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Updated about 8 years ago on . Most recent reply

15.6 MW Solar Power $46,000 question
Most Popular Reply
Responses to your points:
2) yes solar panels output diminishes over time, almost all are guaranteed to be producing a minimum of 80% of their initial output at year 25, twenty years after they already paid for themselves and they will continue to produce for many decades.
3) inverters are typically warrantied for 10 years, again, long after they already paid for themselves. My system has not been touched in 6 years. No moving parts, almost zero maintenance over their lifetime.
5) most do, mine does. Panel type has nothing to do with selling power back to power company. You technically give all your power back to the grid, you can't run your house off of a solar system when the power is out (without a backup battery system due to variability of solar output).
6) I wouldn't install on an old roof, no issues otherwise.
7) solar company will discuss location and output before instillation, non issue. Micro inverters allow each panel to work to full capacity and won't be pulled down by an adjacent shaded panel.
*you clearly know nothing about solar and have spent no time doing the math. People are fools to not buy a property with a paid for solar system for the rate arbitrage alone. Home loan 5%, solar return 15%, get extra home loan to pay for higher value of solar house and pocket the difference. YOU LITERALLY GET PAID TO BUY A SOLAR HOUSE/BUILDING.