Singular or plural 'electrical loads'

I have the following sentence:

"The methods can be used with every kind of flexible electrical loads "

Should load be in singular or plural?By flexible electrical loads I am referring to e.g. electric vehicles, heat pumps, dishwashers

Consider another example: "We employ every kind of cook." The noun cook is generally a countable noun, yet it is used in the singular here.

Weather Vane

Generally, "kind of" (in this sense) expects a singular noun.

Hot Licks

"every kind of load" or "all possible loads"

shogun

Compare the simpler but parallel example 'every kind of car' and 'every kind of cars'. One is ungrammatical.

Edwin Ashworth