How long does a 500 kW solar plant take to build?

Typical end-to-end: 60–90 days from signed PO. That includes detailed design, structural audit, equipment procurement, civil works, installation, commissioning, and DISCOM net-metering approval. We file the DISCOM application in parallel with civil works, not after — that's the biggest schedule-saver at this size.

What roof area do I actually need for 500 kW?

Around 50,000 sqft of shadow-free roof at standard mounting. If the roof is short, we extend with elevated structures over parking or driveways — adds shade for vehicles, doubles up the asset, and at 500 kW the incremental steel cost is usually 4–7% of project cost.

How long does a DISCOM net-metering approval actually take for a 500 kW plant in Delhi NCR?

For sub-MW rooftop plants: BSES (BRPL and BYPL in Delhi) typically 21–45 days from single-window portal submission; DHBVN (Gurgaon, Faridabad) 30–60 days depending on inspection load; UPPCL (Noida, Ghaziabad) is the slowest at 45–75 days because of the physical panel test at the sub-station. Filing during civil works — not after commissioning — keeps the meter arrival within a week of energisation.

Is a 500 kW plant worth doing under OPEX/PPA for an RWA, school or hospital trust?

For sub-MW installs on trust or RWA books, OPEX is often the cleanest path: no board resolution required for capex, no depreciation to unlock (trusts and RWAs don't pay corporate tax), and the 15-year fixed Rs. 4–5/unit tariff beats DISCOM slabs of Rs. 8–10/unit at this range. Downside: you don't own the plant. For a factory or hotel with taxable profits, the AD-driven CAPEX IRR usually wins instead.

What does a PSU bank term loan look like at 500 kW?

For projects between Rs. 80L and Rs. 3Cr, SBI's Surya Shakti Solar scheme and BoB's Baroda Solar Loan both fund up to 75% under the PSL renewable category. Typical structure: 10-year reducing-balance term at 9.5–10.5%, 6-month moratorium during commissioning, collateral is the plant itself plus a personal guarantee. Sanction takes 4–8 weeks with a full DPR. We share the DPR template.

Do I need HT (high-tension) metering at 500 kW, or does LT still work?

Depends on your existing sanctioned load. If your DISCOM connection is already HT (11 kV or above), the solar plant ties in at HT with a step-up transformer — that's the norm above 300 kW connected. If you're on LT (415 V) with sanctioned load under 150 kW, connecting a 500 kW plant forces a full HT conversion for the site, which adds Rs. 15–25L in transformer, panel and metering costs. We audit the DISCOM sanction letter before scoping.

Can 500 kW fit on a typical logistics warehouse roof, or do we need elevated structures?

A 500 kW plant needs roughly 50,000 sqft of shadow-free area. A single-shed logistics warehouse of 60,000+ sqft usually accommodates it entirely on roof. Multi-shed campuses often distribute it across 2–3 sheds with a common inverter room. Elevated parking-shed structures (over truck loading bays) add capacity when roof is short — cost premium is 8–12% versus rooftop but shade earns operational goodwill.

Commercial & Industrial · 500 kW

500 kW Solar Plant Cost in India — 2026 Full Breakdown

No brochure ranges. Live ₹/Wp from our facts registry, a working calculator, and CAPEX vs OPEX math you can stress-test before talking to anyone.

Verified 21 May 2026 · Bridgeway internal C&I project records, 2025–2026

500 kW commercial rooftop solar plant — industrial shed in Delhi NCR

500 kW Solar Plant — At a Glance

Honest ballpark figures for a 500 kW commercial rooftop in India. Final price moves with site, roof type, and grid evacuation distance.

Verified 21 May 2026 · Bridgeway internal C&I project records, 2025–2026

Indicative CAPEX

Rs. 1.90 Cr

Rs. 38/Wp turnkey, all BoS included

Annual generation

750 MWh

North India, shadow-free roof

Roof needed

50,000 sqft

Shadow-free, RCC or sheet metal

Payback

3.5–4.5 yrs

At C&I tariff Rs. 8–10/unit

Suitable for

Large hospitalsUniversity campusesIndustrial shedsLogistics parks

500 kW Calculator

Your Numbers, Not a Brochure

Move the sliders. Switch between CAPEX and OPEX. Every number below is sourced live from our facts registry.

