DISCOM-registered vendor, so a self-installed system forfeits the ₹78,000 assistance and cannot legally export to the grid. Add the genuinely dangerous parts — DC arrays at several hundred volts, roof anchoring, earthing and protection coordination — and DIY saves the smallest cost on the project while giving up the largest benefits.
Why clients choose Dvaitam Solar
Engineering-first approach
Structural survey, seasonal shadow analysis and yield modelling before a capacity is quoted — never a catalogue picked off a price list.
Premium Tier-1 equipment
ALMM-listed modules and BIS-certified balance of system, specified against the engineering and not substituted after contract.
PM Surya Ghar assistance
Portal registration, DISCOM feasibility, net metering and inspection filed and chased until the subsidy is credited.
End-to-end EPC execution
Design, supply, civil, electrical, testing and commissioning under one scope and one accountable team.
Professional installation
Method statements, quality records captured as work proceeds, and measured commissioning tests rather than a switch-on.
Long-term support
Monitoring configured at handover, a documented O&M pack and a performance baseline you can hold the plant to in year five.
Next steps
Related reading
- InstallationNet Metering in Rajasthan: How It Works and How to ApplyThree distribution companies, one process in outline — and the sanctioned-load rule that decides what capacity you are allowed.
- InstallationSolar Maintenance Checklist for Rajasthan ConditionsCleaning intervals that reflect real Rajasthan dust, plus the annual electrical checks that catch failures before they cost generation.
- SubsidyPM Surya Ghar: Who Qualifies and How Much You Actually GetEligibility rules, the exact slab arithmetic, housing-society rates and the document checklist — everything to settle before you touch the portal.
Browse every guide in the Dvaitam solar knowledge base.
Have a question this guide did not answer?
Send us your electricity bill and the details of your site. An engineer will come back with the specifics for your property — capacity, generation, subsidy position and realistic payback — at no cost.