EquipmentUp to date · Jan 15, 2026
Solar Panel
A photovoltaic (PV) module that converts sunlight into electricity. Multiple panels are combined to form a solar array.
Why It Matters
Panels are the core of any solar system. Their efficiency, warranty length, and degradation rate directly affect how much energy you produce over 25+ years.
Real-World Example
A typical residential panel is rated at 400W and measures about 6.5 ft × 3.5 ft. A 8 kW system would use roughly 20 panels.
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Module Efficiency
The percentage of sunlight that a solar panel converts into electricity. Modern panels range from 15-22% efficient.
Degradation Rate
The annual decrease in solar panel efficiency. Modern panels typically degrade 0.3-0.5% per year.
Inverter
A device that converts direct current (DC) electricity from solar panels into alternating current (AC) electricity used by your home.