To help homeowners tackle this tangle of information, PNNL researchers Jessica Kerby and Bethel Tarekegne published an open-access guide to rooftop solar and BESS in Renewable Energy Focus.
Not every home is an ideal candidate for rooftop solar. Several factors determine your roof's solar suitability and potential energy production. Roof Age and Condition: Your roof should be in good condition with at least 10-15 years of remaining life.
Without BESS, the same household could install 10 kW of rooftop solar, which would cost $28,700 and save $1,567 per year. PGE and the state of Oregon both offer incentives for rooftop solar and battery energy storage. With the utility, state, and federal incentives, the combined solar and BESS system could be paid back within 11 years.
Roof Age and Condition: Your roof should be in good condition with at least 10-15 years of remaining life. Installing solar on an aging roof that needs replacement within 5-10 years can result in costly panel removal and reinstallation fees, typically $3,000-$5,000.
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