1kW and 2kW Solar Systems: Price, Roof Space and Who They Suit

Most solar advice in India starts at 3kW, because that is where the subsidy tops out. But plenty of homes do not need 3kW. A couple in a 1BHK, a family whose bill rarely crosses ₹1,500, a house with a small terrace shared with two water tanks: for them, 1kW or 2kW is the honest size.

This guide answers the 1kW solar panel price in India question for 2026 in both ways people mean it: the cost of just the panels, and the cost of a complete system on your roof. We cover 2kW the same way, then look at subsidy, roof space, daily units, what each size runs, and the point where you should skip ahead to 3kW.

For prices across every size from 1kW to 10kW, see our solar panel price in India guide.

1kW solar panel price in India

There are two numbers here, and mixing them up is why online prices look so inconsistent.

Panels only. N-Type TOPCon panels sell for roughly ₹27 to ₹34 per watt in 2026. So 1kW worth of panels (1,000 watts) costs about ₹27,000 to ₹34,000. Mono PERC panels are a little cheaper per watt, but produce less from the same roof.

Complete on-grid system. A 1kW rooftop system, installed and connected to the grid, costs roughly ₹60,000 to ₹70,000 before subsidy.

Component	Indicative cost (1kW)
Solar panels (1kW to 1.2kW)	₹28,000 to ₹36,000
On-grid inverter (1kW)	₹12,000 to ₹16,000
Mounting structure	₹7,000 to ₹9,000
Cabling, earthing, protection	₹5,000 to ₹6,000
Installation and net metering	₹6,000 to ₹8,000
Total installed	₹60,000 to ₹70,000

Look at the per-kW cost: around ₹60,000 to ₹70,000, against roughly ₹60,000 to ₹69,000 per kW for a 5kW system. The site survey, net metering paperwork, earthing pits and crew visit cost almost the same whether you install one kilowatt or five. At 1kW, those fixed costs are spread over very little capacity.

2kW solar system price in India

A complete 2kW on-grid system costs roughly ₹1,20,000 to ₹1,40,000 before subsidy in 2026.

Component	Indicative cost (2kW)
Solar panels (about 1.9kW to 2.2kW)	₹55,000 to ₹70,000
On-grid inverter (2kW)	₹20,000 to ₹25,000
Mounting structure	₹12,000 to ₹15,000
Cabling, earthing, protection	₹8,000 to ₹10,000
Installation and net metering	₹10,000 to ₹14,000
Total installed	₹1,20,000 to ₹1,40,000

Roof type moves these numbers more than brand does. A flat RCC terrace needs a raised tilt structure, while a sloped tin roof can take a lighter rail system. Our solar panel installation cost breakdown explains what each line item should cost and where installers pad quotes.

Price after PM Surya Ghar subsidy

Residential systems qualify for the central subsidy under PM Surya Ghar Muft Bijli Yojana. At 1kW and 2kW, the subsidy is at its most generous per kilowatt: ₹30,000 for every kW up to 2kW.

	1kW	2kW
System cost before subsidy	₹60,000 to ₹70,000	₹1,20,000 to ₹1,40,000
Central subsidy	₹30,000	₹60,000
Net cost to you	₹30,000 to ₹40,000	₹60,000 to ₹80,000

That means the government covers close to half the cost at these sizes. The subsidy is credited to your bank account after the system is commissioned and inspected. You apply through the national portal at pmsuryaghar.gov.in and the installer must be a registered vendor. The panels must meet the Domestic Content Requirement (DCR): ALMM-listed modules made with Indian cells, which since 1 June 2026 means cells from ALMM List-II. Ask your installer for the DCR certificate before you sign. If you need finance, public sector banks offer collateral-free loans under the scheme, currently around 5.75% a year for systems up to 3kW. Some states add their own top-up on the central amount. Full eligibility rules are in our PM Surya Ghar Yojana subsidy guide.

How many units do 1kW and 2kW produce?

In most of India, one kilowatt of well-placed solar produces 4 to 5 units (kWh) a day as a yearly average.

Season	1kW daily	2kW daily	2kW monthly
Summer (March to May)	4.5 to 5 units	9 to 10 units	270 to 300 units
Winter (October to February)	4 to 4.5 units	8 to 9 units	240 to 270 units
Monsoon (June to September)	3 to 3.5 units	6 to 7 units	180 to 210 units

So a 1kW system makes roughly 120 to 150 units a month and a 2kW system roughly 240 to 300. Rajasthan and Gujarat sit at the top of these ranges. Kerala and the North East sit lower because of longer cloudy spells. We explain the monsoon dip in detail in do solar panels work at night and during monsoon.