Verified 21 May 2026 · Bridgeway internal C&I project records, 2025–2026

Plant capacity

500 kW

Roof area available

50,000 sqft

Enough roof for 500 kW

Current monthly electricity bill

Rs. 40,00,000

Implied tariff: Rs. 12.0/unit

How are you paying?

Indicative project cost

Rs. 1.90 Cr

at Rs. 38/Wp · turnkey, no hidden BoS

Generation

60,000 units/mo

720 MWh/yr

Monthly bill saving

Rs. 7,20,000

Annual: Rs. 86.4 L

Payback

2.2 yrs

25-yr plant life · 22+ yrs of free power after

CAPEX vs OPEX/PPA — Which Fits You?

The honest answer: it depends on your tax position and your appetite for capex. We do both. Here's the side-by-side.

Verified 21 May 2026 · Bridgeway PPA contracts FY25-26

For sub-MW projects, the split usually falls along tax status.

At Rs. 80L–2Cr project size the decision is almost mechanical: taxable factory or hotel? CAPEX with accelerated depreciation moves the IRR by 4–6 percentage points. Trust, RWA, school or hospital society? OPEX/PPA sidesteps the board-resolution problem and the depreciation you can't unlock anyway. Bank financing at this size is straightforward PSU term loan under PSL renewable — 75% funding, 10-year reducing balance.

CAPEX (you buy)

OPEX / PPA (we own)

Upfront cost

Full CAPEX

Zero — we fund it

Ownership

You own the plant from day one

We own it; transfers after 15 yrs

Effective tariff

~Rs. 2.7–3.6/unit (LCOE)

Fixed Rs. 4–5/unit, 15-yr PPA

Balance-sheet impact

Capitalised asset, depreciation benefit

OPEX line, no debt loaded

Accelerated depreciation (40%)

Best when

Profitable business that wants the IRR

Trust, school, hospital — no capex appetite

From PO to Energised — 60 to 90 days

Four phases. Two of them run in parallel. We never quote "30 days" — that's a sales-call number, not an EPC number.

Site Audit + Engineering

5–7 days

Structural survey, shading analysis, load profile from your last 12 bills, single-line diagram, and DPR sign-off.

Financing + DISCOM Filing

2–3 weeks

Bank/NBFC DPR or PPA paperwork in parallel with net-metering application to your DISCOM. We run both tracks.

Build + Installation

4–8 weeks

Procurement, civil/structural, module mounting, string wiring, inverters, ACDB/DCDB, earthing, SCADA.

Commissioning + Net Meter

2–4 weeks

DISCOM inspector visit, bi-directional meter swap, plant energisation, performance ratio sign-off.

What Actually Breaks at 500 kW

500 kW is the size where a few structural and metering decisions determine whether the plant lands on budget or overshoots by 15%.

HT vs LT metering threshold

If your DISCOM sanction is LT (415 V) with load under 150 kW, connecting 500 kW forces an HT conversion — Rs. 15–25L in transformer, panel and metering. Existing HT sites tie in with a step-up transformer at rooftop-inverter output. We audit the sanction letter before quoting.

Elevated parking-shed economics

500 kW needs ~50,000 sqft of shadow-free roof. Warehouses at 60,000+ sqft fit rooftop entirely; multi-shed campuses often split it. Elevated structures over truck loading bays add capacity at 8–12% premium — shade earns operational goodwill and doubles the asset.

Roof anchoring: RCC vs metal shed

RCC roof: chemical anchors with epoxy grout, waterproof caps at every penetration — leak risk is real if the roofer skips the flashing. Metal shed: seam clamps for standing-seam profiles, self-drilling screws only on trapezoidal with butyl washers. We spec by roof type; the same mounting kit does not work for both.

Financing a 500 kW Plant

Most C&I customers don't pay full capex up front. Three routes — bank term loan, NBFC, or OPEX/PPA. We help with the DPR for all three; we don't push a particular lender.

See All Financing Options