A first estimate
for your rooftop.

Four inputs give a rough system size, price range, saving and payback for grid-tied solar. It is a starting point for a conversation, not a quotation: a site survey decides the real design.

Your site

How do you want to enter your use? Units (kWh) a month Bill amount a month

Units used a month (kWh)

On your bill as “units” or “kWh”. Use an average month.

Price you pay per unit (Tk/kWh)

Starts at the national average after the June 2026 rise. Commercial and industrial rates are higher: energy charge ÷ units on your bill gives yours.

Share of electricity used in daylight hours 60%

Solar only replaces what you use while the sun is up. Day-shift factories are often higher; night operations lower.

Days the site runs a week

On closed days the panels still produce, but that output is not used.

Usable roof area (m², optional)

Open roof without tanks, stair rooms or heavy shade.

Estimate

Enter your monthly units to see an estimate.

Ask for a site assessment

Terms of this estimate

This is a preliminary estimate, not an offer or a quotation. No agreement is made by using it.
Prices are indicative, exclude VAT and other taxes, and are reviewed every six months. The prices here were set on 10 October 2026 and are valid until 10 April 2027; after that date the calculator stops showing prices until they are updated.
The final design, output and price are set out in a written proposal after a site survey. They can differ from this estimate because of site conditions, equipment availability, supplier prices, exchange rates and duties.
Savings and payback depend on your actual electricity use, tariffs and weather. They are not guaranteed.
Equipment warranties are given by the manufacturers under their own warranty certificates.
What you enter stays in your browser. Nothing is sent to Sun Solution unless you submit the enquiry form.

What the estimate assumes

Version 2026-10-10-v1, approved by Sun Solution on 2026-10-10. Simple payback is the price divided by the yearly saving after upkeep; it ignores panel ageing, financing, tax and tariff changes.

Item	Value	Basis
Solar yield	1,250 / 1,350 / 1,450 kWh per kWp a year	Global Solar Atlas average for 67 Bangladeshi factory sites is 1,468 kWh/kWp (Talut, Bahaj & James, Energies 15(11):4037, 2022). Scenarios sit below it to allow for heat, dust and flat roofs.
Roof area	6 m² per kWp	Panel area about 4.3 m² per kWp (JA Solar JAM66D45 625 W: 2.70 m²) plus spacing and walkways.
Price	Tk 45,000 to 37,500 per kWp, excl. VAT, by size, shown ±10%	Built from Sun Solution quotation Rev 02 (6 Oct 2026) line items: panels, cables, protection, earthing, structure, installation, transport; on-grid inverter priced from the supplier list with the same mark-up as Rev 02.
Price validity	Set 10 October 2026, valid until 10 April 2027	Owner instruction (10 Oct 2026): calculator prices change every 6 months. After the date the page shows sizes and energy only.
Upkeep	1% of price a year	Planning assumption for cleaning, checks and minor parts.
Surplus solar	Valued at Tk 0	Net metering eligibility depends on the connection (SREDA Net Metering Guidelines 2025); not assumed.
Starting price per unit	Tk 10.63 per kWh, editable	BERC average retail price after the June 2026 increase (Prothom Alo, 3 Jun 2026; The Daily Star, 4 Jun 2026). Commercial and industrial rates are higher, so this understates savings for most buyers.
VAT on electricity bills	5%	Used only when a visitor enters a bill amount instead of units.
Minimum system	5 kWp	Smallest commercial system Sun Solution quotes.
System size	Covers 80% of daytime use on working days	Leaves headroom for light days and closed days, when surplus output has no value here.

Let’s talk
about your rooftop.

Tell us a little about your business and where you want to begin.

01354-231773 WhatsApp: 01354-231773 info@sunsolutionbd.com

Moon Complex, 2nd Floor
10/11 Wise Ghat Road, Patuatuli
Dhaka, Bangladesh