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If you've had some solar panels for a while, you've probably already taken time to calculate how much solar saves on your electric bill . However, as your solar power system ages, it begins to lose some efficiency in generating power. The good news is that solar panels should last 25 to 30 years, even with slightly deteriorating power generation over time.

If you have older solar kits that are approaching the end of their expected lifespan or that just aren't working, you may wonder whether you should spend money repairing them. It may have taken years for the solar panels to pay for themselves through electric bill savings after the initial installation, so is it worth repairing older units now? Is it better to simply remove outdated kits than to spend money on repairs or replacement?…