فاتورة الكهرباء وتصنيف الطاقة جاهزان اليوم.

Because this is a present-tense nominal sentence in Arabic. In Modern Standard Arabic, you normally do not use a verb for "to be" in the present tense.

So:

• فاتورة الكهرباء وتصنيف الطاقة جاهزان اليوم = The electricity bill and the energy rating are ready today

The idea of are is understood automatically.

If you wanted a past or future meaning, then Arabic would usually use a verb such as كان or سيكون.

Because both phrases are iḍāfa constructions, often called the construct phrase.

• فاتورة الكهرباء = the electricity bill
• تصنيف الطاقة = the energy rating

In an iḍāfa:

• the first noun usually does not take الـ
• the second noun determines whether the whole phrase is definite

So:

• الكهرباء is definite
• therefore فاتورة الكهرباء is definite as a whole

And similarly:

• الطاقة is definite
• therefore تصنيف الطاقة is definite as a whole

That is why فاتورة and تصنيف appear without الـ.

The subject is the whole coordinated phrase:

• فاتورة الكهرباء وتصنيف الطاقة

This contains two noun phrases joined by و:

• فاتورة الكهرباء = the electricity bill
• تصنيف الطاقة = the energy rating

Together, they act as the thing being talked about. Then جاهزان tells you something about them: they are ready.

Because Arabic has a special form for exactly two things: the dual.

Since the sentence is talking about two items:

• فاتورة الكهرباء
• تصنيف الطاقة

Arabic uses the dual predicate:

• جاهزان = ready for two masculine/mixed items

English uses plural for two or more, but Arabic distinguishes:

• singular = one
• dual = two
• plural = three or more

So جاهزان is the natural form here.

Because the sentence has a mixed-gender pair:

• فاتورة is feminine
• تصنيف is masculine

When Arabic refers to a group of two nouns of mixed gender, the agreement normally defaults to masculine.

So the predicate is:

• جاهزان = masculine dual

If both nouns were feminine, you would expect:

• جاهزتان

But with one masculine and one feminine, masculine dual is the normal choice.

Because this word is in the nominative dual form.

In MSA, the dual endings are:

• -ان in the nominative
• -ين in the accusative and genitive

Here, جاهزان is the predicate of a nominal sentence, so it is nominative.

That is why you get:

• جاهزان

not:

• جاهزين

A fully vowelled form would be:

• جاهزانِ

In everyday unvowelled Arabic writing, you usually just see جاهزان.

Because here it is functioning as the predicate, not as part of a definite noun phrase.

In a sentence like this, the predicate adjective is normally indefinite:

• جاهزان = ready

If you said الجاهزان, it would sound more like:

• the two ready ones

That would be a different structure and meaning.

So in this sentence, the correct form is the indefinite predicate:

• جاهزان

اليوم means today, and it functions as a time expression.

In this sentence, it tells you when the bill and the rating are ready:

• جاهزان اليوم = are ready today

Yes, Arabic word order is flexible, so اليوم can move depending on style or emphasis. For example:

• فاتورة الكهرباء وتصنيف الطاقة جاهزان اليوم
• اليوم فاتورة الكهرباء وتصنيف الطاقة جاهزان

Both are possible, though the original version sounds neutral and natural.

Literally, تصنيف الطاقة means something like classification/rating of energy.

But in real-world usage, especially with appliances or buildings, it often means:

• energy rating
• energy efficiency rating
• energy classification

So although the literal structure is straightforward, the natural English equivalent often depends on context.

A fully vowelled version is:

• فَاتُورَةُ الْكَهْرَبَاءِ وَتَصْنِيفُ الطَّاقَةِ جَاهِزَانِ الْيَوْمَ

A rough pronunciation is:

• fātūratu al-kahrabā’i wa-taṣnīfu aṭ-ṭāqati jāhizāni al-yawma

A couple of useful pronunciation notes:

• الكهرباء keeps the l sound in الـ, because ك is not a sun letter
• الطاقة becomes aṭ-ṭāqa, because ط is a sun letter, so the l sound assimilates

So the second phrase is pronounced more like:

• taṣnīfu aṭ-ṭāqati

not:

• taṣnīfu al-ṭāqati