India's rooftop solar market has expanded rapidly since the PM Surya Ghar Muft Bijli Yojana made residential systems significantly more affordable. That growth brought a wave of new installers into nearly every city — some excellent, some not. The good news: the framework for evaluating a rooftop solar company is essentially the same whether you're in Chennai, Bengaluru, Pune, or Jaipur. What changes is the local context around it.
What's the Same Everywhere in India
Central Subsidy Amounts
PM Surya Ghar subsidy slabs — ₹30,000 for 1kW, ₹60,000 for 2kW, and ₹78,000 for 3kW and above — apply nationwide for eligible residential consumers.
Equipment Standards
BIS and IEC compliance requirements for panels and inverters are national standards, not state-specific ones.
MNRE Empanelment
The vendor empanelment framework operates at the national level through the PM Surya Ghar portal, regardless of which state you're in.
What Changes From State to State
Your DISCOM
TANGEDCO in Tamil Nadu, BESCOM in Karnataka, MSEDCL in Maharashtra, and so on — each has its own net-metering application process, portal, and processing timelines.
State Top-Up Subsidies
Some states add their own subsidy layered on the central scheme. Tamil Nadu, for example, announced a state-level top-up in its August 2026 budget.
Climate & Roof Design
Coastal cities need corrosion-resistant mounting for salt-air exposure; high-dust regions need more frequent cleaning schedules; heavy-monsoon areas need particular attention to sealing.
Why this matters when choosing: an installer's familiarity with your state's DISCOM process is a genuine differentiator, not a minor detail. Most delays in rooftop solar projects happen at the feasibility approval and net-metering inspection stages — exactly where local process knowledge saves weeks.
The 7 Checks That Apply Anywhere
Verify PM Surya Ghar empanelment and DISCOM registration
This is the highest-value filter question. Empanelment requires real registration and process experience, which most unreliable vendors simply don't have. Ask directly, and ask whether they handle the full subsidy and net-metering paperwork themselves or leave it to you.
Get specific equipment brands named in writing
A confident installer names exact panel and inverter brands, models, and wattages immediately. Vague phrases like "high-quality imported panels" without a brand name suggest the installer may substitute whatever is cheapest at procurement time.
Confirm all four warranties separately
Panel product warranty, panel performance warranty, inverter warranty, and the installer's own workmanship warranty are four different things from different parties. A quote saying only "25-year warranty" is incomplete — see our full breakdown of what each actually covers.
Ask for an itemized quote, not a lump sum
Panels, inverter, mounting structure, wiring and safety components, labor, and net-metering charges should each be listed separately. Without this, fair comparison between quotes is impossible and hidden costs can surface later.
Verify local track record in your specific city
Ask for a real number of completed installations and references from projects near you. Many companies list broad service areas but have genuine operational presence in only a few cities — which matters most when you need a service visit after installation.
Clarify after-sales service terms and response time
Panels need little maintenance, but inverters, wiring, and mounting hardware benefit from periodic checks. Ask what's included, for how many years, what a service call costs afterward, and how quickly a technician can reach your location.
Confirm they handle your state's DISCOM net-metering process
Net metering is a separate approval from the subsidy application, with its own inspection and meter installation. Confirm explicitly whether liaison with your DISCOM is included in the quoted scope or billed as an add-on later.
Red Flags That Apply in Any City
- Pressure to sign immediately with a "today-only" price — legitimate quotes don't expire in 24 hours
- No verifiable physical office — a phone number and website alone is thin for a 25-year commitment
- Warranty terms only given verbally, never in writing
- Quotes far below the local market range with no explanation of what's different — usually lower-tier equipment or missing scope
- Subsidy or net-metering paperwork mentioned only after a deposit is paid
- Reviews that all read identically or were posted in one short burst
National Brand vs Local Installer: How to Decide
| Consideration | National Brand | Local Installer |
|---|---|---|
| Scale and resources | Generally greater | Varies widely |
| Local DISCOM familiarity | Depends on their presence in your state | Often strong in their home city |
| Service response time | Depends on local service infrastructure | Often faster if genuinely local |
| Price competitiveness | Varies; scale can help or add overhead | Often competitive for mid-sized projects |
| Reference verification | Ask for projects in your city specifically | Usually easier to verify locally |
Neither category is automatically better. The deciding factors should be verified track record in your city, transparent itemized quoting, and clear warranty and service commitments.
A Simple Way to Compare Final Quotes
Once you have two or three itemized quotes, lay them side by side against the same checklist: equipment brand and specification, all four warranty terms, whether subsidy and net-metering handling are included, total itemized cost, and verified local track record. The lowest number rarely tells the full story — the installer who's most transparent across every one of these points is usually the safer long-term choice.
Frequently Asked Questions
What is the single most important thing to verify about a rooftop solar company in India?
Whether they are empanelled under the PM Surya Ghar scheme and registered with your state's DISCOM. Empanelment requires real registration and process experience, so it filters out a large share of unreliable vendors, and it directly affects whether your subsidy application and net-metering approval go smoothly.
Does the PM Surya Ghar subsidy work the same way in every state?
The central subsidy amounts are the same nationwide, but each state has its own DISCOM handling net metering, its own application portal and processing timelines, and in some cases an additional state-level top-up subsidy. This is why an installer's familiarity with your specific state's DISCOM process genuinely matters.
Should I choose a national brand or a local rooftop solar installer?
Both can work well. National brands often bring manufacturing integration and scale, while local installers typically offer faster service response and closer familiarity with your local DISCOM's processes. The deciding factor should be verified track record in your specific city and clear warranty and service commitments, not company size.
How many quotes should I get before choosing a rooftop solar company?
Two to three itemized quotes is a reasonable standard. This gives you a realistic price range for your specific roof and system size, and makes it easier to spot when a quote is missing scope that others include, such as net-metering liaison or workmanship warranty coverage.
Based in Chennai and want an installer who handles the full TANGEDCO and subsidy process? Get a free site survey from Arka Solar Energy — no obligation.