Straight answers on cost, payback, feasibility, commercial models and regulations, written for plant heads and CFOs, not for search engines.
Between the nameplate and your meter sits a stack of quiet losses. How soiling, heat and downtime erode generation, and what good O&M and a healthy performance ratio protect.
Read guide Finance8 min readHow the 40% + 20% first-year write-off works, what the concessional 22% tax regime changes, and an illustrative example. General information, not tax advice.
Read guide BIPV7 min readBuilding-integrated PV replaces cladding and glazing with generation. Where facade and skylight solar makes sense in South India, the yield trade-offs, and when it pays.
Read guide Storage8 min readBatteries rarely pay on energy savings alone. When demand charges, time-of-day tariffs, diesel offset and backup stack up to justify storage for a C&I plant.
Read guide Economics9 min readWhat a factory rooftop plant really costs, how the savings stack up against an ₹8–11/unit HT tariff, and why sizing to daytime load decides your payback.
Read guide Feasibility8 min readThe 12 checks, roof, structure, shading, load profile, sanctioned load, DISCOM, that decide whether your factory or warehouse is solar-ready.
Read guide Subsidy2 min readPM Surya Ghar plus tnebltd.gov.in/usrp: steps, documents, timelines and where applications get stuck.
Read guide Subsidy2 min read₹35,000, ₹70,000 or ₹1 lakh by system size, the 5 August 2026 cut-off, and why to apply early.
Read guide Institutions2 min readA 300 kWp engineering college worked through, holidays, and zero-investment RESCO for trusts.
Read guide Subsidy6 min read₹30,000 to ₹78,000 central subsidy, the new ₹22,000 state top-up, and the TNPDCL application step by step.
Read guide Cost6 min read1 kW to 10 kW home prices with subsidy, and 100 kW to 1 MW commercial plants per watt.
Read guide Cost7 min readIndicative turnkey price bands by capacity, what moves the number up or down, and how per-watt cost falls as you scale.
Read guide Commercial models8 min readOwn it, pay per unit, or scale beyond the roof. A plain-English comparison of upfront, ownership, payment and who each model suits.
Read guide Regulatory7 min readHow net vs gross metering and banking affect your project economics, and why net-billing states reward sizing to self-consumption.
Read guide Structural6 min readDead load plus wind uplift is where cheap proposals cut corners. What a real structural assessment checks before a single panel is ordered.
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