Silfab SIL-440QD Solar Panel - The Silfab SIL-440QD solar panel is part of the Silfab PRIME NTC series that features next-generation N-Type cell technology. These sleek triple black 440 Watt solar panels are as beautiful as they are efficient and reliable. The advanced, innovative design delivers the highest performance. Exceptionally durable. Exclusively manufactured in the United States. All Silfab solar