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If rates increase at 3% per year, the monthly bill could rise to approximately $358 after 25 years, costing nearly $77,000 in total—meaning a savings of around $23,000 for the solar-equipped homeowner.
With a 5% increase, the bill could reach around $567, costing above $100,000, translating to savings of about $46,000.
In a more dramatic 10% annual increase scenario, the monthly bill could explode to approximately $1,734, leading to a staggering cost of over $270,000 for electricity over 25 years, with potential savings of $153,000 for the solar homeowner.
These projections underscore the substantial savings that solar installations can yield over decades, provided conditions are favorable.