← Full guide: Rooftop Solar Quote Comparison: Modules, Inverter, Structure, and Warranty

Turn three different-looking quotes into one comparable sheet

Turn three different-looking quotes into one comparable sheet. Check the cause, evidence to keep, recovery steps, and escalation.

Start here

Record module DC capacity and inverter AC capacity separately. Two “5 kW” quotes may not describe the same DC/AC design.

What applies to this exact problem

1. Normalize system size

Record module DC capacity and inverter AC capacity separately. Two “5 kW” quotes may not describe the same DC/AC design.

2. Lock exact equipment models

Ask for manufacturer, model number, quantity, ratings and warranty documents. Reject vague labels such as “Tier-1 panel” without a model.

3. Compare structural and electrical scope

Review mounting material, roof attachment, corrosion protection, cable lengths, isolators, earthing, surge protection, monitoring and shutdown labels.

4. Separate approvals from promises

List what the vendor will actually handle for DISCOM, net metering or scheme workflow and what remains your responsibility. Never treat an unapproved subsidy as guaranteed cash.

5. Compare payment and warranty risk

Prefer milestone-linked payments with clear deliverables. Check who provides product warranty, workmanship warranty and local service after installation.

Check these first

  • State the exact expected result and the exact result you have now.
  • Find the official record that owns the result and compare it with your evidence.
  • Change one thing at a time, then verify the final state before moving on.

Fix it in this order

  1. State the exact expected result and the exact result you have now.
  2. Find the official record that owns the result and compare it with your evidence.
  3. Separate hardware, installer, DISCOM/net-meter, portal, and subsidy status. They are different failure points.
  4. Record system size, module/inverter details, commissioning date, generation data, application IDs, and promised scope.
  5. Compare actual installation and generation with the signed quote, warranty, and portal/DISCOM records.
  6. Ask the responsible party for the exact pending action and owner of that action in writing.
  7. Do not close the job until safety checks, commissioning, monitoring, and applicable net-meter/subsidy records reconcile.

Build the proof pack

  • Signed quote and scope
  • Module/inverter serials and warranty
  • DISCOM/portal application IDs
  • Generation data, photos, and installer tickets

Avoid making the case harder

  • Paying the final amount before checking agreed milestones
  • Assuming low generation is automatically a bad panel
  • Treating installer completion as DISCOM/subsidy completion

How you know it is really fixed

  • The official record and your real-world result agree.
  • You have enough written evidence to prove the issue is finished if it returns later.

If it is still not fixed

  1. Installer/vendor grievance
  2. DISCOM/portal grievance route
  3. Consumer forum or other official remedy where appropriate

Official sources from the full guide

Need the complete context?

This page solves one branch. The parent guide covers the full decision, edge cases, alternatives, and related checks.

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