Vlastita potrošnja prati proizvodnju električne energije.

Vlastita means one’s own, self-, or internal/own depending on context.

In this sentence, vlastita potrošnja is best understood as self-consumption or own consumption. In energy-related language, this often means the amount of electricity that is consumed by the same system or producer that generates it.

So this is not just a random adjective; it is part of a common technical expression.

Because potrošnja is a feminine singular noun, and the adjective has to agree with it.

Agreement in Croatian means the adjective must match the noun in:

• gender
• number
• case

Here:

• potrošnja = feminine singular
• so the adjective must be vlastita = feminine singular nominative

That is why you get:

• vlastita potrošnja

not:

• vlastiti potrošnja (wrong, because vlastiti is masculine singular nominative)

Potrošnja is in the nominative singular because it is the subject of the sentence.

The verb is prati = follows / tracks, and the thing doing that action is vlastita potrošnja.

A simple structure is:

• Vlastita potrošnja = subject
• prati = verb
• proizvodnju električne energije = object

So potrošnja is nominative because it is the grammatical subject.

Because the subject is singular.

The subject is:

• vlastita potrošnja = self-consumption

That whole phrase is singular, so the verb must also be singular:

• potrošnja prati = consumption follows/tracks

If the subject were plural, you would use prate.

For example:

• Vlastite potrošnje prate proizvodnju.
  = Self-consumption patterns follow production.

But in your sentence, the subject is singular, so prati is correct.

Proizvodnju is accusative singular because it is the direct object of prati.

The verb pratiti normally takes a direct object in the accusative:

• pratiti proizvodnju = to follow/track production
• pratiti stanje = to monitor the situation
• pratiti razvoj = to follow development

So in this sentence:

• prati koga/što?
• proizvodnju

That is why proizvodnja becomes proizvodnju.

Električne energije is in the genitive singular.

It depends on the noun proizvodnja:

• proizvodnja električne energije = production of electrical energy / electricity production

This is a very common Croatian pattern:

• proizvodnja čelika = production of steel
• potrošnja vode = consumption of water
• razvoj tehnologije = development of technology

So the structure is:

• proizvodnju = accusative singular, because it is the object of the verb
• električne energije = genitive singular, because it depends on proizvodnja

In other words, the whole object is:

• proizvodnju električne energije

and inside that phrase, električne energije tells you what kind of production.

Because energija is not the direct object of the verb here.

The verb prati directly governs proizvodnju, not energiju.

Compare:

1. Prati proizvodnju električne energije.
   = It tracks the production of electrical energy.

2. Prati električnu energiju.
   = It tracks electrical energy.

In sentence 1, energije depends on proizvodnja, so it goes into the genitive.
In sentence 2, energiju would be the direct object itself, so it would be accusative.

Not necessarily only in the physical sense.

The verb pratiti can mean several related things:

• to follow
• to accompany
• to monitor
• to track
• to keep up with

In this sentence, the most natural meaning is something like:

• self-consumption tracks electricity production
• self-consumption follows the production of electricity

So this is more about matching a pattern or changing in line with something, not physically walking behind it.

Usually no, not in this sentence.

Svoj is a reflexive possessive pronoun, meaning one’s own / his own / her own / their own, and it normally refers back to some person or thing already established in the sentence.

But here there is no clear possessor like the user, the company, or the household inside the sentence itself. Because of that, vlastita potrošnja is much more natural as a general technical term meaning self-consumption.

So:

• vlastita potrošnja = natural here
• svoja potrošnja = would usually need a clearer owner or referent

The word order can change, because Croatian word order is relatively flexible.

Your sentence is neutral and natural:

• Vlastita potrošnja prati proizvodnju električne energije.

But you could also say:

• Proizvodnju električne energije prati vlastita potrošnja.

This version puts more focus on proizvodnju električne energije.

The cases keep the sentence clear, so Croatian does not rely on word order as much as English does. Still, the original order is a very normal neutral choice.

Most likely it expresses a general fact, regular pattern, or technical relationship.

Croatian present tense can be used for:

• something happening now
• a habitual action
• a general truth
• a technical or scientific statement

Here it sounds like a general statement such as:

• self-consumption tends to track electricity production

So even though the verb is present tense, it does not have to mean right this second.

A very literal translation is:

• Self-consumption follows the production of electrical energy.

But in natural English, especially in technical or energy contexts, you might also say:

• Self-consumption tracks electricity production.
• Own consumption follows electricity generation.
• Self-consumption is aligned with electricity production.

Which English version is best depends on the context, but grammatically the Croatian sentence is straightforward and correct.