Can I expand a 3kW solar system to 5kW later?

Yes, but with planning. If you install a 3kW on-grid system now, expanding to 5kW later requires either a new inverter (if the current one is 3kW rated) or replacing it with a 5kW model. Panels can be added. However, the PM Surya Ghar subsidy caps at ₹78,000 for 3kW and above — so a future expansion to 5kW will not attract additional subsidy. It is more cost-effective to install 5kW upfront if your long-term consumption warrants it. If you are unsure, we recommend installing a 5kW inverter with 3kW of panels initially — this way panels can be added without replacing hardware.

Does a 3kW solar system work in an apartment in Hyderabad?

In most cases, no. Apartments share roof space among all flats, and TSSPDCL guidelines for PM Surya Ghar require each unit to have a dedicated, unshaded roof area. A 3kW system needs approximately 200–220 sq ft of unobstructed south- or west-facing roof. In a typical apartment building, individual flat owners do not have exclusive roof rights. The exception is ground-floor independent units with terrace rights, or RWA (Residents' Welfare Association) collective installations for common area power. If you live in an independent house or villa, 3kW works well. For apartments, speak with us about what is feasible at your specific property.

Is 3kW enough to run an AC in Hyderabad?

A 3kW system can partially offset the cost of running one 1.5-ton AC, but cannot exclusively power it throughout the day. A 1.5-ton 5-star inverter AC draws approximately 1.0–1.4 kW of power. During peak solar hours (10 AM–3 PM), your 3kW system generates 2.5–3 kW, which comfortably covers the AC plus other household loads. However, the AC running in evenings or nights draws from the grid as normal. For households with one 1.5-ton AC plus normal household appliances (fans, lights, refrigerator, TV), 3kW is a solid fit. For two ACs or a 2-ton unit, consider 5kW.

What is the PMSG subsidy for a 3kW solar system in Hyderabad?

The PM Surya Ghar Muft Bijli Yojana (PMSG) subsidy for a 3kW residential solar system is ₹78,000. This is the maximum slab — any system from 3kW to 10kW receives the same ₹78,000 subsidy. The subsidy is disbursed directly to your bank account after successful DISCOM inspection and net meter installation. There is no Telangana state top-up subsidy; the ₹78,000 is the total subsidy available. The subsidy applies only to on-grid and hybrid systems, not off-grid installations.

How many units per day does a 3kW solar system generate in Hyderabad?

A 3kW solar system in Hyderabad generates approximately 10–14 units (kWh) per day on a clear sunny day. The monthly average is around 360 units (120 units per kW per month), giving an annual generation of approximately 4,320 units. Generation is higher in summer months (April–June) at 12–14 units/day and lower during monsoon (July–September) at 7–9 units/day due to cloud cover. The annual average is reliable enough that savings projections over 12 months are accurate even accounting for the monsoon dip.

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3kW Solar System in Hyderabad — Price, Savings & Subsidy Guide 2026

Gross cost ₹2,10,000, net ₹1,32,000 after ₹78,000 PMSG subsidy. Who should install 3kW?

Updated May 2026 | By Sri Ishaan Solar Team

The 3kW solar system is the most popular residential solar size in Hyderabad for one good reason: it hits the PMSG subsidy maximum of ₹78,000 while staying affordable enough for a 2–3 BHK independent house with a monthly bill between ₹2,500 and ₹4,000. This guide gives you every number you need to decide whether 3kW is the right size for your home.

3kW Solar System — Quick Facts (Hyderabad, 2026)

Parameter	Value
Gross system cost (before subsidy)	₹2,10,000
PMSG subsidy (PM Surya Ghar)	₹78,000
Net cost to consumer	₹1,32,000
Monthly generation (average)	~360 units
Monthly savings (TSSPDCL domestic tariff)	₹2,400 – ₹3,200
Payback period	4 – 5 years
Roof area required	~200 – 220 sq ft
Number of panels (540W each)	6 panels
Panel warranty	25 years performance
25-year generation savings	₹6,00,000 – ₹9,00,000+

Who Should Install a 3kW Solar System?

A 3kW system is the right fit if your home meets most of these criteria:

Monthly electricity bill: ₹2,500 – ₹4,000 (consuming 200–350 units/month on TSSPDCL domestic tariff)
House type: 2–3 BHK independent house, row house, or villa with dedicated roof access
Daily load: 8–12 units/day — typical for a family with 1 AC (1.5-ton), refrigerator, 3–4 fans, LED lights, TV, washing machine
Roof area available: At least 200 sq ft of unshaded south- or west-facing surface
Primary goal: Reduce or eliminate the electricity bill, claim full PMSG subsidy

If your bill is regularly above ₹5,000/month, you are likely consuming 400+ units and should consider a 5kW system instead. A 3kW system will reduce but not eliminate a large bill.

