Solar guides for installers in India

Guides on the rules that shape a solar quotation in India, each tied to the official source it relies on. They explain what a rule asks for, what it does not decide, and what to confirm yourself before you promise a customer anything, since schemes and lists change by dated order.

Last updated 13 Oct 2026

• DCR vs non-DCR solar modules

  What separates DCR from non-DCR solar modules, which schemes ask for DCR, how it differs from ALMM listing, and how to word the module line on a quotation.

• How to choose quotation software

  A neutral checklist for choosing solar quotation software: the criteria to test, who each approach suits, and when a tool is not a fit for you.

• How to compare solar quotations

  A buyer guide to comparing solar quotations from different installers: match capacity and scope first, then check the bill of materials, inclusions and terms.

• GST on solar quotations

  How GST is shown on a solar quotation in India: CGST and SGST versus IGST, the state check, separate supply and installation lines, and what to confirm.

• Roof space needed for solar

  How to work out the roof space a solar system needs: usable area, shade, spacing and module size, as a method you can repeat, with the assumptions to state.

• Solar pump sizing

  A method for sizing a solar pump array from the water the farm needs: head, pump and drive datasheets, array losses and the assumptions to state.

• Warranty terms in quotations

  What a solar quotation should say about warranty: which items are covered, who honours each warranty, how to claim and what to copy from the maker's documents.

• Payment terms and milestones

  Options for payment terms in a solar quotation: tie each payment to a delivered stage, allow for a subsidy paid afterwards, and put the schedule in writing.

• Solar quotation follow-up

  How to follow up on a solar quotation without pressure: when to call, what to ask, which questions to expect and how to record the outcome.

• PM Surya Ghar installer process

  How a rooftop job moves under PM Surya Ghar: portal application, a registered vendor, DISCOM approval, installation, inspection documents and commissioning.

• Net metering application steps

  What a net metering application for rooftop solar involves: who applies, what the DISCOM does, and which details your state regulator decides.

• PM-KUSUM solar pump process

  How a PM-KUSUM standalone solar pump application usually runs: the state nodal agency, farmer registration on a state portal, and the quotation.