What solar models does Sun Wave offer?

We offer three flexible models: EPC (Engineering, Procurement & Construction) where you own the system outright for maximum long-term savings; RESCO/OPEX where our partners install at zero cost and you buy cheaper electricity; and Open Access where we help you procure off-site solar power through leading providers. We recommend the best model based on your business needs.

What is EPC and why should I choose it?

EPC stands for Engineering, Procurement & Construction. Under this model, Sun Wave handles the complete solar project — from system design and equipment procurement to professional installation and commissioning. You own the system from Day 1, benefit from accelerated depreciation, government subsidies, and achieve a typical payback period of 3-5 years with 25+ years of free electricity thereafter.

How does the RESCO/OPEX model work?

Under RESCO (Renewable Energy Service Company), our trusted partners install, own, and maintain a solar system on your rooftop at zero cost to you. You simply purchase the electricity generated at a rate 20-30% lower than your grid tariff. After the contract period (typically 10-15 years), the system is transferred to you for free. It's a pure OpEx model with immediate savings.

What is Open Access solar and who is it for?

Open Access allows large industrial consumers to procure solar power from off-site solar plants through the grid. It's ideal for businesses with high energy consumption but limited rooftop space. We work with leading open access providers to negotiate the best rates and handle all regulatory compliance. Typically suited for loads above 100 KW.

Which industries do you serve?

We primarily serve industrial and commercial clients — steel manufacturers, auto component factories, alloy plants, plastic manufacturers, textile units, warehouses, and corporate offices. Our expertise is in designing systems for energy-intensive operations where solar delivers the highest impact and ROI.

What equipment brands do you use?

We exclusively use Tier-1 equipment from trusted brands including Sungrow and Solis for inverters, and Gautam Solar, Waree, and Sattvik for solar panels. All equipment comes with manufacturer warranties — 25 years for panels and 5-10 years for inverters — ensuring decades of reliable performance.

What regions do you currently serve?

We are headquartered in Faridabad and currently operate across Delhi-NCR including Faridabad, Gurugram, Noida, and Delhi. We are actively expanding into Rajasthan, Uttar Pradesh, West Bengal, and other states. Contact us to check availability in your area.

How long does a typical installation take?

A typical industrial/commercial installation takes 4-8 weeks from site survey to commissioning, depending on system size and site conditions. We handle all approvals, DISCOM paperwork, and net metering applications — you don't have to worry about anything.

Do you handle all approvals and documentation?

Yes, absolutely. We manage the entire documentation process end-to-end — structural assessment, DISCOM approvals, net metering application, government subsidy applications, and all regulatory compliance. Our team has deep experience navigating the approval process across multiple states.

What happens after installation? Do you provide support?

Yes. Every installation comes with 24/7 remote monitoring, preventive maintenance schedules, and rapid fault resolution. We provide detailed performance reports and ensure your system operates at peak efficiency throughout its lifetime. We're your long-term energy partner.

Solar EPC Company in India: The Complete Guide 2026

TL;DR — Solar EPC Company in India

A solar EPC company in India delivers turnkey Engineering, Procurement, and Construction for industrial and commercial PV plants — from feasibility through commissioning and net metering.
Typical industrial solar EPC cost in India ranges from ₹3.5–4.5 Cr per MW (DC) as of 2026, depending on roof type, inverter brand, and balance of system quality. Read the full breakdown in our solar EPC cost per MW guide.
The best solar EPC companies in India combine ALMM-listed Tier-1 module supply, Sungrow or Huawei inverters, IS-2062-grade structures, in-house DISCOM liaison, and 5-year minimum O&M contracts.
Project timeline for a 1 MW factory rooftop plant is 90–120 days from PO to commissioning, with net metering approval taking 30–60 days depending on state DISCOM.
The right top solar EPC contractor in India for your factory will offer flexible commercial models — CAPEX, RESCO/OPEX, and Open Access — not just one.
Sun Wave Technologies is a Faridabad-headquartered solar EPC company in India serving industrial clients across Delhi-NCR, Haryana, Rajasthan, UP, and Gujarat with 50+ MW commissioned across factories, warehouses, and manufacturing plants.

What Is a Solar EPC Company?

EPC stands for Engineering, Procurement, and Construction. A solar EPC company in India is a single accountable contractor that designs your plant, sources the modules, inverters, structures, cables, and switchgear, and physically builds and commissions the system on your roof or land. The EPC contractor delivers a turnkey output: a working solar plant with measured generation, grid synchronization, and net metering approval — under one contract, one warranty umbrella, and one point of accountability.

