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EMERGEDPower Distribution

For factories, malls, warehouses, hospitals & campuses

On-grid Solar

The cheapest unit you will ever buy is the one your own roof makes.

Grid-tied rooftop solar with net-metering. No batteries to buy, no fuel to burn: solar carries your daytime load, the meter runs backwards with the surplus, and the grid stays as your night-time supply.

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2.4 MWp net-metered · Narayanganj

Typical size
50 kWp – 5 MWp
Bill reduction
25 – 45%
Payback
3.5 – 5 yrs
Generation warranty
25 yrs

Who it's for

The default choice for a roof on a working feeder.

If your machines run while the sun is up and your utility supply is reasonably stable, net-metered solar is the shortest route to a lower cost per unit — no batteries, no fuel, no moving parts above the inverter.

Losing production to load-shedding? Add storage and the same array becomes a hybrid plant.

Compare Hybrid

  • Your load runs while the sun does

    Single or double day shift, so most of what you generate is consumed on site at the tariff you already pay.

    Daytime load > 60%

  • The grid bill is a board-level number

    Plants paying lakhs a month on DESCO, DPDC, REB, PBS or NESCO industrial and commercial tariffs.

    Bill > Tk 3 lakh / month

  • You have shade-free roof doing nothing

    Sheds, warehouses, car parks and campus blocks with 5,000 sq ft or more of usable roof.

    ≥ 5,000 sq ft

  • Buyers ask for renewable share

    Net-metering gives you metered, utility-verified export and import data for Scope 2 and buyer audits.

    Sustainability audit due

How it works

Solar serves the load first. Only the surplus goes to the meter.

Every unit you consume on site is worth your full tariff, so we size around your own load curve before we count on export.

  1. Solar arrayRooftop · Tier-1 modules
    DC
  2. String inverters98%+ efficiency
    AC
  3. AC combiner & MDBProtection + metering
    Load first
  4. Bi-directional meterImport / export
    Export
  5. Plant loadsMachines, HVAC, lighting
  6. Utility gridDESCO · DPDC · REB · PBS
Daytime: array → inverters → plant load, with surplus exported through the bi-directional meter.Solar DC/ACTo your loadGrid exchange

Day

Solar covers the load; anything left over is exported and credited.

Night

The grid supplies you as it always did — you pay only net units.

Outage

The inverter disconnects within 2 seconds, as anti-islanding rules require.

Net-metering

Net-metering in Bangladesh

Under the SREDA Net Metering Guideline, grid-connected rooftop systems can export surplus to DESCO, DPDC, REB/PBS and other distribution utilities, with exported units netted against imports on your bill. System capacity is generally capped at 70% of sanctioned load. We prepare the application, single-line diagram and metering paperwork.

  1. 01

    Step 01 · Week 1

    Feasibility & sanctioned load check

    We confirm your sanctioned load, tariff category and the 70% capacity cap before sizing anything.

  2. 02

    Step 02 · Week 2–3

    Application to the utility

    Net-metering application with single-line diagram, layout and equipment datasheets, filed on your behalf.

  3. 03

    Step 03 · Week 4–8

    Technical review & agreement

    Utility review, site inspection and the net-metering agreement signed with the distribution company.

  4. 04

    Step 04 · Week 6–12

    Installation & commissioning

    Structure, modules, inverters and protection installed, then tested against IEC and utility requirements.

  5. 05

    Step 05 · Week 12–14

    Bi-directional meter & energisation

    The utility replaces your meter, the plant is energised, and export starts netting against import.

Specification

What we actually install.

Tier-1 equipment, IEC-tested protection and a grid interface your utility will sign off.

