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Find clear, engineer-verified answers about rooftop solar installations, DISCOM net-metering protocols, PM Surya Ghar central subsidies, commercial accelerated depreciation, and lifetime preventive AMC.
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Popular Questions
Verified by A2S Senior Engineering Lead • West Bengal & Assam Operational Footprint
A grid-tied rooftop solar system generates electricity from the sun during the day and feeds it directly into your building's electrical panel. Any excess power is exported to the DISCOM grid via a bi-directional net meter.
A properly sized solar plant can reduce your electricity bill by 80% to 100%. The exact savings depend on your roof space, current tariff slab, and daily consumption patterns.
Typically, you need about 80 to 100 square feet of shadow-free roof space for every 1 kW of solar panel installation using modern high-efficiency mono PERC modules.
Under the PM Surya Ghar scheme, residential consumers can receive a maximum central financial assistance (subsidy) of ₹78,000 for a system size of 3 kW or above.
A standard residential installation takes 2-4 weeks. The physical panel installation takes only 2-3 days, but DISCOM net-metering approvals and CEIG clearances make up the rest of the timeline.
Standard grid-tied systems shut down during power cuts for safety reasons (anti-islanding) to protect grid workers. To have power during outages, you would need a Hybrid solar system with battery storage.
HOME ROOFTOP SYSTEMS
Residential Solar FAQ
Tailored for independent villas, residential societies, and duplex properties across North Bengal.
Most RCC (concrete) roofs and sturdy metal sheds in North Bengal are highly suitable. Our engineers conduct a free site survey to assess structural integrity, shadow-free area, and optimal orientation for maximum generation.
A standard 3kW system generates around 12-15 units per day, while a 5kW system generates about 20-25 units per day on average, depending on the season and weather conditions.
Solar panels still generate electricity on cloudy or rainy days, though at a reduced efficiency (typically 30-50% of peak capacity). Thanks to net-metering, the surplus units you generated during sunny months cover your monsoon shortfall.
Yes, absolutely. A grid-tied solar system acts in parallel with the DISCOM grid. During the day, your heavy loads run primarily on solar power. If your loads demand more power than the panels generate, the grid seamlessly makes up the difference.
We offer end-to-end liaisoning. From initial feasibility study submissions to CEIG inspections and the final bi-directional meter installation by WBSEDCL, our dedicated team handles all the paperwork and local utility coordination for you.
Enterprise EPC
Technovate Corporate Park
350 kWp Commercial Rooftop Array
ENTERPRISE & INSTITUTIONS
Commercial Solar FAQ
Comprehensive engineering solutions for hospitals, colleges, cold storages, tea gardens, and office buildings.
We perform a detailed load analysis using your 12-month electricity bills, assess peak demand, and map your shadow-free roof area. The optimal capacity is designed to maximize your ROI without exceeding the sanctioned load limits set by the DISCOM.
Under Section 32 of the Income Tax Act, businesses can claim up to 40% depreciation on solar plants in the first year itself. This drastically reduces your taxable income, effectively allowing the government to indirectly subsidize your CAPEX.
No. For industrial metal roofs (trapezoidal or standing seam), we use non-penetrative aluminum clamps. For flat RCC roofs, we use chemical anchors sealed with industrial-grade waterproofing epoxies to guarantee zero leakage.
Every commercial plant includes enterprise-grade data loggers that transmit string-level telemetry to a cloud dashboard. You can monitor daily generation, PR (Performance Ratio), and carbon offset metrics in real-time on your phone or desktop.
HIGH TENSION (HT) & MEGAWATT SCALE
Industrial Solar Engineering FAQ
Engineered for manufacturing facilities, steel mills, cement hubs, rice mills, and industrial sheds across Eastern India.
Yes, our EPC division specializes in MW-scale industrial projects. We handle everything from HT side grid-integration and large-scale DC cable sizing to transformer upgrades and CEIG approvals for heavy industries.
Before any industrial installation, our civil engineers use STAAD-Pro software to model your factory shed. We analyze dead loads, live loads, and wind loads (up to 200km/h) to ensure your pre-engineered building (PEB) can safely support the solar array for 25 years.
We design and install custom LT/HT panels, vacuum circuit breakers (VCBs), and step-up transformers to seamlessly synchronize the solar plant's output with your existing 11kV or 33kV high-tension grid infrastructure.
Our tier-1 commercial inverters feature advanced reactive power control and active harmonic filtering. We ensure total harmonic distortion (THD) remains below 3% and the power factor is maintained near unity to avoid DISCOM penalties.
END-TO-END DELIVERY
Turnkey Solar EPC Framework
How our integrated Engineering, Procurement, and Construction model guarantees project bankability and zero execution risk.
E
Engineering
Precision Design & SimulationsDrone topographic terrain mapping
PVSyst generation forecasting
STAAD structural safety certifications
P
Procurement
Direct Tier-1 Supply ChainsTier-1 ALMM listed bifacial modules
German/Austrian engineering inverters
Hot-dip galvanized mounting structures
C
Construction
Statutory Liaison & Grid SyncCEIG statutory safety approvals
Zero-accident HSE site supervision
DISCOM net-meter commissioning
Turnkey EPC means we take complete, single-point responsibility for the entire project from concept to commissioning. You don't need to hire separate vendors for panels, installation, or DISCOM liaisoning. We hand over a fully operational, grid-synchronized plant.
