TT: form 8911 "The maximum credit is $1,000 or 30 percent of the installation cost whichever is lower" Actual is "the smaller of 30% of the property’s cost or $1,000"?

The wording means very different things, 30% of installation vs flat $1,000? Also, it says a credit of $30,000 "For property of a character subject to an allowance for depreciation (business/investment use property)." From my research rental property is subject to an allowance for depreciation. If I install an electric charger on a rental property is this credit applicable? Thank you!