ROI Calculator
ROI Calculator
Enter your basic information to calculate the return on investment and potential benefits of installing a photovoltaic system
Input Parameters
Calculation Notes
- Power generation calculated based on Vietnam's average sunshine conditions (1200 kWh per kW annually)
- Dynamically calculate self-consumption and grid export ratio based on actual electricity consumption
- Roof area limitation: approximately 0.17 kW can be installed per square meter
- System investment cost calculated at 18,000,000 VND/kW
- Considering 3% annual efficiency degradation of photovoltaic modules
Calculation Results
Energy Distribution
10-Year ROI Curve
FAQ
How long does it take to install a photovoltaic system?
Residential photovoltaic systems typically take 3-7 working days to complete installation, while commercial and industrial photovoltaic systems require 2-6 weeks depending on scale.
What is the lifespan of a photovoltaic system?
The design life of photovoltaic modules is typically over 25 years, with actual service life up to 30 years. Inverters typically have a lifespan of 10-15 years and require periodic replacement.
Does installing a photovoltaic system require government approval?
Yes, installing a photovoltaic system in Vietnam requires applying for grid connection permission from local power departments. Our team can assist you in completing all necessary approval processes.
Can the system still work normally during continuous rainy days?
During rainy days, the power generation of the photovoltaic system will decrease, but it can still generate some electricity. If an energy storage system is installed, stored electricity can be used.
Does the photovoltaic system require daily maintenance?
The maintenance of photovoltaic systems is relatively simple, mainly including regular cleaning of photovoltaic panels and checking system operation status. We provide 5 years of free operation and maintenance services to give you peace of mind.