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THE SOLAR KNOWLEDGE HUB

Rooftop solar guides: understand your options before you choose.

Follow the question you have today. These practical guides explain system sizing, solar quotations, panels and inverters, net metering, loans and aftercare—each with official sources and a useful next step. Start with your bill, bring better questions to an installer, and keep control of the decision.

Sources checked:

YOUR DECISION, IN THREE STAGES

  1. Understand

    Your bill, roof and starting size

  2. Compare

    Written quotations and eligibility

  3. Prepare

    Applications, handover and service

What are you trying to understand?

How much solar do I need?

Usage, roof, units and panels

What should it cost?

Indicative cost by system size

How does subsidy work?

Amounts, eligibility and process

How do I compare installers?

Official checks and a working checklist

Which equipment should I ask about?

Grid type, models, DCR and ALMM

What happens after installation?

Net metering, inspection and commissioning

Practical answers, organised by topic.

The guides follow three questions. To know your numbers, start with how much solar you need and the calculator's cost table. To understand subsidy, read the scheme limits and process and, in UP, the state top-up. To choose an installer, use the quote checklist, then the guides on quotations, equipment, commissioning, handover and loans.

9 guides available

System sizing

How much solar does your home need?

Use a starting estimate to ask for a justified design, not to order a system without a site check.

Read the guideCost & installer quotes

How to read a solar quote before you sign

The cheapest complete quote and the cheapest headline are not necessarily the same offer.

Read the guideEquipment

Panels, inverters and eligibility: what to ask for

Keep the evidence attached to the exact equipment you receive.

Read the guideDISCOM & net metering

What happens between installation and commissioning?

Track installation completion and utility completion as separate milestones.

Read the guideMaintenance & handover

What to collect after installation

Agree the handover pack before the final payment milestone.

Read the guideFinancing

Questions to ask before taking a solar loan

Borrow only after understanding obligations without relying on an unapproved subsidy.

Read the guideSystem type

On-grid, off-grid or hybrid: which solar system suits your home?

Decide the backup you need first; the system type follows from that, not from a sales package.

Read the guideWarranty

Solar warranties explained: panels, inverter and installation

Ask for each warranty in writing, by name, before you compare prices.

Read the guideInstallation process

Rooftop solar installation process: from your bill to handover

Tie each payment to a stage that has actually been completed.

Read the guide

Turn reading into your next step.

Before you request a quote

Have your monthly units and roof context ready. Use an indicative starting estimate, then ask for a site assessment.

Open the solar calculator

Before you accept a claim

Check the state and DISCOM on your bill. UP and Delhi have different additional-support processes.

Prepare for a UP application

PM Surya Ghar

National Portal and applications

Official application destination. Automated access was blocked; open directly and check current instructions.

Access attempted: Direct check needed

UPNEDA

UP Solar Energy Policy 2022

Residential state support and reimbursement conditions; cross-checked against current linked material.

Checked: Rules can change

UPNEDA / MNRE

Model consumer–vendor agreement

Written equipment, price, responsibilities, maintenance and service terms. Adapt to the actual contract.

Checked: Rules can change