All guides

What DCR modules are, how MNRE's ALMM lists for modules and cells work, which BIS standards apply to panels, inverters and batteries, and how to check them before installation.

GST on solar power generators, modules and solar devices fell from 12% to 5% from 22 September 2025. How it applies to home systems, batteries and installation invoices.

How net metering, gross metering and net billing work for home rooftop solar in India, what the Consumer Rules say about the 500 kW limit, and how to read your state's rules.

The steps to register, apply, choose a registered vendor, get DISCOM approval, net metering and claim the rooftop solar subsidy on the PM Surya Ghar portal, with documents.

How much central financial assistance PM Surya Ghar: Muft Bijli Yojana gives per kW, who is eligible, how state top-ups and RWAs work, and when the money is paid.

What a home rooftop solar system costs in India in 2026, how PM Surya Ghar subsidy, net metering, GST and your tariff decide the payback period, with worked examples.

How collateral-free rooftop solar loans under PM Surya Ghar work at public sector banks, repo-linked interest, margin money, documents and worked EMI examples.

Compare lithium-ion (LFP) and tubular lead-acid batteries for home solar and backup in India: usable capacity, cycle life, cost per stored unit, safety, GST and disposal.

How apartment societies and RWAs in India can install rooftop solar for common areas, the PM Surya Ghar CFA of ₹18,000 per kW, approvals, metering options and cost sharing.

Size a home rooftop solar system in India from your monthly units, roof area and sanctioned load, with the thumb rules, a step-by-step method and worked examples.

How on-grid, hybrid and off-grid home solar systems differ in India, what happens in a power cut, which qualify for PM Surya Ghar subsidy, and how to choose.

How mono PERC, TOPCon, bifacial and half-cut solar modules differ, string inverters vs microinverters, and which specifications matter for hot, dusty Indian rooftops.

Step-by-step payback arithmetic for 1 kW, 3 kW and 5 kW home rooftop systems in India, with subsidy, tariff, surplus and 25-year savings, all marked illustrative.

What a rooftop solar quotation in India must include, how to compare two vendors fairly, red flags, payment terms and the documents to collect, with a worked comparison.

Why DISCOM feasibility approval, inspection and net meter installation for rooftop solar get delayed in India, what the Consumer Rules expect, and how to follow up and escalate.

How fraudsters pose as PM Surya Ghar officials or vendors in India, the warning signs of fake portals and fee demands, and what to do if you have paid or shared an OTP.

The most common rooftop solar mistakes Indian households make, from non-DCR modules to fake portals and oversizing, and the official bodies to check each rule with.

Where to complain about rooftop solar problems in India: DISCOM delays to the CGRF and Electricity Ombudsman, vendor disputes to the National Consumer Helpline and consumer commissions.

Why a rooftop solar system in India produces fewer units than promised: dust, shade, heat, monsoon, inverter faults and wiring, with a step-by-step check and maintenance routine.

Why the PM Surya Ghar rooftop solar subsidy gets stuck after installation, how to check status, fix bank and document issues, and where to raise a grievance.

How rooftop solar warranties work in India for modules, inverters, batteries and installation, what voids them, how to file a claim and what to do if it is refused.