You are mixing things up. On the one side there's the verbiage. On the other hand there's the units. You are mixing these things up in an extremely verbose way and I don't care for for it. Please just stop trying to actively mislead us all.

But hey, you reached your goal, killing the velocity of my comment way up there.

You planted the seed of "doubt".

You keep repeating that as if you think it's going to convince somebody, but, in fact, when you divide an amount of energy produced, such as 4 terawatt hours, by a length of time such as a year, you get a power, such as 500 megawatts, which does indeed tell you how much energy was produced over that length of time.

Domestically the most common unit of energy is calories in the countries I'm familiar with, but households also frequently measure energy in gallons of gasoline, liters of gasoline, British Thermal Units, "therms", cubic feet of gas, cubic meters of gas, kilowatt hours, cords of wood, bushels of corn, joules, and "tons", meaning tons of ice (often abused as a measure of power, the implicit denominator being "per day"). Additional common units of energy rarely used in households include barrels of oil, "megatons" (this time of TNT rather than ice), toes (ton of oil equivalents), quads (quadrillion BTU), foot-pounds, and, implicitly, horsepower seconds. The vulgar news media often use the "household-day", which is roughly as well defined as the "heap".

This is like the seventeenth century situation where cloth was sold by the "ell", but each kind of cloth was measured by a different ell. The Flemish ell was a different length from the English ell or the Scottish ell. This nonsense survives today in the custom current in the less advanced countries of weighing gold and silver in "troy ounces" and other commodities such as pepper in a different "ounce" that is about 10% smaller.

But the situation with energy is much worse, because transmuting electrical energy into gasoline, or vice versa, is enormously less inefficient than transmuting pepper into gold. Different forms of energy are far more often equivalent than different forms of mass.

The insight underlying the SI system of units is that calculations become much easier if you use a consistent set of units derived in a simple way from a minimal set of base units such as the kilogram and meter. How much kinetic energy is going to kill a 100-kg man falling from a building at 10 meters per second? Trivially, 50 kilojoules. How much energy does a 10-watt lightbulb consume in 5000 seconds? 50 kilojoules. If you are paying US$0.02 per megajoule for gasoline, US$0.01 per megajoule for natural gas, and US$0.04 per megajoule for electrical energy, what's the cheapest way to heat your house? Gas, unless your electric heat pump has a coefficient of performance over 4.

By contrast, if the different prices are expressed in different units, it adds difficulty to every kind of reasoning, to the point that there seems to be a popular misconception that megawatts are not even the right unit for measuring the solar energy production of a country.

Kilowatt hours are an especially silly unit. A watt is by definition a joule per second, so measuring energy in kilowatt hours is similar to measuring distance in mph-minutes. An mph-minute works out to be exactly 88 feet, and a kilowatt hour is exactly 3.6 megajoules. Just use megajoules! Stop making everything more difficult.