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Solar savings calculator
Enter your monthly electricity bill, or start from a real example. We size a system, estimate what it costs and show how fast it pays for itself.
- Per unit, assumed tariff
- ৳10.5
- Per kW each day
- 3.8 kWh
- Per kW, on-grid
- ৳62,000
- System life
- 25 yrs
Start from a worked example or enter your own bill below
৳
৳2,000৳10 lakh
System type
Estimates use average Bangladesh sunshine and current equipment prices. A site survey gives the exact figure.
Recommended system
16 kW
Estimated cost ৳9,92,000
- Payback
- 4.3 years
- Saving each month
- ৳19,418
- Roof space
- 1,440 sq ft
- Panels (585 W)
- 28
- CO2 avoided each year
- 13.8 tonnes
- Net saving over 25 years
- ৳48,33,400
How we work it out
Estimates use average Bangladesh sunshine and current equipment prices. A site survey gives the exact figure.
- Electricity price
৳10.5 per unit
A blended commercial tariff including demand charge and VAT. Homes on lower slabs save a little less per unit.
- Solar yield
3.8 units per kW a day
The Bangladesh average for a south-facing array at 15 to 23 degrees, after inverter and cable losses.
- Share of bill covered
About 75%
We size for daytime use so almost every unit is consumed on site, which keeps payback short without relying on export.
- On-grid system cost
৳62,000 per kW
Tier-1 panels, a string inverter, galvanised structure, cabling, protection, installation and net-metering paperwork.
- Hybrid system cost
৳1,05,000 per kW
Adds a hybrid inverter and lithium (LiFePO4) battery for backup during load-shedding.
- Roof space
90 sq ft per kW
Shade-free, flat or sloped roof area including walkways for cleaning and maintenance.
- Carbon saved
0.62 kg CO2 per unit
Grid emission factor for Bangladesh, where most power still comes from gas, oil and coal.
- System life
25 years
Panels carry a 25 to 30-year output warranty. The 25-year figures assume today's tariff, so real savings are likely higher.
Your real figure depends on roof direction, shading, your tariff slab and how much power you use in daylight. Book a free site survey for an exact proposal.
Allow about 90 square feet of shade-free roof for each kilowatt. A 5 kW home system needs roughly 450 square feet; a 500 kW factory plant needs about 45,000 square feet.
Turn the estimate into a real proposal
An engineer visits, checks your roof and meter, and sends a written design with fixed pricing within a week.