Referral Solar Portland systems have a production guarantee that ranges from 25-30 years. You can also count on us for repairs and maintenance; we carry 2-year guarantees on panel installation. Additionally, we have a variety of solar power portland product guarantees including a 10-year guarantee on inverters and a 25-year guarantee on modules.Referral Solar Portland are committed to providing the best-in-class options for our customers in the surrounding areas of Portland .
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