To size quickly, open your last twelve electricity bills and average the units. If that number is around 120, 1kW fits. If it is 220 to 280, 2kW fits.

What can 1kW and 2kW run?

An on-grid system does not "run" appliances directly the way a generator does. It feeds your home, and the grid fills any gap. The useful question is how much of your consumption it offsets. Here are two realistic homes.

1kW home (about 4 to 5 units a day):

• 4 ceiling fans for 10 hours: about 2 units
• 8 LED lights for 6 hours: about 0.5 units
• Refrigerator (single door): about 1 unit
• TV, Wi-Fi router, phone and laptop charging: about 0.5 to 1 unit

2kW home (about 8 to 10 units a day): everything above for a slightly larger home, plus a washing machine, a water pump, a mixer, and about 3 to 4 hours of a 1 ton inverter AC.

A 1kW system can technically power a 1 ton AC while the sun is strong, because an inverter AC draws roughly 800 to 1,000 watts. But over a full day, one AC can eat 6 to 8 units on its own. If your summer bill climbs mainly because of AC use, you need 3kW, not 1kW.

Roof space and how many panels you need

The rule of thumb is about 100 square feet of shadow-free roof per kW. That allows for the panels plus the gaps you need for walking, cleaning and cable routing.

The panel count depends on panel wattage, and this is where modern panels change small systems:

System	With 540Wp panels	With 600Wp panels	With 635Wp panels
1kW	2 panels (1.08kWp)	2 panels (1.2kWp)	2 panels (1.27kWp)
2kW	4 panels (2.16kWp)	3 to 4 panels (1.8 to 2.4kWp)	3 panels (1.9kWp)

Atal Solar's M10R 144 Series panel is rated up to 600Wp and measures 2,278 x 1,134 mm, about 27.8 sq ft each. The G12R 132 Series reaches 635Wp at 2,384 x 1,134 mm, about 29 sq ft. Both are N-Type TOPCon, dual-glass and bifacial. Our G12R vs M10R guide explains the difference.

Two practical points apply to small roofs:

• These are large panels. Each one is about 2.3 metres long and weighs 33 to 34 kg. Your roof needs one clear run of at least 2.5 metres, and the panels need to get up your staircase. On a tight city terrace, check this before you finalise the quote.
• Fewer panels mean less hardware. Three 635Wp panels need fewer clamps, fewer connectors and less rail than four 500Wp panels. At 2kW that saving is small, but it is real.

Who 1kW and 2kW actually suit

1kW suits:

• Couples, single people and small 1BHK households using about 100 to 150 units a month
• Homes with a monthly bill of roughly ₹700 to ₹1,200
• Small or shared roofs where only 80 to 120 sq ft is free of shade
• Anyone who wants to start small and learn how net metering works

2kW suits:

• 2BHK families using about 200 to 300 units a month, with fans, a fridge, a washing machine and occasional AC
• Monthly bills of roughly ₹1,500 to ₹2,500
• Terraces with 180 to 250 sq ft of clear space

Neither suits:

• Homes where AC is the main load in summer
• Anyone planning to add an EV charger within the next few years

When 3kW makes more sense

The subsidy curve has one quirk worth understanding. You get ₹30,000 per kW for the first two kilowatts, but only ₹18,000 for the third. After that the subsidy stops growing at ₹78,000.

	2kW	3kW
Cost before subsidy	₹1,20,000 to ₹1,40,000	₹1,80,000 to ₹2,10,000
Subsidy	₹60,000	₹78,000
Net cost	₹60,000 to ₹80,000	₹1,02,000 to ₹1,32,000
Daily units	8 to 10	12 to 15

Going from 2kW to 3kW costs about ₹42,000 to ₹52,000 more after subsidy for 4 to 5 extra units a day. That is a good deal if you will use those units. It is a poor one if you export them to the grid at a low rate. Check your consumption, not the subsidy table. Our 3kW solar system price guide covers that size in detail.