Yes, our dedicated in-house liaisoning team manages the entire bureaucratic process. This includes feasibility approvals, net-metering agreements with WBSEDCL/CESC, and mandatory electrical safety clearances from the Chief Electrical Inspector to Government (CEIG).
We sign legally binding commercial EPC contracts that include strict execution timelines. If project commissioning is delayed due to our execution (excluding Force Majeure or DISCOM delays), we adhere to standard Liquidated Damages (LD) clauses to protect your investment.
PREVENTIVE OPERATIONS & MAINTENANCE
View Detailed AMC PackagesAnnual Maintenance Contracts (AMC)
Dust, bird droppings, and industrial smog can reduce solar generation by up to 20-30%. Structured AMC ensures monthly chemical-free cleaning, torque tightening, and electrical health checks to maintain peak PR (Performance Ratio).
Regular tap or borewell water contains dissolved salts and minerals (like calcium). When water evaporates off hot solar panels, it leaves behind a hard white scale (calcification) that permanently damages the anti-reflective coating. We exclusively use RO demineralized water.
Yes, for our MW-scale and premium commercial AMC clients, we conduct biannual drone thermography inspections using thermal imaging to detect micro-cracks, diode failures, and PID (Potential Induced Degradation) before they affect generation.
Yes. Our O&M division provides 3rd-party takeover services. We begin with a comprehensive plant health audit, recalibrate the inverters, repair any existing faults, and then transition the plant onto our standard AMC protocols.
MNRE Central Financial Assistance
PM Surya Ghar: Muft Bijli Yojana
Everything you need to know regarding application steps, eligibility guidelines, Direct Benefit Transfer (DBT), and direct financial subsidies up to ₹78,000.
₹78,000Max Direct DBT Subsidy
It is a central government scheme providing financial assistance for residential solar. The current slabs are: ₹30,000 for 1kW, ₹60,000 for 2kW, and a maximum of ₹78,000 for systems of 3kW and above.
Any residential electricity consumer with a valid electricity bill in their name and an RCC roof or structurally sound shed can apply. Commercial, industrial, and institutional consumers are not eligible for this specific subsidy.
You will need a recent electricity bill (under 6 months old), the applicant's Aadhar card, PAN card, a passport-sized photograph, a cancelled cheque for the DBT transfer, and the latest property tax receipt.
Yes, we handle the entire process from start to finish. From creating your profile on the National Portal (pmsuryaghar.gov.in) to submitting project completion reports and facilitating the final CEIG inspection for your DBT release.
Official Advisory: All government subsidies and central financial assistance are subject to prevailing MNRE guidelines, DISCOM quota approvals, and portal fund release timelines.
RETURN ON INVESTMENT
Solar Cost, Savings & Financial Payback
Clear economic math detailing initial capital investment, annual electricity savings, and amortized returns.
The benchmark cost typically ranges from ₹45,000 to ₹60,000 per kW, depending on the scale (residential vs. commercial), technology (Mono PERC vs. Bifacial), and structure height. Government subsidies will further reduce your net out-of-pocket investment.
For residential clients benefiting from the PM Surya Ghar subsidy, the payback period is typically 3 to 4 years. For commercial entities claiming Accelerated Depreciation (AD) benefits, break-even often occurs in just 2.5 to 3.5 years.
Electricity tariffs historically rise by 3-5% annually. When you install solar, you lock in your cost of power at near-zero for 25 years. As grid tariffs increase, your relative financial savings grow exponentially each year, pushing your lifetime ROI higher.
We provide highly accurate generation estimates using PVSyst simulations based on 20-year meteorological data for your specific GPS coordinates. While weather fluctuates daily, the annualized generation yield is highly predictable and bankable.
6-STEP COMMISSIONING JOURNEY
Installation Workflow & Protection
Our standardized turnkey procedure from engineering site survey to active net-meter grid export.
1
Site Audit
Shadow path & structural test
2
3D Modeling
Electrical SLD & DPR design
3
DISCOM Sanction
Portal approvals & token
4
Mounting & BOS
HDG structure & Tier-1 panels
5
Safety & Earthing
Copper pits & arrestors
6
Sync & DBT
Bi-directional meter activation
Every installation includes a dedicated copper Lightning Arrestor (LA) mounted above the panels, along with separate chemical earthing pits for the DC structures and AC inverters. We also install heavy-duty DC and AC Surge Protection Devices (SPDs) to shield against grid voltage spikes.
Upon commissioning, we set up a dedicated Wi-Fi data logger connected to your inverter. You receive login credentials for a mobile app (iOS/Android) where you can track real-time generation, historical yield graphs, environmental offsets, and system health alerts 24/7.
DIRECT TECHNICAL ADVISORY
Can't Find What You're Looking For?
Solar regulations, DISCOM rules, and roof structures differ for every property. Our senior solar engineers in Cooch Behar are available to answer your specific technical, financial, or net-metering queries.
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