Eu vou informar a falta de energia agora.

Yes. In Portuguese, subject pronouns are often omitted because the verb form already shows who the subject is.

• Eu vou informar...
• Vou informar...

Both mean the same thing here: I’m going to report/inform...

Including Eu can add emphasis, contrast, or clarity. For example, if you want to stress that I am the one doing it, then Eu sounds more natural.

Vou informar is the very common ir + infinitive future construction:

• vou = I go / I am going
• informar = to inform / to report

Together, vou informar means I’m going to inform/report.

This structure is extremely common in Brazilian Portuguese and often sounds more natural in everyday speech than the simple future.

Both are grammatically correct, but they have different feel and frequency.

• Eu vou informar... = very common in speech, natural, conversational
• Eu informarei... = more formal, written, official, or emphatic

In everyday Brazilian Portuguese, people usually prefer vou + infinitive.

It can mean to inform, but in this sentence it may sound closer to to report.

So informar a falta de energia can mean something like:

• report the power outage
• notify someone about the power outage

A learner should know that informar is understandable here, but depending on the context, Brazilians might also say:

• avisar sobre a falta de energia
• comunicar a falta de energia
• reportar a falta de energia (less traditional, but heard in some contexts)

If you are specifically contacting the utility company, you may also hear more explicit versions such as:

• Vou informar a companhia sobre a falta de energia agora.
• Vou avisar a empresa de energia agora.

Falta de energia means lack/absence of electricity, which in natural English is usually power outage, power cut, or loss of power.

Breakdown:

• falta = lack, absence, shortage
• de energia = of energy/electricity

In Brazilian Portuguese, energia here usually means electrical power, not abstract “energy” like personal enthusiasm.

The a is the definite article the.

So:

• a falta de energia = the power outage
• falta de energia = power outage / lack of power in a more general or less specifically marked way

In Portuguese, articles are used more often than in English. Here, a falta de energia sounds like a specific outage that the speaker is referring to.

Because de links the noun falta to what is missing.

• falta de X = lack of X
• falta de água = lack of water
• falta de dinheiro = lack of money
• falta de energia = lack of electricity

This is a standard Portuguese pattern.

It is very common and fully natural, but there are other common expressions too:

• falta de energia = power outage / no electricity
• falta de luz = power outage / no power, very common in daily speech
• queda de energia = power failure / power drop
• apagão = blackout, often larger or more dramatic

So in casual Brazilian Portuguese, many people would very naturally say:

• Vou informar a falta de luz agora.

Agora means now.

In this sentence, it tells you when the speaker is going to do the action:

• Eu vou informar a falta de energia agora.
• I’m going to report the power outage now.

It can suggest either:

• right now / immediately
• now, at this moment

The exact nuance depends on context.

No. Portuguese allows some flexibility.

All of these are possible:

• Eu vou informar a falta de energia agora.
• Agora eu vou informar a falta de energia.
• Eu agora vou informar a falta de energia. (possible, but less common in normal conversation)

The version with agora at the end is very natural.

Yes, it is understandable and grammatical. Still, depending on the situation, some Brazilians might choose a slightly different wording.

For example:

• Vou avisar sobre a falta de energia agora.
• Vou comunicar a falta de energia agora.
• Vou informar a falta de energia para a companhia agora.

Why? Because informar sometimes sounds a bit more formal or slightly incomplete unless it is clear who is being informed.

So your sentence works, but in real life speakers may often specify the receiver or use a more conversational verb.

The sentence does not explicitly say who is receiving the information. It just says:

• I’m going to report/inform the power outage now.

Portuguese allows that if the listener can understand the context. But if you want to be clearer, you can add the receiver:

• Eu vou informar a companhia elétrica agora.
  = I’m going to inform the electric company now.

• Eu vou informar a falta de energia à companhia elétrica agora.
  = I’m going to report the power outage to the electric company now.

• Eu vou informar o porteiro agora.
  = I’m going to inform the building doorman now.

Vou is the eu form of the verb ir (to go) in the present tense.

Present tense of ir:

• eu vou = I go / I’m going
• você/ele/ela vai
• nós vamos
• vocês/eles/elas vão

In vou informar, vou is not about physically going somewhere. It is part of the future expression going to + verb, just like in English.