Green Attic Roofing, a US-based roofing contractor and certified Tesla installer, has introduced Tesla’s TSP-415 and TSP-420 solar panels for residential installations in Chicago. The TSP-415 delivers 415 W at 20.3% efficiency, while the TSP-420 delivers 420 W at 20.5% efficiency, offering two defined output options for homeowners. Both Tesla panel models measure 1805 x 1135 x 40 mm and weigh 22.3 kg, supporting consistent installation planning across roof types. Electrical specifications include Voc 40.92 to 40.95 V and Isc 12.93 to 13.03 A, and the panels are rated for a maximum system voltage of DC 1000 V. The modules operate between -40°F and +185°F and meet IEC/UL 61730 and IEC 61215 standards. According to the release issued by Green Attic Roofing, installation pricing can start at $60 per sq ft, while traditional systems range from $2.90 to $3.50 per watt, and eligible installations qualify for a 30% Federal Solar Tax Credit.
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