How many kW you need, worked payback and EMI examples, on-grid versus hybrid and off-grid, batteries, housing societies and quotation checklists.
Once you know the rules, the next questions are practical. How many kW does your household need? How much roof area does that take? What will a 3 kW system save at your top slab rate, and when does the subsidy-adjusted cost come back? Is a battery worth adding where power cuts are common, and should it be lithium or lead-acid? How does a housing society or RWA put solar on a shared terrace?
The guides here answer those questions with step-by-step arithmetic. Every rupee figure that is not a published scheme amount is an illustrative example: replace it with the numbers from your own bill and your vendor's written quotation. Begin with how many kW of solar you need, then work through the payback examples.
The calculators let you repeat the arithmetic: the solar payback calculator with CFA, the solar loan EMI calculator, the system cost estimate by kW and the pre-installation checklist.
Sizing, Payback Examples and Checklists
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.
Sizing, Payback Examples and Checklists
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.
Sizing, Payback Examples and Checklists
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.
Sizing, Payback Examples and Checklists
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.
Sizing, Payback Examples and Checklists
How mono PERC, TOPCon, bifacial and half-cut solar modules differ, string inverters vs microinverters, and which specifications matter for hot, dusty Indian rooftops.
Sizing, Payback Examples and Checklists
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.
Sizing, Payback Examples and Checklists
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.