On-grid generation and conversion specification
Generation
ModulesN-type TOPCon / back-contact, 550–660 Wp, Tier-1
Module warranty12–25 yr product · 30 yr linear performance
Specific yield1,250–1,400 kWh/kWp/yr (site dependent)
Performance ratio78–84% after losses
MountingAluminium 6005-T5 rail, SS304 fixings, 40 m/s wind design
Conversion & protection
InvertersThree-phase string, 50–110 kW, 98.6%+ peak efficiency
Anti-islandingIEC 62116 — disconnects within 2 s of grid loss
ProtectionType II SPD on DC and AC, AFCI, earth-fault monitoring
MeteringUtility bi-directional meter + our own string-level monitoring
EarthingDedicated array and equipment earth to IEC 62305
Grid interface specification
Grid interface
ConnectionLT or HT, three-phase, at the main distribution board
Export controlNet-metering, or zero-export relay where export is not permitted
Capacity capUp to 70% of sanctioned load under the SREDA guideline
SettlementExported units netted against imported units on the monthly bill

Economics

Where the money comes from

No battery means the lowest capex per kWp of any rooftop route — and with most units consumed on site, every kilowatt-hour offsets the tariff you pay today.

Indicative for a 500 kWp net-metered system on an industrial tariff. Your assessment models your own bill, load curve and roof.

Estimate your own numbers
Indicative economics for a 500 kWp net-metered system
System size500 kWp
Annual generation≈ 650,000 kWh
Self-consumed by the plant≈ 85%
Indicative capexTk 2.75 crore
Annual saving≈ Tk 78 lakh
Simple payback3.5 years
25-year net saving≈ Tk 16 crore

Savings estimator

Three inputs, thirty seconds.

A first sizing from your bill and roof area. The site assessment replaces it with measured numbers.

Solar savings estimator

3 inputs · 30 seconds
Tk/ month

From your DESCO / DPDC / REB / PBS bill

sq ft

Shade-free roof, excluding skylights and plant

Connection type

Your indicative system

Recommended system size

—

Based on bill and roof area

Monthly savings

—

Payback period

—

Enter your bill and roof area to see a system size, monthly savings and payback. Nothing is sent until you ask for a proposal.
How we estimate

Tk 12/kWh grid tariff (Tk 30/kWh diesel for off-grid), 1,300 kWh/kWp/yr yield, 90 sq ft per kWp, 70% daytime load. Indicative only — not a quotation.

Narayanganj · November 2024

Case study · On-grid

2.4 MWp net-metered array across a denim mill

Result
3.9 yrs
simple payback
Sector
RMG & Textiles
Client
Denim mill

The challengeA buyer-mandated renewable target for 2026 and a roof shared by four separate buildings with different pitches.

The result3.1 GWh a year of clean generation, documented for buyer sustainability audits, with payback tracking at 3.9 years.

Read the full case study

FAQ

Net-metering questions we answer weekly

Capacity caps, outages, paperwork and what happens to surplus units.

Ask an engineer

Your meter records both directions: solar you don't use is exported to the utility and credited against the units you import at night, so you only pay the difference.

Under the SREDA Net Metering Guideline, systems are generally capped at 70% of your sanctioned load. We check your sanctioned load and tariff category in week one, and size within the cap.

No. A pure on-grid system must disconnect within two seconds when the grid drops — that is the anti-islanding rule that protects line workers. If you need ride-through, add storage and it becomes a hybrid system.

We do: application, single-line diagram, layout drawings, equipment datasheets, the inspection and the net-metering agreement with DESCO, DPDC, REB, PBS or NESCO.

It is exported and netted on your bill. Because unused credit is settled on the utility's terms, we size around your own consumption first — self-consumption is always worth more than export.

Yes, and many plants do. We specify a hybrid-ready inverter and leave space and cable routes in the electrical room, so storage is an upgrade rather than a rebuild.

Nothing, if it is surveyed first. We check purlin capacity, sheet gauge, corrosion and remaining roof life against BNBC 2020 before design, and use non-penetrating clamps wherever the sheet profile allows.

Free · no obligation

Your roof is already a power plant. Let's prove it.

A free site assessment gives you a sized system, a savings forecast and a payback period — in writing, within 10 working days.

Request a Site AssessmentDownload Capability Profile

What you receive

  • 01Structural & shading survey
  • 02Sanctioned load and 70% cap check
  • 03Savings forecast and payback period
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