Last updated: May 2026 · By Sri Ishaan Solar

Solar for Housing Societies & Apartment Complexes in Hyderabad 2026 — Common Area Solar

Every apartment complex in Hyderabad has a maintenance bill. Inside that bill, a large and often unnoticed item is the electricity cost for common areas — lifts, corridor lights, stairwell lights, overhead water pumps, underground sump pumps, security cameras, gate lights, and parking area lighting. For a mid-sized 30–50 flat complex, this can run ₹10,000–₹30,000 per month. Rooftop solar installed on the common terrace and connected to the society's common electricity meter can cut this cost by 50–90%, reducing monthly maintenance fees for every flat owner. This guide explains exactly how it works in Hyderabad.

Common Area Loads in an Apartment Complex

Before sizing a system, it helps to understand what consumes electricity in a typical Hyderabad apartment complex. The loads below are common to most multi-storey residential buildings:

• Lifts / elevators — 3-phase motor, typically 7.5–15 kW; the single largest common area load in buildings above 4 floors
• Water pumps — sump-to-overhead tank pump (1.5–5 HP), plus borewell pump if applicable; runs 1–3 hours/day
• Corridor and stairwell lighting — LED strips, motion sensors, common passage bulbs across all floors
• Security systems — CCTV cameras, DVR/NVR, video door panels, intercom units, electric gate motors
• Parking area lighting — basement or open-air lighting running from dusk to dawn
• Common area fans and exhaust — lobby fans, stairwell exhaust in enclosed buildings

The total common area consumption varies significantly by building size and amenities. A basic 20-flat walk-up building may use 200–400 units/month on common areas, while a 100-flat tower with a high-speed lift, amenity lighting, and multiple pumps may consume 1,000–2,000 units/month.

Electricity Bill and Solar Sizing by Complex Size

Estimates based on Hyderabad commercial/LT-Other tariff of approximately ₹7–₹9/unit. Actual savings depend on tariff category, common load profile, and solar generation (Hyderabad average ~4.5–5 peak sun hours/day). A 1kW solar system generates approximately 100–120 units/month in Hyderabad.

How Common Area Solar Works

The mechanism is straightforward and is the same net metering process that individual flat owners use, applied to the society's common meter:

1. Panels on the terrace — solar panels are installed on the flat (common) rooftop of the building. The terrace belongs to the society, so no individual flat owner's roof rights are needed.
2. Inverter in the common area — a grid-tied solar inverter (or hybrid inverter with battery if backup is needed) is installed in the stairwell, pump room, or dedicated electrical room.
3. Connected to the common meter — solar output feeds directly into the society's common electricity supply. During daytime, lifts, pumps, and lighting all run partly or fully on solar.
4. Net metering via TSSPDCL — surplus solar units generated when consumption is low (e.g., afternoons when pumps are idle) are exported to the grid and credited. These credits offset nighttime imports.
5. Monthly bill reduction — at the end of each billing cycle, you pay only for net units consumed (imported minus exported). The society's electricity cost drops proportionally, and the saving is passed on by reducing monthly maintenance charges.

Getting RWA Approval — Step by Step

The biggest practical challenge for housing society solar is not technical — it is getting the association to agree. Here is what is typically required:

1. Majority vote at AGM (Annual General Meeting) — most societies require a simple majority (50%+1) of flat owners to approve capital expenditure. Solar is increasingly easy to pass at AGMs given the direct, visible benefit of reduced maintenance fees. Put forward the projected saving per flat per month to make the case concrete.
2. NOC from the building owner / promoter — if the promoter or builder retains ownership of the terrace (common in newly constructed complexes), a No Objection Certificate is required before installing anything on the roof. In fully transferred societies, the association itself owns the common areas and no separate NOC is needed.
3. TSSPDCL consumer number for the common meter — the net metering application is filed using the society's existing common area electricity consumer number. Ensure the society has a valid, active connection in the association's name (not in an individual promoter's name — if it is, a name transfer may be required first).
4. Association bank account — the solar installer contract and DISCOM application should be in the association's name, with payment made from the association's account. This also protects individual members from personal liability.
5. TGREDCO-registered installer — TSSPDCL requires the solar system to be installed by a government-registered installer. Sri Ishaan Solar (TGREDCO Reg. TSRE260936) handles the DISCOM application, inspection, and bidirectional meter installation end to end.

Cost Per Flat — Detailed Example

Here is a worked example for a 20-flat complex in Hyderabad installing a 10kW common area solar system:

Savings estimate assumes TSSPDCL LT-Other tariff ~₹7/unit, 5% annual tariff increase, and 0.5%/year panel degradation. The society can collect the ₹25,500 per flat as a one-time special levy or spread over 12–24 monthly instalments added to maintenance.

Individual Flat Solar vs Common Area Solar — When Each Makes Sense

Both approaches can be combined: the society installs common area solar to cut maintenance electricity, and individual flat owners separately install solar on their allocated terrace space to cut their personal electricity bills. Many newer Hyderabad apartment complexes are moving towards this dual approach.

PM Surya Ghar Subsidy for Housing Society Common Meters

This is one of the most frequently asked questions by Hyderabad apartment associations, and the answer requires care:

The PM Surya Ghar Muft Bijli Yojana is structured around individual beneficiary households. A housing society's common area meter serves multiple units and is not treated as a domestic connection by TSSPDCL for the purposes of this scheme. The subsidy of ₹30,000 for 1kW, ₹60,000 for 2kW, and ₹78,000 for 3kW+ is available only when applied against an individual domestic consumer number.

However, this does not eliminate the business case. Common area tariffs in Telangana are lower than high-slab domestic tariffs, the system investment is shared across all flat owners, and there is no maximum system size restriction that applies to residential-only subsidised schemes. A 20kW or 25kW common area system is perfectly permissible under TSSPDCL net metering regulations.

What to Check Before Approaching Your RWA Committee

• How much is the current common area electricity bill? Get the last 6–12 months of the society's TSSPDCL bill to establish baseline consumption and tariff.
• Is there a clear terrace? A 10kW system needs approximately 600–700 sq ft of unshaded terrace (south-facing preferred). Overhead tanks, staircase towers, and AC outdoor units reduce available space.
• Is the wiring infrastructure in place? Older buildings (10+ years) may need wiring upgrades to handle solar inverter output safely — factor this into cost estimates.
• Is the common meter in the association's name? A name change from the builder's name to the RWA's name may be required before filing the net metering application.
• Does the RWA have a bank account? TSSPDCL may require the application to be in the association's name with a corresponding bank account for subsidy-related correspondence (even if the common meter is ineligible for PMSG, the institutional name match matters).

Why Sri Ishaan Solar for Your Apartment Complex

• TGREDCO Registered Installer (Reg. No. TSRE260936) — mandatory for TSSPDCL net metering approval in Telangana
• Experienced with both residential domestic and commercial/society-class DISCOM applications
• Site survey, terrace assessment, and load analysis at no charge before any commitment
• RWA presentation support — we provide a one-page savings projection you can put to the AGM
• 3-phase solar system design for buildings with lift and pump loads
• 25-year panel performance warranty, 5-year workmanship warranty, and optional Annual Maintenance Contract