This contrasts with the legacy approach where a factory owner would hire a consultant for design, buy modules and inverters separately, and engage a local civil contractor for installation. That model leaves the buyer carrying integration risk: if the inverter doesn't talk to the modules' optimizer, who pays? With a solar EPC company in India, the contractor owns that risk end-to-end.

The EPC Scope of Work

A complete industrial solar EPC scope covers:

Phase	Activities	Typical Duration
Feasibility & Design	Site survey, shadow analysis, structural audit, single-line diagram, PVsyst yield report, BOQ	2–3 weeks
Approvals	DISCOM net metering application, electrical inspector liaison, CEIG approval	4–8 weeks (parallel)
Procurement	Module, inverter, structure, cable, switchgear, monitoring kit ordering	4–6 weeks
Civil & Mechanical	Roof preparation, mounting structure installation, walkways, earthing	3–5 weeks
Electrical	DC cabling, string combiner boxes, inverter installation, AC panels, transformer interface	2–4 weeks
Testing & Commissioning	Insulation, polarity, IV curve testing, grid synchronization, performance ratio test	1–2 weeks
Net Metering & Handover	Meter installation, DISCOM commissioning, training, manuals	2–4 weeks
O&M (post-handover)	Cleaning, monitoring, fault rectification, annual performance reporting	5–25 years

A reputable solar EPC contractor in India will commit to this entire scope under a fixed-price contract with liquidated damages for delays.

Why Choose a Solar EPC Company Over Other Models?

Indian industrial buyers have three procurement routes:

EPC + self-owned (CAPEX) — You hire a solar EPC company in India, pay upfront, and own the plant. Best for buyers with capital and high power consumption (₹15+ lakh monthly bills) wanting maximum lifetime savings.
RESCO/OPEX — A developer (often the same EPC firm wearing a different hat) builds and owns the plant on your roof, sells you energy at a discounted tariff via a 15–25 year PPA. Zero capex.
Open Access — You procure solar from an off-site plant via the grid, paying wheeling and banking charges to the DISCOM. Best for very large consumers (1+ MW load).

For most factory owners, the EPC route delivers the lowest levelized cost of energy (LCOE) over 25 years — typically ₹2.0–2.5/kWh against grid tariffs of ₹8–10/kWh. The RESCO model trades that lower LCOE for zero-investment convenience. Open access works for buyers who can't host on-site solar but have high consumption.

How to Identify the Best Solar EPC Company in India

Not every contractor calling itself a solar EPC company in India is one. The market has thousands of installers; the top solar EPC contractors in India that can actually deliver industrial-grade plants number in the low hundreds. Use this checklist.

1. ALMM-Listed Tier-1 Module Supply

The best solar EPC company in India will supply only modules from the MNRE's ALMM (Approved List of Models and Manufacturers). As of 2026, that means brands like Waaree, Adani Solar, Vikram Solar, Premier Energies, Goldi Solar, Tata Power Solar, ReNew, and Trina Solar (India-manufactured). Avoid contractors offering "imported Chinese modules at 15% lower price" — these don't qualify for net metering, government incentives, or accelerated depreciation in most states.

Read our deep-dive comparison: Waaree vs Trina solar panels India.

2. Tier-1 Inverter Brand

For industrial plants 100 kW and above, the inverter is the most critical component. Tier-1 string inverters used by the top solar EPC contractors in India:

Sungrow — Highest market share in Indian C&I segment, excellent monitoring (iSolarCloud)
Huawei — Smart string inverters with module-level optimizers, strong in MW-scale
Sineng — Chinese central inverters for ground-mount, competitive pricing
Solis (Ginlong) — Cost-effective for sub-100 kW
Schneider Electric / ABB / Fronius — Premium European, 15-20% cost premium

Avoid: unbranded inverters or "OEM" rebadges. Read our string vs central inverter comparison to match the right topology to your project.

3. Mounting Structure Quality

The mounting structure is what most contractors quietly cut corners on. A genuine solar EPC company in India will use:

Hot-dip galvanized (HDG) Mild Steel, IS-2062 Grade, 80–120 micron coating, OR
Mill-finish Aluminium 6063-T6 for cleaner aesthetics on architectural roofs
Module clamps from Schletter, K2 Systems, or Ironridge (avoid generic clamps)
Wind load design certified for site-specific basic wind speed (per IS-875 Part 3)

Cheap structures fail in 8–10 years against the 25-year module life — reroofing then becomes a financial disaster.

