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Solar Savings Calculator
Monthly savings, payback period & ROI from solar installation.
🌞 BD & Global · Grid-Tied · Off-Grid · Hybrid
Solar Panel Calculator Bangladesh
Calculate how many solar panels you need, the total system size in kWp, and estimated installation cost for your home or business. Supports grid-tied, off-grid, and hybrid systems. Accurate for Bangladesh — works globally too.
BD market rates 2025-26 · 5.0 peak sun hours default · 80% system efficiency
Solar Panel Calculator
Panel count · System size (kWp) · Installation cost · CO₂ saved
Ceiling Fan75W
4
LED Light10W
8
TV (32–43")80W
1
Refrigerator150W
1
AC (1 ton)1200W
0
Desktop PC200W
1
Water Pump500W
0
Electric Iron1000W
0
BD average: 4.5–5.5 hrs/day
BD market 2025: ৳65–90/watt installed
System efficiency factor: 80% (accounts for inverter loss, wiring, temperature derating). For AC-heavy setups, select Hybrid system. Grid-tied requires BPDB net metering approval.
Total Load
810 W
6.5 kWh/day
System Size
2 kWp
recommended
Panels Needed
5
400W panels
Est. Cost
৳140,000
installed
Environmental Impact
Your system will offset approximately 1,633 kg of CO₂ per year — equivalent to planting ~82 trees annually.
How to Use
- 1Select your system type — Grid-Tied, Off-Grid, or Hybrid.
- 2Set the quantity of each appliance you want to run on solar.
- 3Enter any other loads in total watts.
- 4Set how many hours per day you run those appliances.
- 5Choose your panel wattage (400W is standard in BD 2025).
- 6Enter peak sun hours (BD default: 5.0) and your currency.
- 7Enter installation cost per watt to get total system cost.
- 8Review panel count, system size in kWp, and estimated cost.
Example Calculation
- 4 fans (75W) + 8 LED lights (10W) + 1 TV (80W) + 1 fridge (150W) = 760W load
- Running 10 hours/day → 7.6 kWh/day
- Peak sun: 5 hrs/day · System efficiency: 80%
- Required: 7.6 ÷ (5 × 0.8) = 1.9 kWp
- Using 400W panels: 5 panels needed
Result: 5 × 400W panels · 2.0 kWp system · Cost ~৳140,000 installed
Formula Used
Daily energy (kWh) = Total load (W) × Hours per day ÷ 1000. Required kWp = Daily kWh ÷ (Peak sun hours × 0.80). Panels needed = Required kWp × 1000 ÷ Panel wattage. System cost = Actual kWp × 1000 × Price per watt. The 0.80 factor accounts for inverter loss, wiring resistance, and temperature derating typical for Bangladesh's climate.
Solar Installation Tips for Bangladesh
- 1Use 400W or 450W panels — best balance of efficiency and price in Bangladesh market 2025
- 2Hybrid systems are most practical for urban Bangladesh — backup during load shedding + bill reduction
- 3Install panels facing south at 23° tilt for maximum output in Bangladesh's latitude
- 4Get at least 3 quotes from solar installers — prices vary 20–30% between companies
- 5Buy panels with a 25-year performance warranty and 10-year product warranty minimum
- 6A 3 kWp hybrid system typically pays back in 4–6 years in BD (depending on electricity rate)
- 7Avoid cheap Chinese no-brand inverters — use Growatt, Solis, or Victron for reliability
- 8Clean panels monthly — dust and bird droppings significantly reduce output in BD climate
Frequently Asked Questions
How many solar panels does a typical Bangladeshi home need?
An average urban apartment in Bangladesh (fans, lights, TV, fridge) uses 10–15 kWh per day. Using 400W panels and BD's 5 peak sun hours, you typically need 6–10 panels (a 2.5–4 kWp system). Air-conditioned homes may need 12–20+ panels.
What is the cost of solar installation in Bangladesh in 2025-26?
A complete rooftop solar system costs approximately ৳65–90 per watt installed in Bangladesh (2025-26 market rate). A 3 kWp grid-tied system costs ৳195,000–270,000 fully installed. Hybrid systems with batteries cost 30–50% more.
What is peak sun hours in Bangladesh?
Bangladesh receives an average of 4.5–5.5 peak sun hours per day, varying by region. Sylhet and Chittagong receive slightly more sun than Dhaka. This calculator uses 5.0 hours as the default, which is a conservative estimate suitable for most of Bangladesh.
Grid-tied vs off-grid vs hybrid — which is better for Bangladesh?
Grid-tied is cheapest and best if you have reliable BPDB power and BPDB net metering approval. Off-grid suits areas with frequent power cuts or no grid access. Hybrid (battery + grid + solar) is the most practical for most Dhaka and urban homes — you get backup power AND reduce your bill.
Is BPDB net metering available in Bangladesh?
Yes. BPDB offers net metering for approved residential customers. You sell excess solar power back to the grid at a rate set by BPDB (typically lower than the retail rate). Applications are made through your local BPDB office. Requires a bidirectional meter and system certification.
Which solar panels are best in Bangladesh?
Top brands available in Bangladesh (2025): JA Solar, Jinko Solar, Risen Energy, and Canadian Solar are the most commonly used for residential. Local assemblers also offer panels. Always buy panels with a 25-year power output warranty from a certified dealer.