Financial Projection
Profitability
Estimate what your installation saves you, in your currency and at your own energy price.
Your current energy
System cost
%
Advanced assumptions
Net Investment
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Payback time
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First-year savings
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Net gain over 25 years
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Annual return (IRR) ?
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Solar energy cost (per kWh) ?
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Cumulative cash position
Cumulative cash position
This is an estimate, not a quote. Compare offers from several installers.
Solar Investment & ROI FAQs
What is LCOE in solar energy?
LCOE stands for Levelized Cost of Energy. It represents the average minimum price at which the electricity generated by the solar panels must be sold to offset the costs of building and operating the system over its lifetime. It is the best metric to compare solar against grid electricity prices.
How is the solar payback period calculated?
The payback period is calculated by taking your net investment (initial cost minus incentives) and dividing it by your first year's energy savings, while factoring in electricity price inflation (escalation) and panel performance degradation over time.
What is solar panel degradation?
Solar panels slowly lose efficiency over time due to UV exposure and weather. Most modern Tier 1 solar panels degrade by about 0.5% per year, meaning they will still produce around 85% to 90% of their original output after 25 years.