The trailer cannot be claimed as a deduction but your energy efficient applicances may be claimed. You specific circumstances will determine what is or is not deductible. Please visit the following websites for more information.
Energy Incentives for Individuals: Residential Property Updated Questions and Answers
https://www.irs.gov/newsroom/energy-incentives-for-individuals-residential-property-updated-question...
List of ENERGY STAR Energy Efficient Products
https://www.energystar.gov/products/products_list
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