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The most common sizing question, answered with numbers.
Image: Solar panels on housing in the Netherlands (9198) by Eneco Group, CC BY 2.0, via Wikimedia Commons.
For most homes the real choice is between 3 kW and 5 kW. This guide to solar in Raipur compares cost, savings and subsidy.
Quick answer: choose 3 kW if you use about 350 to 400 units a month; choose 5 kW only if your use is near 600 or you plan to add AC or an EV.
| Item | 3 kW | 5 kW |
|---|---|---|
| Monthly output | 360 - 400 units | 600 - 670 units |
| Price (approx.) | Rs 1.65 - 1.90 lakh | Rs 2.6 - 3.0 lakh |
| Central subsidy | Rs 78,000 | Rs 78,000 |
| Net cost | About Rs 1.0 lakh | About Rs 1.9 - 2.2 lakh |
| Roof area | 30 - 35 sq m | 50 sq m |
| Payback | 3 - 4 years | 3.5 - 5 years |
If you expect to add loads, ask for an inverter and wiring that allow expansion. Keep the sanctioned load in mind. See solar for villa and bungalow.
Read how many panels a 3BHK needs.
Moving from 3 kW to 5 kW adds roughly Rs 90,000 to Rs 1.1 lakh before subsidy, and because the central subsidy does not increase, the whole extra is unsubsidised. The extra 2 kW generates around 240 units a month. At an assumed Rs 6.5 to 8 per unit, that is Rs 1,500 to 1,900 a month, or about Rs 18,000 to 23,000 a year, giving a simple payback on the increment of roughly five years. Whether that is attractive depends on your alternatives.
| Item | Illustrative value |
|---|---|
| Extra capital for +2 kW | Rs 90,000 - 1.1 lakh |
| Extra units a month | About 240 |
| Extra annual saving | Rs 18,000 - 23,000 |
| Payback on the increment | About 4 - 6 years |
Match size to units, not ambition. For a method to compare providers, see how to build your own list of the top 10 solar companies in Raipur. For the basics of solar in Raipur, read our cost and savings guide, and use the solar Raipur locality guide for your area. Our page on PM Surya Ghar Yojna in Raipur lists the slabs, and the solar subsidy in Raipur service handles the paperwork. A trusted solar company in Raipur should survey your roof; use the checklist for the best solar company in Raipur to compare, and ask about solar installation in Raipur. More articles are on the solar blog.
Choose by your units: 3 kW suits about 350 to 400 units a month and 5 kW about 600.
No, the central subsidy is capped at Rs 78,000 for 3 kW and above.
Payback is slightly slower above 3 kW because the subsidy share is smaller, but monthly savings are bigger.
Roughly 50 square metres.
Sometimes; plan inverter and wiring for it.
Visit C-29, Sector 3, Devendra Nagar, Raipur, Chhattisgarh 492001, call 083051 31420 or send your details online for a free survey and a written quotation, with the subsidy worked out. Our solar installation in Raipur team replies the same working day.
Next, talk to a solar company in Raipur about solar installation in Raipur. Our solar in Raipur guide explains costs, the solar Raipur guide covers your area and the best solar company in Raipur checklist helps you choose. Want help with solar subsidy in Raipur or PM Surya Ghar Yojna in Raipur? Our team handles the whole file. Quick links: best solar in Raipur, best solar company in Chhattisgarh, solar for home in Raipur, PM Surya Ghar Yojana in Raipur and solar pump in Raipur. Browse every article on the solar blog, or see our solar services.