Apartment Solar Made Easy: Virtual/Group Net Metering for RWAs (2025 Guide)

Housing societies can slash common-area bills with rooftop solar—without wiring every flat. Here’s how Virtual/Group Net Metering works in India, when to choose on‑grid vs hybrid, and what RWAs should check before signing.
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What model fits?
On‑grid (most RWAs): Lowest upfront cost; exports offset lifts, pumps, lighting bills via net metering.
Hybrid: Add batteries if your society faces frequent outages and needs backup for lifts/pumps.
Virtual/Group Net Metering (where available): One plant’s export can be apportioned to multiple consumer meters (common areas and sometimes member flats). Confirm availability and rules with your state/DISCOM.
Sizing thumb rule: Start with common-area monthly kWh ÷ 120 ≈ kW. Validate roof area (≈ 100 sq ft per kW) and structural capacity.
Commercials to compare: Capex vs RESCO (OPEX), tariff escalation, clauses for performance guarantees, and net‑metering caps/transformer limits.
Safety & compliance: Hot‑dip galvanised MMS, Type‑II SPD (AC & DC), dedicated earthing pit, DC isolators, and periodic torque checks—especially before monsoon.
Paperwork checklist: Society resolution, latest electricity bills, single‑line diagram, vendor empanelment proof, and net‑metering application on the DISCOM portal.
Subsidy note: PM Surya Ghar primarily targets residential rooftop—check current eligibility for group/communal setups and state-specific support.
Call to Action
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