Standbyforbruget er lavt.

Because Danish normally writes compound nouns as a single word.

Here, standbyforbruget is built from:

• standby
• forbrug = consumption / usage
• -et = the definite ending

So Danish prefers one combined noun where English would often use several words, such as standby consumption.

This is very common in Danish:

• elforbrug = electricity consumption
• vandforbrug = water consumption
• energiforbrug = energy consumption

-et is the definite article ending for a neuter singular noun.

So:

• et forbrug = a consumption / a usage
• forbruget = the consumption / the usage

In Danish, the definite article is often attached to the end of the noun instead of being a separate word like English the.

Because standbyforbrug is neuter, its definite singular form becomes standbyforbruget.

Because the adjective agrees with the noun.

The noun standbyforbruget is based on forbrug, which is a neuter noun (et forbrug). When an adjective is used predicatively after er, a neuter singular noun usually takes the -t form of the adjective.

So:

• forbruget er lavt
• niveauet er højt
• huset er stort

Compare with common-gender nouns:

• prisen er lav
• bilen er stor

So lavt is used because the thing being described is neuter singular.

Er is the present tense of at være = to be.

Unlike English, Danish does not change the present tense form depending on the subject:

• jeg er
• du er
• han er
• vi er
• de er

So er stays the same for all persons and numbers in the present tense.

It is originally borrowed from English, but it is very common in Danish, especially in technical and everyday device-related language.

Danish often keeps English technical terms, especially in electronics, computers, and appliances. So words like standby, display, scanner, and printer are very familiar in Danish.

Even when the first part is borrowed, Danish still treats the whole compound like a normal Danish noun:

• standbyforbrug
• standbyfunktion
• standbytilstand

Yes, but the meaning changes slightly.

• Standbyforbruget er lavt. = The standby consumption is low.
• Standbyforbrug er lavt. = Standby consumption is low or standby consumption is generally low.

The version with -et sounds more specific, as if you are talking about the standby consumption of a particular device, model, or situation.

The version without -et is more general or category-like.

Yes. This is the normal Danish word order for a simple statement:

• Standbyforbruget = subject
• er = verb
• lavt = subject complement / adjective

So the pattern is:

Subject + verb + description

This is very similar to English:

• Prisen er høj.
• Bilen er ny.
• Standbyforbruget er lavt.

You usually put ikke after the verb in a main clause:

• Standbyforbruget er ikke lavt.

That is the standard Danish position for negation in a sentence like this.

So the pattern is:

Subject + verb + ikke + adjective

Examples:

• Prisen er ikke høj.
• Maskinen er ikke ny.
• Standbyforbruget er ikke lavt.

The exact pronunciation can vary a bit, but a learner-friendly approximation is:

STAND-by-for-BROO-et

A few helpful points:

• standby is pronounced much like the English word, though often with a Danish accent
• forbrug has a soft Danish r
• the ending -et in speech is often quite reduced

What matters most at first is getting the stress roughly right:

• main stress on standby
• another noticeable stress on brug

You do not need perfect native pronunciation to be understood.

Because Danish, like English, usually uses low rather than small for quantities such as consumption, levels, prices, or rates.

So:

• lavt forbrug = low consumption
• lav pris = low price
• lavt niveau = low level

Using lille would sound wrong or at least unnatural here, because lille is more about physical size or smallness in a different sense.

In normal writing, no: it should stay as one word, standbyforbruget.

Danish is much stricter than English about writing compounds together. Splitting them can look incorrect or confusing.

So write:

• standbyforbruget

not:

• standby forbruget
• standby forbrug et

In speech, of course, the parts may sound clearly separable, but in writing they form one compound noun.

It is natural Danish and sounds especially common in technical, consumer, or product-information contexts.

You might see it in:

• appliance descriptions
• energy labels
• manuals
• product websites
• reviews

It is not unusually formal, but it does sound like the kind of sentence used when describing a device or product specification.