Solar savings & payback calculator
Estimate how much you save per month with a rooftop solar installation under the net-metering policy, including payback period and 25-year return.
Solar payback inputs
Typical Dhaka rooftop: 3–10 kW residential, 20–100 kW commercial.
2026 Bangladesh average: ৳65,000–৳80,000 per kW turn-key.
Use the rate of the top slab your meter currently hits.
Share of generated units sold back to the grid under net metering.
Monthly savings
৳ 6782
Yearly savings
৳ 82516
Payback
4.2 yrs
Daily generation
23.5 kWh
Upfront cost
৳ 350,000
25-year net return
৳ 1589115
Does rooftop solar actually pay back in Bangladesh?
Real numbers on system size, monthly savings, payback period, and where the assumptions can be wrong.
The headline numbers
- Dhaka averages 4.7 peak-sun-hours — 1 kW of panels generates ~4.7 units a day
- A 5 kW residential system saves ~৳5,000–7,000/month and pays back in 5–6 years
- Panels carry 25-year warranties; one inverter replacement around year 10
How it works
The basics of rooftop solar in Bangladesh
A 1 kW solar array in Bangladesh produces, on average, 4.5–5 units of electricity per day. The exact number depends on roof orientation, shading, dust, and the time of year. Multiply system size by 4.7 by 30 to get monthly generation; by 365 to get yearly.
Under the BPDB net-metering policy (most recently updated 2024), any generation you don’t consume directly flows into the grid and credits your meter at the retail tariff. A 5 kW residential array can offset around 700 units a month.
1 kW system
~4.7units/day
5 kW system
~700units/month
Avg cost (2026)
৳70Kper kW
Payback math
2026 prices, real-world example
A 5 kW system at ৳70,000/kW = ৳350,000 installed. With ৳80,800 yearly savings at the LT-A 301–400 slab rate, simple payback is ~4.3 years.
Panels carry 25-year linear performance warranties. After payback, you have ~20 years of nearly free energy net of one inverter swap (৳40,000–70,000) around year 10.
Caveats
Where the numbers can be wrong
The process
How to actually install solar (residential)
Find an EPC vendor
Apply to your distribution company
Site survey
Approval (30–60 days)
Install + inspect
Commission
Frequently asked questions
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Related guides & services
Rooftop solar & net metering
Thinking of rooftop solar? See if you qualify under the 2025 net-metering rules, estimate your savings, and follow the 6 steps to apply on the official portal.
Solar net metering: how to sell electricity back to the grid
SREDA's net-metering rules in plain language — who qualifies, the application process, what a 5 kW rooftop earns, and the real payback period.
Get a new connection
Applying for a new meter? Here are the documents, fees and steps for each company — and the official portal to apply on.
Low Tension (LT) rates
LT-A, LT-B, LT-C, LT-D and LT-E rates — the categories most homes and shops fall under.