4. End-to-End Project Management

A real solar EPC contractor in India runs:

A licensed Electrical Engineer as project manager
An in-house DISCOM liaison team (not outsourced)
A QA/QC engineer who signs off on each milestone
A safety officer for sites above 100 kW
A documented project schedule with weekly progress reports

If the firm offering to be your solar EPC company in India can't introduce you to these people on a Zoom call, walk away.

5. Meaningful References

Demand:

A list of 20+ similar projects (same kW range, same industry) with contact details
Permission to call 3 references unannounced
Site visits to 2 operational plants commissioned 2+ years ago — to see how the structure and modules have aged
Performance ratio (PR) data, not just nameplate capacity

The top solar EPC contractors in India will have nothing to hide. Anyone who refuses these requests is hiding something.

6. Financial Stability

A best solar EPC company in India should have:

Audited turnover of ₹50+ Cr (smaller for sub-MW projects)
Clean credit record (verify via CIBIL Commercial)
Bank guarantee capability for 10% performance BG
Insurance coverage including CAR (Contractor's All Risk) and Workmen's Compensation

Solar EPC is a 25-year commitment. The contractor must outlive the warranty.

Solar EPC Cost in India: 2026 Benchmarks

Here is the current pricing landscape for a credible solar EPC company in India (industrial scale, ALMM Tier-1 supply, 5-year O&M included):

System Size	Cost per Wp (₹)	Cost per MW (₹ Cr)	Cost per kW (₹)
100–250 kW (small C&I)	38–44	—	38,000–44,000
250–500 kW (mid C&I)	36–42	—	36,000–42,000
500 kW – 1 MW	35–40	3.5–4.0	35,000–40,000
1–5 MW (industrial)	33–38	3.3–3.8	33,000–38,000
5–10 MW (utility scale)	30–35	3.0–3.5	30,000–35,000
10+ MW	28–33	2.8–3.3	28,000–33,000

Average industrial solar EPC cost in India for a 1 MW rooftop plant is ₹3.5–4.0 Cr in 2026, down from ₹4.0–4.5 Cr in 2024 thanks to module price decline and BCD adjustments. See our solar EPC cost per MW deep dive for state-by-state and roof-type breakdowns.

What's Included vs Excluded

A complete solar EPC company in India quote should include:

All BoS (modules, inverters, structures, cables, ACDB/DCDB, SLD, monitoring)
Civil and electrical labor
Net metering application and DISCOM coordination
Insulation testing and commissioning certificates
1-year free O&M, with 5-year AMC option
25-year linear power warranty on modules (manufacturer's warranty)
10-year inverter warranty (manufacturer + EPC top-up)
5-year structure warranty

Watch for these exclusions buried in fine print:

Transformer upgrade if existing capacity is insufficient (₹15–25 lakh extra)
Roof reinforcement for old metal sheet roofs
Replacement modules for early-life failures (some contractors won't honor before payment received from manufacturer)
Lightning protection if not on the existing building

Top Solar EPC Companies in India: Categories

The Indian solar EPC market has three tiers of solar EPC contractors, each suitable for different project sizes:

Tier 1: National Players (10+ MW projects)

The largest top solar EPC contractors in India by commissioned capacity:

Tata Power Solar — Pioneer, decades of experience, premium positioning
Adani Solar (Mundra) — Vertically integrated module + EPC
Vikram Solar — Module manufacturer with EPC arm
Sterling & Wilson Solar — Global, large utility-scale
L&T Construction — Large industrial and utility EPC
Mahindra Susten — Strong project finance integration
ReNew Power — IPP turned EPC
Hero Future Energies — IPP and EPC

Best for: 10+ MW utility, large captive (5+ MW), or buyers who require Fortune-500 vendor compliance.

Tier 2: Strong Regional / C&I Specialists (1–10 MW)

These solar EPC companies in India focus on C&I and have deep state-level expertise:

Sun Wave Technologies (Faridabad) — Industrial focus, Delhi-NCR/Haryana/Rajasthan
Amplus Solar (Petronas-owned) — Large C&I rooftop and open access
Cleanmax Solar — Strong RESCO/PPA model
Fourth Partner Energy — Commercial rooftop and group captive
Avaada Energy — Utility plus C&I

Best for: 1–10 MW industrial rooftops, group captive deals, RESCO arrangements.

