Observed arrival · 2026-09-07
SolarBachat puts the solar maths on record
An India-specific rooftop-solar calculator estimates system size, subsidy, payback, and city-level rates from a household’s monthly electricity bill.
Field notes
SolarBachat describes a bill-led calculation rather than a product-size-first sales funnel: consumption, state tariff, roof area, expected generation, subsidy, and payback are connected in one model. Its visible assumptions include ₹58,000 per kW as an installed-cost benchmark, 108–128 monthly units per kW by state, 4% annual tariff escalation, and 0.6% panel degradation. The page also lists state and city rate coverage and explains the PM Surya Ghar subsidy figures it uses.
Observed signals
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Editorial observations of this landing page, not a rating.
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