Mrežni priključak provjerite neovisno o tome je li fotonaponska elektrana nova.

Mrežni priključak means grid connection, network connection, or mains connection, depending on context.

• mrežni = network / grid-related
• priključak = connection / hookup / connector

In a technical or energy context, mrežni priključak usually refers to the connection to the electricity grid.

Provjerite is the imperative plural form of provjeriti (to check).

In Croatian, this form is used:

• when speaking to more than one person, or
• when speaking politely/formally to one person

So here, provjerite means:

• check! (addressing several people), or
• please check (formal singular)

By contrast:

• provjeri = imperative singular, informal: check! said to one person you know well

This is very common in instructions, manuals, and official language.

Yes. Mrežni priključak is the direct object of provjerite.

The verb provjeriti takes an object in the accusative case. Here:

• nominative: mrežni priključak
• accusative: mrežni priključak

Because priključak is a masculine inanimate noun, its accusative singular is the same as its nominative singular. So the form does not change.

That is why you see:

• Mrežni priključak provjerite. = Check the grid connection.

Neovisno o tome means regardless of that, independently of that, or more naturally in English, regardless of whether...

Breakdown:

• neovisno = independently / regardless
• o = about / concerning / with respect to
• tome = that in the required case after o

As a whole, neovisno o tome is a fixed expression meaning:

• regardless of
• irrespective of

So:

• neovisno o tome je li... = regardless of whether...

Because the preposition o requires the locative case.

The pronoun to changes like this:

• nominative: to = that / it
• locative after o: tome

So:

• o tome = about that / with regard to that

In this sentence, neovisno o tome is a set phrase, so learners should remember it as a chunk:

• neovisno o tome... = regardless of...

Je li introduces an indirect yes/no clause. Here it means whether.

So:

• je li fotonaponska elektrana nova = whether the photovoltaic power plant is new

This can confuse English speakers because je li is also used in direct yes/no questions:

• Je li nova? = Is it new?

But inside a larger sentence, it often corresponds to English whether:

• Ne znam je li nova. = I don’t know whether it is new.
• Provjerite ... je li nova. = Check ... whether it is new.

They are often similar in meaning, but je li is generally the more standard and preferred form, especially in formal Croatian.

• je li = standard, common in writing and formal style
• da li = also heard and used, but often considered less formal or less preferred in standard usage

So in a sentence like this, je li is exactly what you would expect.

That is normal Croatian word order for an embedded yes/no clause.

The structure is:

• je li
  • subject + predicate adjective

So:

• je li fotonaponska elektrana nova
• literally: is whether the photovoltaic power plant new
• naturally: whether the photovoltaic power plant is new

Croatian word order is flexible, but this order is very standard and neutral.

Fotonaponska elektrana means photovoltaic power plant or solar power plant.

Breakdown:

• fotonaponska = photovoltaic
• elektrana = power plant / power station

In everyday English, a less technical translation might simply be solar installation or solar power plant, depending on context.

Because nova agrees with elektrana, which is a feminine singular noun.

Croatian adjectives must agree with the noun in:

• gender
• number
• case

Here:

• elektrana = feminine singular
• therefore new must be feminine singular too: nova

Compare:

• novi priključak = new connection (masculine)
• novo postrojenje = new facility (neuter)
• nova elektrana = new power plant (feminine)

Yes. In je li fotonaponska elektrana nova, the adjective nova is a predicate adjective.

That means it is not simply modifying the noun inside the noun phrase. It is saying something about the subject:

• fotonaponska elektrana = the photovoltaic power plant
• je ... nova = is new

So the clause means:

• whether the photovoltaic power plant is new

Yes. A very common alternative is:

• Mrežni priključak provjerite bez obzira na to je li fotonaponska elektrana nova.

This also means Check the grid connection regardless of whether the photovoltaic power plant is new.

Comparison:

• neovisno o tome = a bit more formal/technical
• bez obzira na to = very common and natural

Both are correct.

Yes, it sounds fairly formal, instructional, and technical.

Reasons:

• provjerite is the formal/plural imperative
• neovisno o tome is a formal connector
• fotonaponska elektrana is technical vocabulary

This is exactly the kind of Croatian you might see in:

• manuals
• regulations
• technical documentation
• professional instructions

The structure is:

• Mrežni priključak = direct object
• provjerite = imperative verb
• neovisno o tome = adverbial phrase meaning regardless of that
• je li fotonaponska elektrana nova = subordinate clause meaning whether the photovoltaic power plant is new

So the sentence is basically:

Check the grid connection, regardless of whether the photovoltaic power plant is new.

Yes. Croatian word order is flexible, so you could also say:

• Provjerite mrežni priključak neovisno o tome je li fotonaponska elektrana nova.

This may sound a bit more neutral to many learners because it matches the common verb-first style of instructions.

The original version, with Mrežni priključak first, puts slightly more focus on the thing being checked. Both are natural.

Provjerite comes from provjeriti, which is a perfective verb meaning to check / verify.

In Croatian, perfective verbs are often used in instructions when the action is viewed as a complete act:

• provjeriti = to check, to verify completely

Its imperfective partner is usually:

• provjeravati = to be checking / to check repeatedly / to check as an ongoing process

In an instruction like this, the perfective imperative provjerite is very natural.