Tier 3: State / City-Specific Installers (less than 1 MW)

Hundreds of local installers serve the sub-MW market. Quality varies enormously. The best solar EPC company in India at this tier will have local DISCOM relationships and quick service response — but verify ALMM compliance and references rigorously.

Project Timeline: What to Expect

A standard 1 MW factory rooftop solar EPC project follows this critical path:

Week	Milestone	Owner
0	LOI / advance payment	Buyer
1–3	Site survey, structural audit, PVsyst report	EPC
2–4	DISCOM application filed	EPC
3–4	Final design, BOQ frozen	EPC
4–8	Module + inverter procurement	EPC
6–10	Structure manufacturing	EPC
8–12	DISCOM technical feasibility approval	EPC + DISCOM
9–13	Mounting structure installation	EPC
11–15	DC + AC electrical works	EPC
13–16	Testing, internal commissioning	EPC
14–17	DISCOM final inspection	EPC + DISCOM
15–18	Net meter installation, grid sync	DISCOM
16–18	Handover, training, O&M starts	EPC → Buyer

Realistic end-to-end: 120–130 days for 1 MW. A solar EPC company in India that promises 60-day commissioning is either skipping safety inspections or has rare DISCOM expedite — verify which.

Red Flags: Avoid These Solar EPC Contractors in India

Walk away from any prospective solar EPC company in India that:

Refuses to share a sample contract. A reputable EPC firm has a templated MSA they're proud of.
Demands more than 30% upfront. Standard payment terms are 20–30% advance, 40–50% on material delivery, 20% on commissioning, 5–10% retention against PR test.
Won't put PR or generation guarantees in writing. A real EPC commits to 80%+ first-year PR, with monetary penalties below.
Cannot show ALMM-listed module invoices on past projects.
Quotes 25-30% below market. They are skipping something — likely structure quality, inverter brand, or QA/QC.
Has no in-house team. Pure traders sub-contracting everything add risk and cost without expertise.
Is unwilling to introduce their PM, QA lead, and DISCOM liaison person.
Has no operational projects you can visit. Everyone has photos. Insist on physical visits.

Solar EPC Contracts: Key Clauses to Negotiate

When you've shortlisted your solar EPC company in India, the contract is where value is preserved or lost.

Performance Guarantees

Insist on a first-year PR guarantee of 80%+ with linear penalties: ₹X per percentage point shortfall. The penalty should reach ₹3–5 lakh per MW for a 5-point miss.

Liquidated Damages

Standard delay LDs: 0.5% of contract value per week of delay, capped at 7.5–10%. The best solar EPC contractors in India accept this; weaker firms try to cap LDs at 2%.

Defect Liability Period (DLP)

Minimum 24 months DLP from commissioning, during which the EPC fixes any defect at no charge.

Performance Bank Guarantee (PBG)

10% of contract value, valid for 12 months post-commissioning. Protects you against EPC default.

O&M Terms

The base contract should include 1-year free O&M with measurable SLAs:

Cleaning every 30 days (industrial), 15 days (high-dust)
Monitoring response within 4 hours
Fault rectification within 48 hours
Annual PR report with deviation analysis
Module-level Iv testing every 12 months on a 10% sample

Beyond year 1, an O&M AMC at ₹40,000–60,000 per MW per year is fair pricing.

Warranty Pass-Through

Verify the EPC contractually passes through full manufacturer warranties (25 years linear power on modules, 10 years inverter). Some contractors quietly limit liability to 5 years on a 25-year asset — unacceptable.

Sun Wave Technologies as Your Solar EPC Company in India

Sun Wave Technologies operates as a focused industrial solar EPC company in India. We work primarily with factories, warehouses, and manufacturing plants across:

Delhi-NCR: Faridabad, Gurugram, Noida, Ghaziabad
Haryana: Faridabad, Gurugram, Manesar, Bawal, Sonipat, Panipat, Karnal, Hisar
Rajasthan: Bhiwadi, Neemrana, Alwar, Jaipur, Jodhpur
UP: Greater Noida, Bulandshahr, Meerut
Gujarat: Ahmedabad, Sanand, Vadodara, Surat

Our approach as a solar EPC contractor in India:

CAPEX, RESCO, Open Access, and Group Captive — we offer all four commercial models
In-house engineering and DISCOM teams — no sub-contracting of approvals
ALMM Tier-1 only — Waaree, Adani, Vikram, Trina, Premier
Sungrow / Huawei inverters as default for industrial scale
Hot-dip galvanized IS-2062 structures with 25-year corrosion warranty
5-year O&M AMC included in base contract pricing
Performance ratio guarantee with documented LDs

Frequently Asked Questions

What does a solar EPC company in India do exactly?