Detailed Cost Breakdown — 3kW On-Grid System, Hyderabad

Component	Approximate Cost
Solar panels (6 × 540W mono PERC / TopCon)	₹65,000 – ₹78,000
On-grid inverter (3kW, Solis / Growatt / Goodwe)	₹22,000 – ₹30,000
GI / aluminium mounting structure	₹15,000 – ₹20,000
DC/AC wiring, junction boxes, fuses, earthing	₹8,000 – ₹12,000
DISCOM application + net meter charges (TSSPDCL)	₹5,000 – ₹8,000
Installation labour	₹8,000 – ₹12,000
Total package price (Sri Ishaan Solar)	₹2,10,000
Less: PMSG subsidy	−₹78,000
Net out-of-pocket cost	₹1,32,000

Package price includes Tier-1 panels (Waaree/Adani/Tata), on-grid inverter, mounting structure, wiring, earthing, DISCOM net-metering application, installation, commissioning, and 5-year workmanship warranty. Final price confirmed at free site survey.

PMSG Subsidy for 3kW — What You Need to Know

The PM Surya Ghar Muft Bijli Yojana (PMSG) subsidy structure for residential systems is:

1kW system: ₹30,000
2kW system: ₹60,000
3kW and above: ₹78,000 (maximum slab — does not increase beyond this)

This means installing 3kW gives you the same subsidy as installing 5kW or 10kW. It is the optimal size to claim the full benefit while keeping your net cost as low as possible.

How the subsidy is paid: The subsidy is not a discount at the time of purchase. Sri Ishaan Solar installs your system, applies to the PM Surya Ghar portal on your behalf, TSSPDCL inspects the installation and installs the net meter, and the Central Government disburses ₹78,000 directly to your linked bank account — typically within 30–60 days of net meter installation.

Important: There is no Telangana state top-up subsidy. Some installers quote a combined figure of ₹1.38L — this is incorrect. The only subsidy for 3kW+ systems in Telangana is ₹78,000 from the Central Government's PMSG scheme. Verify any higher figures with TSSPDCL before signing.

Expected Savings — 3kW in Hyderabad

A 3kW system generates approximately 360 units per month on average across the year (120 units per kW per month, based on Hyderabad's solar irradiance of ~5.5 peak sun hours/day).

At TSSPDCL domestic slab tariffs (₹6–₹9/unit depending on your consumption bracket), the monthly savings work out to:

Tariff Assumption	Monthly Saving	Annual Saving
₹6.60/unit (lower slab, 200–300 units)	~₹2,376	~₹28,500
₹7.50/unit (mid slab, 300–500 units)	~₹2,700	~₹32,400
₹8.50/unit (upper slab, 500+ units)	~₹3,060	~₹36,720

At these savings rates, payback on a net cost of ₹1,32,000 is 4–5 years. With a 25-year panel warranty, you accumulate 20+ years of free electricity after payback.

Roof Space: What You Need for a 3kW System

A 3kW system uses 6 panels of 540W each. Each panel is approximately 2.1m × 1.05m (22 sq ft). Accounting for spacing between rows and walkway clearance, the total roof area needed is 200–220 sq ft of usable, unshaded surface.

Key requirements for the roof:

Unshaded from 9 AM to 4 PM — trees, water tanks, and neighbouring buildings are common obstacles in Hyderabad
South- or west-facing preferred (east-facing also works with slightly lower output)
RCC/concrete terrace preferred; tile roofs require additional clamping hardware
Roof age: panels last 25 years — if your roof needs repair in 5 years, plan accordingly

3kW vs 5kW — When Should You Upsize?

Factor	Choose 3kW	Choose 5kW
Monthly bill	₹2,500 – ₹4,000	₹4,000+
Daily consumption	8–12 units	12–20 units
AC units	1 × 1.5-ton	2 × 1.5-ton or 2-ton
Available roof	200–250 sq ft	300–350 sq ft
Net cost (after subsidy)	₹1,32,000	₹2,72,000
Subsidy available	₹78,000	₹78,000 (same)
Monthly savings	₹2,400 – ₹3,200	₹3,500 – ₹5,000

Bottom line: Since the subsidy cap is ₹78,000 for both 3kW and 5kW, there is no subsidy incentive to stay at 3kW if your consumption warrants 5kW. The incremental cost to go from 3kW to 5kW (net of subsidy) is approximately ₹1,40,000 (₹2,72,000 minus ₹1,32,000), and the additional savings of ₹1,000–₹1,800/month pay that back in 4–5 additional years.

Get a Free 3kW Solar Quote for Your Home

Sri Ishaan Solar has been installing solar in Hyderabad since 2017 — over 100 installations, 500+ kW. We handle the PMSG application, TSSPDCL net metering, and subsidy disbursement end-to-end. TGREDCO registered (TSRE260936).

Get your 3kW solar quote in 24 hours

We'll assess your roof, check shading, and give you a firm quote with subsidy timeline — no obligation.

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Disclaimer: System costs, payback periods, and subsidy figures in this guide are indicative estimates for Hyderabad as of May 2026, based on current market pricing, TSSPDCL domestic tariffs, and PM Surya Ghar subsidy rates in effect. Actual costs vary by panel brand, inverter selection, and site conditions. Always obtain a site-specific quote before purchase.