היסטוריית הצריכה מראה את מספר הקילוואט-שעה בחשבון.

This is the construct state in Hebrew, called סמיכות.

When one noun is followed directly by another noun to mean something like history of consumption, the first noun often changes form. A feminine noun ending in ־ה often changes to ־ת in construct:

היסטוריה → היסטוריית

So:

היסטוריית הצריכה = the history of consumption / consumption history

This is very common in Hebrew, especially in formal, technical, or written language.

Because Hebrew often expresses of by putting two nouns together in a construct chain instead of using a separate word.

So English:

history of consumption

becomes Hebrew:

היסטוריית הצריכה

Literally, it is more like:

consumption-history

This same pattern appears again later in the sentence with מספר הקילוואט-שעה.

In a construct chain, definiteness is usually marked on the second noun, not the first.

So in:

היסטוריית הצריכה

the second noun הצריכה is definite, and that makes the whole phrase definite.

So even though היסטוריית does not have ה־, the whole expression means:

the consumption history

This is a very important Hebrew pattern.

מראה is the present-tense form of the verb להראות, meaning to show.

So:

היסטוריית הצריכה מראה = the consumption history shows

In interface language, instructions, apps, and bills, present tense like this is very common for statements such as:

X shows Y
The page displays Y
The screen shows Y

That is a great question, because the spelling can be confusing.

The subject היסטוריית הצריכה is feminine singular, so the verb should agree with a feminine singular subject. With להראות, the masculine singular and feminine singular forms are often written the same way in unpointed Hebrew:

מראה

With vowels, they are pronounced a little differently, but in normal modern Hebrew writing without ניקוד, they look identical.

So the agreement is fine even though you do not see an obvious feminine ending.

את marks a definite direct object.

Here, the direct object is:

מספר הקילוואט-שעה

So:

מראה את מספר הקילוואט-שעה = shows the number of kilowatt-hours

את usually does not get translated into English. It is a grammatical marker, not a word with a separate meaning like with or to.

A useful rule is:

• use את before a definite direct object
• do not use it before an indefinite direct object

This is another construct-type noun phrase.

מספר means number, and it is linked directly to the unit expression:

מספר הקילוואט-שעה

This means:

the number of kilowatt-hours

Again, Hebrew often prefers a compact noun+noun structure where English uses of.

Also, because הקילוואט-שעה is definite, the whole phrase is definite, which is one reason את is used before it.

Because it is a compound technical unit: kilowatt-hour.

Hebrew often connects this kind of fixed compound with a hyphen, especially in technical, scientific, or bureaucratic writing.

So:

קילוואט-שעה = kilowatt-hour

You can think of it as one measurement term rather than two separate everyday nouns.

A learner might definitely wonder that.

In very careful Hebrew, many speakers might expect a plural form in some contexts when talking about multiple units. However, in technical or interface language, unit names are often treated as fixed labels, so a singular-looking unit can appear after words like מספר.

So for a learner, the safest takeaway is:

• קילוואט-שעה is the name of the unit
• technical Hebrew sometimes uses the unit label in a fixed way rather than focusing on ordinary count-noun behavior

In other words, this is partly a matter of technical style, not just everyday grammar.

בחשבון is made from:

ב־ = in / on / at
חשבון = account / bill

In this context, חשבון means bill or statement, so בחשבון means:

on the bill
or
in the bill/account

It appears as one word because Hebrew attaches prepositions like ב־, ל־, and כ־ directly to the noun.

Also, when ב־ combines with the definite article ה־, the form contracts. So the idea is essentially:

ב + ה + חשבון → בחשבון

Yes. The order is very natural:

היסטוריית הצריכה = subject
מראה = verb
את מספר הקילוואט-שעה = direct object
בחשבון = prepositional phrase

So the sentence follows a very common pattern:

Subject + Verb + Object + Prepositional phrase

This is especially normal in modern written Hebrew, including websites, apps, bills, and official text.