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Solar System for a 3BHK House in Hyderabad
System Size, Cost, Subsidy and Payback — Complete 2026 Guide
Updated May 2026 | By Sri Ishaan Solar Team
The 3BHK is the most common residential configuration we install solar for in Hyderabad. But "3BHK" covers a huge range — a 3BHK in Kukatpally with 2 old split ACs, a TV, and a geyser has a very different electricity consumption profile from a 3BHK in Gachibowli with inverter ACs in every room, an EV charger, and a home office. This guide helps you find the right system size for your specific usage.
Typical 3BHK Electricity Consumption in Hyderabad
Hyderabad's climate means air conditioning is the dominant electricity load for most of the year. Here is a typical breakdown for a 3BHK:
| Appliance | Monthly Consumption (approx.) |
|---|---|
| 1 AC (1.5 ton, inverter, 8 hrs/day) | ~120–150 units |
| 1 AC (1.5 ton, non-inverter, 8 hrs/day) | ~180–220 units |
| Refrigerator (350L, 5-star) | ~35–45 units |
| Geyser (15L, 1 hour/day) | ~45–60 units |
| Lighting, fans, TV, misc. | ~60–100 units |
Total consumption range for a 3BHK in Hyderabad: 300–600 units/month
Your actual electricity bill from TSSPDCL/TSNPDCL is the most reliable indicator. Share your last 3 bills with us for an accurate system size recommendation.
Recommended System Size for a 3BHK
- 4kW — ideal for a 3BHK with 1 AC, LED lights, fans, and a refrigerator. Monthly consumption under 350 units.
- 5kW — suits a 3BHK with 1–2 inverter ACs, full appliance load. Monthly consumption 350–500 units.
- 6kW — recommended for 2 non-inverter ACs or heavy all-day usage. Monthly consumption 500–700 units.
Cost, Subsidy, and Payback Table
PM Surya Ghar subsidy is ₹30,000 for 1kW, ₹60,000 for 2kW, and ₹78,000 (maximum) for 3kW and above. Whether you install 4kW, 5kW, or 6kW, the subsidy remains fixed at ₹78,000. There is no additional state top-up in Telangana.
| Size | Gross Cost | PMSG Subsidy | Net Cost | Monthly Generation | Monthly Savings* | Payback |
|---|---|---|---|---|---|---|
| 4 kW | ₹2,80,000 | ₹78,000 | ₹2,02,000 | ~480 units | ~₹3,800 | 4–5 yrs |
| 5 kW | ₹3,50,000 | ₹78,000 | ₹2,72,000 | ~600 units | ~₹4,800 | 4–5 yrs |
| 6 kW | ₹4,20,000 | ₹78,000 | ₹3,42,000 | ~720 units | ~₹5,800 | 4–5 yrs |
*Savings calculated at blended TSSPDCL domestic tariff of ~₹8/unit including fixed charges. Actual savings depend on your slab and usage pattern.
Roof Space Required
| System Size | Number of Panels (500W) | Roof Area Required |
|---|---|---|
| 4 kW | 8 panels | ~270 sq ft (25 sq m) |
| 5 kW | 10 panels | ~330 sq ft (31 sq m) |
| 6 kW | 12 panels | ~400 sq ft (37 sq m) |
These figures assume shadow-free south-facing area on a flat terrace with walkway clearance. Obstructions like water tanks, AC outdoor units, and staircase covers reduce usable area.
PMSG Subsidy: What to Know for a 3BHK Installation
The PM Surya Ghar Muft Bijli Yojana (PMSG) subsidy structure for residential consumers:
- 1kW system: ₹30,000 subsidy
- 2kW system: ₹60,000 subsidy
- 3kW and above: ₹78,000 subsidy (maximum — does not increase further)
This means a 4kW, 5kW, and 6kW system all receive the same ₹78,000. The subsidy is disbursed by the central government directly to your bank account after installation, inspection by TSSPDCL, and file submission. Sri Ishaan Solar handles the entire subsidy application process. There is no additional state subsidy from Telangana state government — any installer claiming ₹1.38 lakh or more is misrepresenting the scheme.
Sri Ishaan Solar's 3BHK Site Survey Process
- Load analysis: We review your last 3 electricity bills and list of appliances to confirm the right system size.
- Roof assessment: Shadow analysis, structural check, azimuth measurement, and usable area calculation.
- Layout design: Panel placement, cable routing, inverter location, and earthing plan.
- Detailed quotation: Full specification — panel brand and model, inverter make, mounting structure type, and GSTIN-stamped invoice.
- PMSG subsidy application: We submit all documents on your behalf after installation.
Get an Accurate Quote for Your 3BHK
Share your last electricity bill and we'll recommend the exact system size, calculate your subsidy, and give you a net cost with payback projection — for free.
Get Free 3BHK Solar Quote on WhatsAppFrequently Asked Questions
Is 5kW enough for a 3BHK with 2 ACs in Hyderabad?
A 5kW system generates ~600 units/month. Two 1.5-ton inverter ACs running 7–8 hours/day consume ~280–320 units together. Add 150–200 units for other appliances and you are at 430–520 units/month. A 5kW system will cover this most months, but in peak summer (April–May) when ACs run longer, you may slightly exceed generation. For consistent full-coverage, 6kW is safer.
What size solar inverter should I get for a 3BHK?
Match the inverter rating to your system size: 4kW system with a 4–5kW inverter, 5kW system with a 5kW inverter, 6kW system with a 6kW inverter. If battery backup is planned for the future, opt for a hybrid inverter now and add batteries later.
Can I split panels across two different roofs in my house?
Yes — for example, 6 panels on the terrace and 6 panels on a south-facing sloped section. They must be wired into separate MPPT channels on a dual-MPPT inverter. Sri Ishaan Solar designs split-roof layouts during the site survey and selects the right inverter for this configuration.
What is the PMSG subsidy for a 4kW or 5kW system?
Both 4kW and 5kW systems qualify for the same ₹78,000 maximum PMSG subsidy. There is no increase in subsidy beyond 3kW. Telangana has no additional state top-up. Any claim of higher subsidy is incorrect.
How long does the entire installation process take for a 3BHK?
From site visit to commissioned system: 2–4 weeks. This includes system design (2–3 days), material procurement (5–7 days), installation (1–2 days), TSSPDCL net meter application and approval (1–3 weeks). We manage the entire process with minimal disruption to your household.