A solar EPC company in India provides Engineering (system design, PVsyst yield estimation, structural calculations), Procurement (sourcing modules, inverters, structures, cables, monitoring kit), and Construction (civil, mechanical, and electrical installation). The EPC contractor delivers a turnkey, commissioned, grid-synchronized solar plant with net metering approval, under a single contract with single-point accountability for performance and warranty.

How much does industrial solar cost from an EPC company in India?

Industrial solar EPC cost in India ranges from ₹35–40 per Wp (₹3.5–4.0 Cr per MW) for 1 MW rooftop plants in 2026, dropping to ₹30–33 per Wp for utility-scale ground-mount above 5 MW. Costs include ALMM Tier-1 modules, Sungrow/Huawei inverters, hot-dip galvanized structures, complete BOS, civil and electrical installation, DISCOM net metering, and 1-year free O&M.

How do I identify the best solar EPC company in India for my factory?

The best solar EPC company in India for your factory will (1) supply only ALMM-listed Tier-1 modules, (2) use Sungrow or Huawei inverters for industrial scale, (3) have an in-house engineering team and DISCOM liaison, (4) commit to 80%+ first-year PR with monetary penalties, (5) offer 5-year O&M AMC, (6) provide 20+ verifiable industrial references in your kW range and industry, and (7) have audited turnover of ₹50+ Cr with clean credit history.

What's the difference between a solar EPC contractor and a solar installer?

A solar EPC contractor delivers turnkey design-procure-build for industrial-scale projects with engineering rigor, performance guarantees, multi-year O&M, and warranty pass-through. A solar installer typically handles smaller residential and small commercial projects (under 100 kW) with simpler scope and lower technical depth. For factory rooftops above 100 kW, you need a solar EPC company in India, not an installer.

How long does a solar EPC project take in India?

A 1 MW industrial rooftop solar EPC project in India takes 120–130 days from PO to net-metered commissioning, including 30–60 days for DISCOM net metering approval. Sub-100 kW projects can be done in 60–75 days. Projects above 5 MW typically run 150–180 days. Schedule slippage of more than 4 weeks should trigger LD enforcement under the EPC contract.

Should I choose CAPEX, RESCO, or Open Access from my solar EPC company?

Choose CAPEX (own the plant, EPC builds it) if you have capital, high consumption (15+ lakh monthly bills), and want maximum 25-year savings — typical IRR of 22–28%. Choose RESCO/OPEX if you want zero capex, immediate energy savings of 15–25% off grid tariffs, and prefer to avoid asset ownership. Choose Open Access if your load is 1+ MW and rooftop space is insufficient. The best solar EPC contractors in India offer all three.

What warranties should I get from my solar EPC company in India?

A reputable solar EPC company in India will pass through a 25-year linear power warranty on modules (manufacturer), 10-year warranty on string inverters and 5 years on central inverters (manufacturer + EPC top-up), 5-year warranty on hot-dip galvanized mounting structures, 12-month performance bank guarantee for 10% of contract value, and a 24-month defect liability period during which all installation defects are rectified at no cost.

Are top solar EPC contractors in India different from solar developers?

Yes. A solar EPC contractor builds your plant for a fixed fee — you own it. A solar developer (also called RESCO operator or IPP) builds and owns the plant on your roof, then sells you energy under a long-term PPA. Many top solar EPC contractors in India also offer developer/RESCO services as a separate commercial model. Confirm which role you're hiring them for.

What is ALMM and why does it matter when choosing a solar EPC company?

ALMM (Approved List of Models and Manufacturers) is MNRE's mandatory list of solar module manufacturers eligible for grid-connected projects, government incentives, and net metering in most states. A reputable solar EPC company in India supplies only ALMM-listed modules. Non-ALMM modules may be 10–15% cheaper but disqualify your plant from net metering, accelerated depreciation, and bank financing — a poor trade-off.

Sources & Related Reading

Sun Wave Technologies — Industrial solar EPC company in India. Faridabad, Delhi-NCR.

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