How to rate a solar company on approvals handling, service, and engineering depth
Most homeowners compare solar companies on price per kilowatt and panel brand. Those two factors matter, but they rarely explain why one project finishes in three weeks while another drags on for three months. The difference almost always sits in three areas buyers overlook: how a company handles approvals, how deep its service support runs, and whether its engineering choices hold up across decades. We built the framework below so you can score any solar company on these criteria before you sign.
TL;DR - Summary
- What approvals are needed for rooftop solar in India? - You need DISCOM net metering approval, a PM Surya Ghar subsidy application (if eligible), and local electrical safety clearance. Delays in any of these can stall your project for weeks. A company that manages the full approvals chain in house removes the single biggest source of residential solar friction.
- Why does approvals handling matter in company selection? - Paperwork errors or missed follow ups with the DISCOM are the top reasons Indian rooftop solar projects overshoot their timelines. Rating a company on whether it owns the approvals process, rather than outsourcing it, tells you more about project reliability than any panel spec sheet.
- How to judge engineering depth? - Look beyond panel wattage. Ask about mounting structure material and wind rating, inverter weatherproofing, panel level inspection (such as electroluminescence testing), and whether the company sizes your system based on a site survey or a generic formula. These details determine generation in year 15, not just year 1.
- What does strong service support look like? - It means a single point of accountability for every warranty, scheduled panel health checks, professional cleaning, and real time inverter monitoring. If a company tells you to call the panel manufacturer for a warranty claim, that is a red flag.
- How to use a decision matrix? - Score each company on approvals ownership, engineering rigor, and service depth using the weighted criteria table in this article. The company with the highest composite score is your safest long term bet, not necessarily the cheapest quote.
Why price alone misleads
A lower quote often hides costs that surface later. Galvanized iron structures rust within a few years in coastal or humid cities. Inverters that need sheltered mounting add civil work expenses. Subsidy claims rejected due to paperwork gaps mean you absorb the full system cost.
When you rate a company only on price, you are comparing the visible portion of two icebergs. The mass below the waterline is approvals friction, engineering shortcuts, and absent service. Our recommendation: treat price as one column in a broader decision matrix, not the deciding row.
Rating approvals handling
Residential rooftop solar in India requires three layers of approval. First, you apply for net metering through your local DISCOM. Second, if you want the PM Surya Ghar subsidy (up to ₹78,000 for systems 3 kW and above), you file through the national portal. Third, some states require an electrical safety inspection before or after commissioning.
Each layer involves specific documents: a recent electricity bill, proof of roof ownership, system design drawings, and sometimes a structural stability certificate. Missing even one document can bounce your application back by weeks.
Questions to ask
Does the company file DISCOM and subsidy applications on your behalf, or hand you a checklist and wish you luck? Does it track application status and follow up with the utility? Has it completed net metering approvals in your specific city and DISCOM zone before?
We handle the entire approvals chain in house. From DISCOM paperwork to PM Surya Ghar portal submission, our team manages every step so you never chase a government office yourself. That is a core reason our installation timeline from booking to grid connection stays tight: site visit within 2 days, installation roughly 1 week after booking, and the install itself finished in 24 to 48 hours.
Rating engineering depth
Engineering depth is not about using the most expensive components. It is about choosing components that perform reliably across 25 to 30 years of Indian weather, and sizing the system based on your actual roof, not a generic template.
Structure and mounting
Ask what material the mounting structure uses. Standard galvanized iron corrodes over time, especially in humid or coastal regions. We use a Magnelis alloy structure tested to 180 km/h winds, backed by a 25 year anti corrosion warranty. Every structural bolt is epoxy sealed. Most competitors offer 10 to 12 years on structure, if they offer a structure warranty at all.
Inverter selection
A good company recommends the inverter type your roof actually needs. If shading analysis shows no real shading risk, a string inverter is the honest recommendation, even though micro inverters carry a higher price tag. We follow the roof, not the margin. Our inverter is waterproof (IP65 rated), so it can mount unsheltered, unlike typical assembled system inverters that need a covered spot.
Panel inspection
Panels can have micro cracks invisible to the naked eye. We run electroluminescence (EL) imaging and human inspection on every panel before it reaches your roof. We also verify wattpeak output against the manufacturer spec to catch batch to batch variation. Serial tracking on every panel means traceability across the full warranty period.
