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Savings come from directly offsetting retail-tariff units you'd otherwise buy from your DISCOM, plus net metering, which credits any daytime surplus against what you draw at night. A correctly sized system on an unshaded, south-facing roof typically cuts bills by 70–90%; homes with partial shading, an undersized system, or heavy night-time load will land closer to the lower end. Run our solar calculator with your actual monthly bill for a number specific to your consumption, not the general range.

Most quality solar modules are designed for 25+ years of operation, with output degrading gradually rather than dropping off a cliff — typically around 0.5–0.7% per year for Tier-1 panels. Product and performance warranty terms vary by manufacturer and model, so check the specific warranty on the panels you're quoted rather than assuming a blanket figure. Inverters have a shorter service life, usually 10–15 years, and are typically replaced once during a system's lifetime.

It depends mainly on roof orientation, shading, and available area. South-facing, unshaded roofs generate the most; east- or west-facing roofs still work but yield somewhat less, and even partial shading from trees or neighboring buildings during peak sun hours can meaningfully cut output. As a rough guide, monocrystalline panels need approximately 80–100 sq ft of usable roof area per kW. A site visit is the only reliable way to confirm your roof's actual generation potential and the system size it can support.

PM Surya Ghar: Muft Bijli Yojana is the central government scheme funding residential rooftop solar, offering a subsidy of ₹30,000 for a 1kW system, ₹60,000 for 2kW, and a flat ₹78,000 for 3kW or larger — the amount is fixed nationwide and doesn't vary by state. It's disbursed as a direct benefit transfer, typically 30–45 days after your DISCOM completes the post-installation inspection and net-metering commissioning. We handle the application and inspection coordination so the subsidy isn't lost to paperwork errors or missed steps. Disclaimer: eligibility, CFA amounts, documentation requirements, timelines and approval are subject to applicable Government of India/MNRE guidelines and DISCOM procedures — Exergie Energy does not guarantee subsidy approval or a specific subsidy amount.

Physical installation for a typical residential system takes 2–3 days once site prep and approvals are done. The full timeline from consultation to commissioning is usually 2–4 weeks, and net-metering approval is the step most likely to add delay — DISCOM turnaround varies by state and can extend beyond the standard processing window during high-application periods.

Yes — panels keep generating on cloudy days by capturing diffused light, though output typically drops to roughly 25–40% of clear-sky peak, and heavier cloud cover reduces it further. This is a normal day-to-day fluctuation accounted for when sizing your system against your annual (not just sunny-day) consumption; a battery can also bank surplus from sunnier days to smooth out generation on darker ones.

Yes, across Hyderabad, Secunderabad, Warangal, Khammam, Nizamabad, Karimnagar, Nalgonda, and Mahabubnagar. Net metering here runs under TSSPDCL/TSNPDCL and the TSERC Rooftop Solar PV Regulation — the application fee is ₹2,500 for LT (most residential) connections, and permission is issued within 21 days of a complete application. We handle the DISCOM paperwork end to end.

Yes, across Vijayawada, Visakhapatnam, Guntur, Tirupati, Kakinada, Rajahmundry, Nellore, and Anantapur. APERC has waived the application fee and net-metering/meter cost for domestic rooftop systems up to 10kW installed under PM Surya Ghar, regardless of which AP DISCOM — APEPDCL, APSPDCL, or APCPDCL — serves your area, so most residential installs go through at no extra fee.

Yes, across Bengaluru, Mysuru, Mangaluru, Hubballi, Belagavi, and Kalaburagi. Since KERC's July 2025 reforms, low-tension domestic consumers up to 150kW no longer need a Power Purchase Agreement, and the entire application now runs through a single online portal — a meaningfully lighter process than before. BESCOM covers Bengaluru urban/rural and nearby districts; other regional DISCOMs cover the rest of the state.