Solar Energy in Birgañj
Birgañj is located at 27.0°N, 84.9°E in Nepal. Here's what solar energy looks like for homeowners in this area.
Annual Irradiance
1,707
kWh/m²
Peak Sun Hours
4
hrs/day
4 kWp Output
5,872
kWh/year
Solar Score
68
/ 100
What does this mean for your roof?
Birgañj receives approximately 1,707 kWh/m² of solar irradiance per year, which translates to 4 peak sun hours per day. This is good for residential solar energy production.
With a solar score of 68/100, Birgañj ranks #35 of 52 cities in Nepal for solar potential in our atlas.
A typical 4 kWp residential solar system (9 panels) in Birgañj would produce approximately 5,872 kWh per year, sized for the average household in Nepal.
The best months for solar production in Birgañj are May – August, while the lowest production occurs during November – January. Being in the northern hemisphere, south-facing roofs capture the most annual sunlight.
Estimated savings in Birgañj
System Cost
₨505,000
4 kWp, before incentives
Annual Savings
~₨33,500
At ₨5.72/kWh
Payback Period
~15 years
Before local incentives
25-Year Net Result
~₨565,000
Savings minus system cost
These are approximate figures based on a standardized household consumption of 5,000 kWh/year and an estimated electricity rate of ₨5.72/kWh in Nepal. Local incentives may reduce the upfront cost — check current subsidy, tax-credit, or VAT programs in Nepal, as these can meaningfully shorten the payback period.
Figures are estimates based on typical system assumptions and the latest available electricity-price and billing data for Nepal. Actual costs, tariffs, net-metering rules, and incentives vary by utility and change over time — confirm with a local installer or energy authority before making decisions.
How solar billing works in Nepal
Exported energy spins your meter back, offsetting what you draw later.
In Nepal, rooftop solar is often compensated through an arrangement that resembles net metering, where the electricity you send to the grid is typically credited against the electricity you draw from it. In many areas only the net difference at the end of a billing period is charged, so surplus generation in sunny months may help cover quieter ones. The exact crediting rules, billing windows, and any caps vary by region and utility and should be confirmed locally.
Get your exact numbers
Our calculator uses NASA satellite data for your precise location — not city-level estimates. Free, instant, no signup.
Solar tips for Birgañj homeowners
Face panels south
In the northern hemisphere, south-facing panels capture the most annual sunlight. East-west split systems also work well.
Optimal tilt angle
For Birgañj, the energy-optimal panel tilt is about 24° from horizontal.
Size your system right
For the average household in Nepal, a 4 kWp system (9 panels) covers most electricity needs. Use our calculator for a personalized estimate.
Check local incentives
Local incentives may reduce the upfront cost of residential solar — check current subsidy, tax-credit, and VAT programs with your energy authority in Nepal.
Gear to prepare for solar
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Solar in other Nepal cities
Frequently asked questions about solar in Birgañj
How much do solar panels cost in Birgañj?
A typical 4 kWp residential solar system in Birgañj, Nepal costs approximately ₨505,000 before incentives — this is an estimate based on typical regional pricing. Local incentives such as subsidies, tax credits, or VAT exemptions may reduce the upfront cost; check current programs in Nepal.
How is exported solar energy credited under net metering in Nepal?
Under a net-metering-style arrangement, the energy your system exports to the grid in Nepal is typically credited against the energy you import, so you are often billed mainly on the net amount. How those credits are valued, whether they roll over, and how long they last can vary by region and utility, so it is best to confirm the current terms with a local installer or your energy provider.
How much electricity do solar panels produce in Birgañj?
A 4 kWp solar system in Birgañj produces approximately 5,872 kWh per year, based on 4 peak sun hours per day and 1,707 kWh/m² annual irradiance.
What is the solar panel payback period in Birgañj?
Based on Nepal's electricity rate of ₨5.72/kWh, a 4 kWp system in Birgañj pays for itself in approximately 15 years before incentives. After that, the electricity it generates is essentially free for the remaining panel lifespan of 25+ years.
Which direction should solar panels face in Birgañj?
In Birgañj, panels should ideally face south since it's in the northern hemisphere. The optimal tilt angle is about 24° from horizontal.
How many solar panels do I need for my home in Birgañj?
A typical household in Nepal uses the equivalent of a 4 kWp system (9 panels). With 4 peak sun hours per day in Birgañj, this covers most electricity needs. Use our calculator for a personalized estimate.