Payback at 1kW and 2kW

Payback depends on what you pay per unit today. At a typical residential rate of ₹6 to ₹8 per unit:

• 1kW: 120 to 150 units a month saves about ₹800 to ₹1,100. Net cost ₹30,000 to ₹40,000. Payback is roughly 3 to 4 years.
• 2kW: 240 to 300 units a month saves about ₹1,600 to ₹2,300. Net cost ₹60,000 to ₹80,000. Payback is roughly 3 to 4 years.

After that, the system keeps producing for decades. Atal's TOPCon modules carry a 30-year power output warranty, which guarantees at least 87.4% of rated output at the end of year 30. Our solar panel warranty guide explains how to read these warranties.

Common mistakes at small sizes

1. Buying a panel-only "1kW kit" online and expecting subsidy. Subsidy needs a registered vendor, DCR modules with Indian-made cells and a net meter. A box of panels delivered to your door qualifies for none of that.

2. Undersizing the inverter when you plan to expand. If you might go to 2kW or 3kW later, ask whether a slightly larger inverter now saves you a second one later. Adding capacity also means a fresh net metering application.

3. Ignoring shade from water tanks and parapets. A shadow over one panel in a two-panel system cuts a big share of your output. Half-cut cell panels handle partial shade better, but a clear spot still beats good engineering.

4. Adding a battery by default. A battery adds roughly ₹25,000 to ₹60,000 at this size, gets no subsidy and needs replacing every 7 to 10 years. Choose one only if you face long daily power cuts.

Final word on 1kW and 2kW

In 2026, a complete 1kW system costs ₹60,000 to ₹70,000 and a 2kW system ₹1,20,000 to ₹1,40,000, before subsidy. After the ₹30,000-per-kW subsidy, you pay roughly half. That makes these the cheapest way into rooftop solar, with payback in 3 to 4 years.

The right choice depends on your units, not the price tag. Average twelve months of bills. Around 120 units a month points to 1kW. Around 250 points to 2kW. If AC drives your summer bill, go to 3kW.

Whatever size you choose, pick panels that make the most of limited roof space. High-efficiency N-Type TOPCon modules deliver more units from the same few square metres. Try our solar calculator to size a system from your bill, or talk to the Atal Solar team about panels for your roof.

Frequently asked questions

What is the 1kW solar panel price in India in 2026?

1kW worth of N-Type TOPCon panels costs roughly ₹27,000 to ₹34,000. A complete 1kW on-grid system, with inverter, structure, wiring, installation and net metering, costs about ₹60,000 to ₹70,000 before subsidy. After the ₹30,000 PM Surya Ghar subsidy, a residential buyer pays about ₹30,000 to ₹40,000.

What is the 2kW solar system price in India with subsidy?

A 2kW on-grid system costs about ₹1,20,000 to ₹1,40,000 installed. The central subsidy for 2kW is ₹60,000, so the net cost comes to about ₹60,000 to ₹80,000. The modules must be DCR-certified (made with Indian cells) to qualify. Some states add a top-up on the central amount, which lowers it further.

How many solar panels are needed for 1kW?

With modern 540Wp to 635Wp panels, a 1kW system needs just two panels. Two 600Wp panels give 1.2kWp, a little extra capacity that helps offset heat and dust losses. Older 330Wp panels would need three or four for the same capacity.

How much roof space does a 2kW solar system need?

Plan for about 180 to 250 square feet of shadow-free roof. Three or four large-format panels take up about 85 to 115 sq ft on their own. The rest is spacing for cleaning, walking and cable routes.

Can a 1kW solar system run an AC?

It can power a 1 ton inverter AC for a few sunny hours, but not all day. A 1kW system makes 4 to 5 units daily, while one AC can use 6 to 8 units a day in summer. If AC is your main load, a 3kW system is the realistic choice.

How many units does a 1kW solar system generate per month?

About 120 to 150 units, based on 4 to 5 units a day. Output is higher in summer, lower during monsoon, and higher in sunny states like Rajasthan and Gujarat.

Is 1kW solar worth it?

It is worth it if you use around 100 to 150 units a month. With subsidy, a 1kW system pays for itself in about 3 to 4 years and keeps producing for decades. If you use more, a 2kW or 3kW system gives better value per rupee, because the fixed installation costs are spread over more capacity.

Can I expand a 1kW system to 2kW or 3kW later?

Yes, but plan for it. You may need a bigger inverter, extra structure, and a fresh net metering approval from your DISCOM. If expansion is likely within two or three years, installing 2kW or 3kW now usually works out cheaper.