Consumer Corner
Everything you need to know about On-Grid Solar, WBSEDCL Net Metering regulations, and Central Government subsidies in West Bengal.
How On-Grid Solar Works for You
An engineering overview of synchronization between your rooftop solar plant, domestic electrical panel, and the WBSEDCL power distribution utility.
Daytime Self-Consumption
Solar PV modules convert natural sunlight directly into direct current (DC) electricity. The on-grid inverter immediately transforms this into 230V/415V alternating current (AC), prioritizing your running appliances (fans, lights, ACs, motors) instantaneously without batteries.
Bi-Directional Energy Export
When your solar generation exceeds your home or facility consumption during peak afternoon hours, the excess energy is automatically exported into the WBSEDCL local grid infrastructure through a government-approved bi-directional net meter.
Nighttime Grid Power
At sunset, your system smoothly draws standard electricity from the WBSEDCL grid. There is zero disruption, voltage flicker, or switch-over lag. You consume the banked solar units generated during the daytime.
Digital Bi-Directional Meter
Installed by WBSEDCL authorized technicians, this smart digital meter independently registers two core variables: Import (energy consumed from grid) and Export (surplus clean units fed into grid). Your bill calculates purely on Net Units.
Automatic Safety Anti-Islanding Protection
If the central utility line suffers an outage or scheduled maintenance, on-grid inverters immediately shut down export current within 20 milliseconds. This strictly prevents hazardous back-feeding into external transmission lines.
Frequently Asked Questions
Clear, transparent technical guidelines vetted by our certified rooftop electrical engineers.
1. What is an On-Grid Solar System and how does it work?
An On-Grid (or Grid-Tied) Solar System is connected directly to your local electricity utility provider (WBSEDCL in West Bengal) without needing chemical battery banks. The system contains two core elements:
- Solar PV Modules (Mono-PERC/Bifacial): Convert natural daylight photon energy into high-voltage Direct Current (DC).
- Grid-Tie Inverter: Intelligently synchronizes with WBSEDCL's exact frequency (50Hz) and operational grid voltage (230V Single Phase or 415V Three Phase).
When your solar plant generates more electricity than your immediate domestic or industrial demand, the surplus automatically streams into the WBSEDCL grid through a Bi-Directional Net Meter. When your power demand exceeds generation or during night hours, electricity flows seamlessly back from the grid.
2. Will Solar work during cloudy days or during power cuts?
Yes, solar panels still generate electricity on cloudy days, though at a reduced capacity compared to direct sunlight. However, an On-Grid system will automatically shut down during a grid power cut. This is a mandatory safety feature called "anti-islanding" to protect utility workers who may be repairing the lines.
3. Can an On-Grid Solar System reduce my electricity bills to near zero?
Absolutely! Through net metering, the surplus electricity you export during the day offsets the electricity you import at night. If your system is sized correctly to match your annual consumption, your net electricity bill can drop to zero, leaving only fixed meter charges.
4. Does an On-Grid Solar System require daily maintenance or battery replacements?
No daily maintenance is required. Without batteries, On-Grid systems are virtually maintenance-free. Occasional cleaning of the solar panels (removing dust/bird droppings) every few weeks is sufficient to maintain optimal generation efficiency.
5. How do I know which solar system size (kW) is required for my home or factory?
System size is calculated based on your monthly electricity consumption (units/kWh), available shadow-free rooftop space, and connected load. Our engineers will perform a free site survey and analyze your electricity bills to recommend the perfect capacity.
6. Can I install solar panels on my rooftop? What are the roof requirements?
Solar panels can be installed on RCC (flat concrete) roofs, sloped tiled roofs, or industrial tin sheds. You need a shadow-free area (typically 100 sq.ft per kW) facing South for maximum generation. Our structural engineers design customized mounting structures for any roof type.
7. What government subsidies are available under PM Surya Ghar Muft Bijli Yojana in West Bengal?
Under the PM Surya Ghar scheme, residential consumers can avail Central Financial Assistance (CFA). Subsidies are substantial for systems up to 3kW, and flat amounts for systems above 3kW. We handle the entire portal registration and subsidy claim process for you.
8. How can I contact M/S UJJWAL ROY for an on-site feasibility survey?
You can use the Contact Dashboard form above, call our helpdesk, or email us. As a WBSEDCL empaneled vendor, we provide comprehensive end-to-end services from feasibility survey to net-meter commissioning.
Documents & Regulatory Downloads
On-Grid Solar Consumer Handbook (West Bengal Edition)
Complete consumer handbook explaining solar net metering, inverter synchronizing principles, safety islanding, and expected quarterly unit production in North Bengal.
WBSEDCL Net-Metering Application Checklist & Documentation Guide
Mandatory paperwork roster: Latest WBSEDCL bill copy, Aadhaar verification, roof ownership deeds, sanctioned load enhancement letters, and contractor NOC formats.
PM Surya Ghar National Portal Registration Steps
Illustrated user manual on creating an account on the national portal, selecting M/S UJJWAL ROY as your enlisted installer, and completing your Direct Benefit Transfer bank details.
Solar Rooftop Technical Specifications & Maintenance Protocol
Certified structural datasheets: GI structure wind-speed ratings (150 km/h), IP65/IP66 inverter casing ingress thresholds, lightning arresters, and earth-pit resistance standards.
Still have questions or need a personalized calculation?
Determine your exact payback timeline, monthly unit savings, and central government subsidy allowance in less than two minutes with our customized North Bengal solar calculator.