"copious energy" is a correct and usable phrase in written English.
You can use it to refer to someone or something that has a plentiful and abundant supply of energy. For example, "The solar panels on our roof provided our family with copious energy all summer long."
Mr. Cummings has yet to orchestrate his opera, but the pianist Charity Wicks played with copious energy and nuance here.
Having an organ using copious energy doing mostly nothing is an evolutionary dead end, if nothing else.
Hydrogen-powered cars emit no carbon dioxide, but producing hydrogen, by splitting water or some other chemical reaction, requires copious energy, and if that energy comes from coal-fired power plants, then the problem has not been solved.
Accretion disks emit copious amounts of energy from the conversion of gravitational potential energy into radiation as the accreted material falls or spirals inward.
From their distance and their apparent luminosity, it was inferred that they emit copious amounts of energy; a single quasar might be brighter than a whole galaxy.
As the material plunges into the black holes, it emits copious amounts of energy in the form of light, which are observed as quasars.
The human body contains a copious amount of energy, and harvesting it can be used to charge smartphone batteries and power lightbulbs.
When the particles came into contact and the inevitable annihilations occurred in the earliest seconds of time, the universe was left only with matter particles swimming with copious amounts of energy.
But more important for the companies, it is a way to shave long-term operating costs at stores and restaurants, which consume copious amounts of energy and water for ovens and fryers, heaters and air conditioners, sinks and toilets.
As well as the obvious moral argument for supporting farmers in the developing world, in Kenya, certainly, manual production methods and lo-tech irrigation systems help to mitigate those air miles, while UK producers use copious amounts of energy to grow the same foods.
Fusion releases copious amounts of energy, and the sustained "burning" of hydrogen over the lifetime of a star is what causes them to shine.