Site specific sizing
A company with real engineering depth sends a qualified engineer for a technical site visit before quoting. That visit assesses roof orientation, tilt angle, shadow patterns across seasons, electrical panel capacity, and structural load bearing. We complete this visit within 2 days of booking. If a company quotes you a system size over the phone without seeing your roof, that is a warning sign.
Rating service support
Service support separates a product company from a vendor that disappears after installation. Here is what to evaluate.
Warranty accountability
Many solar installers assemble components from different manufacturers. If a panel fails, they point you to the panel maker. If the inverter faults, they redirect you to the inverter brand. We own every warranty ourselves because every component (panel, inverter, structure) is branded and controlled by us. One call resolves any issue, regardless of which component is involved.
Ongoing maintenance
Dust, pollution, and bird droppings reduce panel output significantly in Indian cities. Ask whether the company includes scheduled panel health checks and professional cleaning. We monitor inverter performance every 5 minutes through remote telemetry. If generation dips, we catch it before you notice a higher electricity bill.
Generation guarantee
The strongest signal of service confidence is a generation guarantee. Our Arkashield guarantee promises minimum generation output. If the system underperforms, we pay back at ₹7 per unit of shortfall. Few companies in the Indian residential solar market offer anything comparable.
Decision matrix for scoring
Use this table to score any solar company you are evaluating. Rate each criterion from 1 (poor) to 5 (excellent). The suggested weights reflect how much each factor affects long term project success.
| Criterion | What to check | Suggested weight | Company A score | Company B score |
|---|---|---|---|---|
| DISCOM approvals ownership | Files and tracks net metering application in house | 20% | ||
| Subsidy filing support | Handles PM Surya Ghar portal submission end to end | 10% | ||
| Mounting structure quality | Material type, wind rating, anti corrosion warranty years | 15% | ||
| Inverter fit and weatherproofing | Shading based recommendation, IP rating, sheltered vs unsheltered | 10% | ||
| Panel inspection process | EL testing, wattpeak verification, serial tracking | 10% | ||
| Site specific engineering | In person site visit before quoting, shadow and load analysis | 10% | ||
| Single warranty accountability | One entity owns all component warranties | 10% | ||
| Maintenance and monitoring | Scheduled cleaning, health checks, remote inverter monitoring | 10% | ||
| Generation guarantee | Written minimum output commitment with financial penalty | 5% |
Multiply each score by its weight, then sum. The company with the highest weighted total is your strongest candidate. Leave the score columns blank, print the table, and fill it in during or after each vendor conversation.
Red flags to watch for
Certain patterns signal that a company will create friction after installation. Watch for these during your evaluation.
The company quotes a system size without visiting your roof. It cannot name the DISCOM zone it has completed net metering in. It offers no structure warranty or caps it at 5 years. It tells you to contact the panel manufacturer directly for warranty claims. It has no generation guarantee or refuses to put one in writing.
Any single red flag does not disqualify a company automatically. But two or more together suggest you are dealing with a vendor that will move on after installation, leaving you to manage the system alone.
How we score on this framework
We are a product company, not an assembler. Every component is branded, tested, and warranted by us. Our in house team handles DISCOM paperwork, PM Surya Ghar submissions, and electrical safety clearances. Our Arka Assured quality process covers EL panel inspection, wattpeak verification, 180 km/h wind tested structures, and roof assessment before installation begins.
Our MNRE rating is 4.9 and above. We are rated 4 and above on Google in every city we operate in: Bangalore, Hyderabad, Pune, and Nagpur. We offer 12 month no cost EMI, the only player in the category offering a full 12 months interest free. And our Arkashield guarantee backs generation output with a financial commitment.
When you fill in the decision matrix above, we are confident our scores will speak for themselves. But do not take our word for it. Use the framework on every company you speak with, including us.
The right solar company is not the one with the lowest quote. It is the one that owns the full chain: approvals, engineering, and service. Score every vendor on these three pillars, and you will make a decision that holds up for decades, not just the first monsoon season.
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Evaluating a solar company on approvals, engineering, and service, not just price.
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