Solar costs have deflated by 70% in the past decade to $800/kW in 2025. 60% has been the scale-up to mass manufacturing, and 40% has been rising efficiency of solar modules.
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Most solar generator reviews repeat spec sheets and ideal tests. A “2,000 Wh / 2,000 W” unit can still fail under mixed loads.
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Since solar panels typically last 25 to 30 years, most property owners should budget for at least one inverter replacement during their system's lifetime. Replacement costs typically represent 10 to 15% of total system expenses over a 20-year period.
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Home solar power systems can be utilized for 20 to 30 years, with warranties typically spanning 25 years.
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