10 kW Solar System Generation: How Many Units per Day in Delhi NCR (2026)
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> **Quick Summary** > - **Daily generation:** 40–54 units (varies by season) > - **Annual generation:** ~15,000 units > - **Monthly bill offset (at ₹8/unit):** up to ₹12,000 > - **Roof area needed:** ~600 sq ft of unshaded south-facing space > - **Panels needed:** 17–18 panels of 580–620 Wp each
A 10 kW rooftop solar system is the typical sizing for a large villa, a 4-BHK independent floor with two A/Cs running through summer, or a small commercial premises in Delhi NCR. The question every serious buyer asks at quote time: **how many units will it actually generate in a day?**
This page answers that question with month-by-month numbers from Delhi NCR irradiance data, plus what the 10 kW size means for net metering, subsidy, and payback.
## Daily Generation by Season (Delhi NCR)
Using Delhi''s field-corrected per-kW yield (see our per-kW generation guide):
| Season | Per-kW Daily | 10 kW System Daily | Monthly (10 kW) | |---|---|---|---| | Peak summer (May) | 5.4 units | **54 units/day** | ~1,670 units | | Pre-monsoon (April) | 5.3 units | **53 units/day** | ~1,590 units | | Monsoon (Jul–Aug) | 4.0 units | **40 units/day** | ~1,240 units | | Post-monsoon (Oct) | 4.4 units | **44 units/day** | ~1,360 units | | Winter (Dec–Jan) | 3.0 units | **30 units/day** | ~930 units | | **Annual average** | **4.2 units** | **~42 units/day** | **~1,250 units** | | **Annual total** | — | — | **~15,000 units** |
A 10 kW system in Delhi NCR generates roughly **15,000 units per year**. That''s enough to cover the entire annual consumption of a household drawing 1,200 units/month on average, with the seasonal surplus banked via net metering.
## What 10 kW Actually Costs (Delhi NCR)
| City | Gross Cost (₹) | Subsidy | Net Cost (₹) | Per-kW | |---|---|---|---|---| | Delhi (BSES/TPDDL) | 5,50,000 | 78,000 + Delhi GBI | **4,72,000** | ₹47,200/kW | | Gurugram (DHBVN) | 5,50,000 | 78,000 only | **4,72,000** | ₹47,200/kW | | Faridabad (DHBVN) | 5,50,000 | 78,000 only | **4,72,000** | ₹47,200/kW | | Noida (PVVNL) | 5,50,000 | 1,08,000 | **4,42,000** | ₹44,200/kW |
The subsidy is **capped at 3 kW** — a 10 kW system still receives only the 3 kW subsidy amount. Anyone quoting you a "10 kW subsidy" north of ₹78,000 (or ₹1,08,000 in UP) is wrong.
For full city-by-city pricing breakdowns, see Delhi NCR pricing, Gurugram pricing, Faridabad pricing, and Noida pricing.
## Payback Math for a 10 kW System
At an average DHBVN/BSES upper-slab tariff of ₹8/unit:
- **Annual generation:** 15,000 units - **Annual savings:** ₹1,20,000 - **Net cost (DHBVN):** ₹4,72,000 - **Payback:** **3.9 years**
Noida''s lower net cost (₹4,42,000) pulls payback to **3.7 years**.
After payback you''re looking at 21+ years of ~₹1.2L/year electricity offset — a lifetime saving of ₹25L+ at today''s tariff (and substantially more as tariffs escalate at ~5%/year, which is the actual historical Delhi NCR trend).
## Roof Area and Panel Count
A 10 kW system at 600 Wp/panel needs 17 panels (16.7 → round up to 17). Each panel is roughly 2.4 m × 1.13 m ≈ 2.7 m². With walking space and tilt:
- **Minimum roof area:** ~600 sq ft of contiguous, unshaded, south-facing space - **Recommended:** 700–800 sq ft for service access and a future battery cabinet
Most independent floors in Delhi NCR Sectors 14–57 (Gurugram), Sectors 50–75 (Noida), Sectors 14–46 (Faridabad), and Dwarka/Vasant Kunj/Rohini blocks have the area on the top terrace. Apartment-block roofs can host 10 kW only as an RWA-level community installation — see our Dwarka RWA community solar guide.
For the 10 kW microinverter alternative (worth considering when you have multiple shading sources), read our 10 kWp Enphase IQ8 case study from a Gurgaon bungalow — real module-level yield data from a 2.5-year-old install.
## Net Metering for a 10 kW System
10 kW is the upper limit for residential net metering in most NCR utility territories without crossing into commercial-category billing:
- **BSES Rajdhani / BSES Yamuna (Delhi):** Up to 10 kW residential, quarterly settlement - **TPDDL (Delhi):** Up to 10 kW residential, annual settlement - **DHBVN (Gurugram, Faridabad):** Up to 10 kW residential, monthly netting - **PVVNL (Noida, Greater Noida):** Up to 10 kW residential
Crossing 10 kW often re-categorises you to commercial tariffs (₹10+/unit fixed charge, three-phase connection mandatory). For most homes, **10 kW is the sweet spot** — the largest you can install before the tariff math changes.
## FAQ
**How many units does a 10 kW solar system generate per day in Delhi?** 40–54 units depending on season. Peak summer (May) hits ~54 units/day; winter (December–January) drops to ~30 units/day; annual average is ~42 units/day.
**How many units in a year?** About 15,000 units annually for a properly-installed 10 kW system in Delhi NCR with quarterly cleaning.
**Is a 10 kW system overkill for a home?** For a 1,200+ units/month consumer (typical of large villas with 4+ A/Cs, EV charging, or pool pumps) it''s correctly sized. For a 600 units/month household, a 5 kW is the better number — see 3 kW vs 5 kW for Indian homes.
**Does the PM Surya Ghar subsidy increase for a 10 kW system?** No. Subsidy is capped at the 3 kW slab — ₹78,000 central, plus state top-up where applicable (Delhi ₹30,000; UP ₹30,000; Haryana ₹0). A 10 kW system gets the same subsidy as a 3 kW system.
**How much roof do I need for 10 kW?** About 600 sq ft of unshaded, south-facing roof minimum. 700–800 sq ft is more comfortable. See our solar on 1000 sq ft roof guide for a full sizing walkthrough.
**Can I run a 10 kW system on a single-phase connection?** Technically up to 7–8 kW; for 10 kW you''ll typically need a three-phase service connection from your utility. DHBVN, BSES, and PVVNL all require three-phase for residential 10 kW installations.
## Get a 10 kW Quote
Our installations engineer will measure your roof, check shading, verify your single-vs-three-phase connection, and give you a binding quote with month-by-month generation forecast. Free, no obligation, MNRE-empanelled — and we file the PM Surya Ghar paperwork ourselves.